Gotowe bibliografie tematyczne / Organic Luminescent Materials

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Gotowa bibliografia na temat „Organic Luminescent Materials”

Autor: Grafiati

Data publikacji: 6 września 2023

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Artykuły w czasopismach na temat "Organic Luminescent Materials"

Gonzalez-Carrero, Soranyel, Guillermo Mínguez Espallargas, Raquel E. Galian i Julia Pérez-Prieto. "Blue-luminescent organic lead bromide perovskites: highly dispersible and photostable materials". Journal of Materials Chemistry A 3, nr 26 (2015): 14039–45. http://dx.doi.org/10.1039/c5ta01765c.

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Blue-luminescent and dispersible organic–inorganic hybrid perovskites can be produced with a high reaction yield and valuable optical properties, such as luminescence quantum yield over 20% and high photostability under UV light. This material can be assembled–disassembled reversibly.

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Werts, Martinus H. V. "Making sense of Lanthanide Luminescence". Science Progress 88, nr 2 (maj 2005): 101–31. http://dx.doi.org/10.3184/003685005783238435.

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The luminescence of trivalent lanthanide ions has found applications in lighting, lasers, optical telecommunications, medical diagnostics, and various other fields. This introductory review presents the basics of organic and inorganic luminescent materials containing lanthanide ions, their applications, and some recent developments. After a brief history of the discovery, purification and early spectroscopic studies of the lanthanides, the radiative and nonradiative transitions of the 4f electrons in lanthanide ions are discussed. Lanthanide-doped phosphors, glasses and crystals as well as luminescent lanthanide complexes with organic ligands receive attention with respect to their preparation and their applications. Finally, two recent developments in the field of luminescent materials are addressed: near-infrared luminescent lanthanide complexes and lanthanide-doped nanoparticles.

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Wang, Li Hua. "Infrared and Luminescent Properties of Mg (II) Fluorescence Materials". Advanced Materials Research 322 (sierpień 2011): 412–15. http://dx.doi.org/10.4028/www.scientific.net/amr.322.412.

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A new luminescent material, 1-acetyl-2-naphthol-4, 4'-diaminodiphenyl ether Mg (II) has been designed, synthesized and characterized. The infrared spectrum and luminescent properties of Mg (II) material have been investigated. The results indicate that the Mg (II) fluorescent material emits blue luminescence with an emission peak at 455 nm when excited at 327 nm, and the effect of organic solvents on the luminous intensity of Mg (II) fluorescent material was arranged in the order CH3CH2OH > DMSO > solid> CH3OH.

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Shen, Yue, Shiyin Wang, Xiangyu Zhang, Nan Li, Haichao Liu i Bing Yang. "Supramolecular complex strategy for pure organic multi-color luminescent materials and stimuli-responsive luminescence switching". CrystEngComm 23, nr 34 (2021): 5918–24. http://dx.doi.org/10.1039/d1ce00449b.

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Pure organic multi-color luminescent materials were finely tuned from blue through green to red using a supramolecular complex strategy, exhibiting force- and solvent-sensitive luminescence switching in the stimuli-responsive field.

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Dong, Yanhong, Ning-Ning Wei, Liguo Gao, Juanyuan Hao, Dan Vasilescu i Ce Hao. "Theoretical Study on the Sensing Mechanism of Luminescent Metal-Organic Framework [Zn(3-tzba)(2,2′-bipy)(H2O)] · 3H2O for Formaldehyde Detection". Journal of Computational and Theoretical Nanoscience 17, nr 7 (1.07.2020): 2890–96. http://dx.doi.org/10.1166/jctn.2020.8971.

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The sensing mechanism of luminescent metal-organic framework [Zn(3-tzba)(2,2′-bipy)(H2O)] -3H2O for formaldehyde detection was explored by using density functional theory and time-dependent density functional theory methods. Our investigation found that luminescent metal-organic framework [Zn(3-tzba)(2,2′-bipy)(H2O)] • 3H2O is able to interact with formaldehyde through hydrogen bonding to the framework. The luminescent mechanism of the hydrogen-bonded complex is photo-induced electron transfer; while the luminescent mechanism of luminescent metal-organic framework [Zn(3-tzba)(2,2′-bipy)(H2O)]-3H2O is ligand-to-ligand charge transfer. The intermolecu-lar hydrogen bond was found to be stronger in the excited state than that in the ground state by analyzing the geometry nuclear magnetic resonance, binding energy and infrared spectrum in different electronic states. Calculated fluorescence radiative rate coefficient and internal conversion rate coefficient qualitatively indicated a reduced radiative process and an enhanced internal conversion process of the hydrogen-bonded complex. The hydrogen-bonded complex exhibits luminescence weakening or even quenching due to the enhancement of the intermolecular hydrogen bond in the excited state compare with luminescent metal-organic framework [Zn(3-tzba)(2,2′-bipy)(H2O)]-3H2O. The variable luminescence demonstrated the potential of luminescent metal-organic framework [Zn(3-tzba)(2,2′-bipy)(H2O)]-3H2O as luminescent sensor for formaldehyde detection.

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Xing, Zhiming, Wanhui Wu, Yongxiang Miao, Yingqun Tang, Youkang Zhou, Lifang Zheng, Yang Fu, Zhibin Song i Yiyuan Peng. "Recent advances in quinazolinones as an emerging molecular platform for luminescent materials and bioimaging". Organic Chemistry Frontiers 8, nr 8 (2021): 1867–89. http://dx.doi.org/10.1039/d0qo01425g.

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This review summarized recent advances relating to the luminescence properties of quinazolinones and their applications in fluorescent probes, biological imaging and luminescent materials. Their future outlook is also included.

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Shi, Hong. "Properties of Luminescent Materials and Photoelectronic Devices". Journal of Nanoelectronics and Optoelectronics 17, nr 7 (1.07.2022): 1114–19. http://dx.doi.org/10.1166/jno.2022.3290.

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In this paper, an organic light emitting device is designed, and its fabrication and performance are tested. During the stacking process, the relative thickness ratio of each luminescent layer is changed. It is found that the devices show different luminescent characteristics under the condition that the total thickness is the same but the thickness ratio of each luminescent layer is different. Among them, x varies by 8, 6, 4 and 2 nm, while y varies by 2, 4, 6 and 8 nm. Four devices are made. It is found that the electroluminescence spectrum of the device has obvious changes, the color of the device changes significantly from blue to near white, and the brightness and efficiency of the device also have different degrees of change. This paper mainly studies the role of luminescence layer thickness for the brightness in the device. The experimental results show that when x = 6 nm, y = 4 nm, the maximum brightness of the device is 4238 cd/m2, color coordinate (0.31,0.38).

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Song, Xiaoqing, i Hui Xu. "Pure-organic phosphine oxide luminescent materials". Journal of Information Display 21, nr 3 (2.07.2020): 149–72. http://dx.doi.org/10.1080/15980316.2020.1788657.

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Xing, Shanghua, Guang Zeng, Xiaomin Liu, Fen Yang, Zhiqiang Hao, Wei Gao, Yulin Yang i in. "Multifunctional luminescence properties of co-doped lanthanide metal organic frameworks". Dalton Transactions 44, nr 20 (2015): 9588–95. http://dx.doi.org/10.1039/c5dt00249d.

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Multifunctional luminescent materials of six Ln-MOFs have been designed and synthesized by the co-doping strategy. Thus a wide range of light emitting spectra and different temperature-dependent luminescence behavior were displayed.

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Poeplau, Michael, Stephan Ester, Bernd Henning i Thorsten Wagner. "Recombination mechanisms of luminescence type gas sensors". Physical Chemistry Chemical Physics 22, nr 35 (2020): 19948–56. http://dx.doi.org/10.1039/d0cp02269a.

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The impact of the recombination mechanisms in luminescent materials is discussed with regard to luminescence based gas-sensing applications and the use of semiconducting materials, as an alternative to organic–metal complexes, is outlined.

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Rozprawy doktorskie na temat "Organic Luminescent Materials"

Zhang, Lu. "TADF process in blended organic luminescent material". HKBU Institutional Repository, 2016. https://repository.hkbu.edu.hk/etd_oa/340.

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Organic light-emitting diode (OLED) devices have been applied in the fields of display and solid-state lighting. In addition to phosphorescent OLEDs using heavy transition metals, a new approach of harvesting both singlet and triplet excitons generated in the OLED device by using pure organic materials has drawn a lot of attentions in recent years. It is thermally activated delayed fluorescence (TADF) process, which makes it possible to obtain potential 100% internal quantum efficiency (IQE);TADF is a process existing in certain organic materials with small singlet-triplet exchange energy (EST), which is generally observed in the molecules with weak-coupled electron-donating (D) group and electron-accepting (A) group. Individual molecule containing D/A, which is named intramolecular exciplex, or intermolecular exciplex with D/A on separated molecules, can fulfill this requirement. Although at present the intramolecular exciplex attracts considerable research interests, it takes a lot of efforts to design an individual molecule with high fluorescent quantum yield as well as small EST. Intermolecular exciplex, which is achieved by physically blending individual D and A molecules with appropriate selection from present materials, has excellent performance comparable to the phosphorescent emitter.;In this work, we studied the TADF process in an intermolecular exciplex and its application in highly efficient OLED devices. By doping electron-donating material tris(4-carbazoyl-9-ylphenyl)amine (TCTA) with electron-accepting material 2,4,6-tris(3'-(pyridin-3-yl)biphenyl-3-yl)-1,3,5-triazine (Tm3PyBPZ), an exciplex with a green emission around 514 nm was demonstrated. The time-resolved photoluminescence of the exciplex under different temperatures from 12 K to 300 K demonstrated the existence of temperature-dependent delayed fluorescence. By applying this exciplex as the emissive layer, a highly efficient all-fluorescent organic lighting emitting diode with maximum efficiencies of 13.1% and 53.4 lm/W was realized with an extremely low turn-on voltage of only 2.4 V. The efficiencies of the device have outperformed conventional fluorescent OLED devices due to the contribution of triplet excitons. By doping this exciplex with other conventional green or yellow fluorescent dopants, we observed that the performances of these dopants also surpass the limitation of conventional fluorescent OLED (5̃ % external quantum efficiency)

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Gutierrez, Gregory D. (Gregory Daniel). "Luminescent organic materials and their application in solar technologies". Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/117933.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Chemistry, 2016.
Cataloged from PDF version of thesis. Vita.
Includes bibliographical references.
In Chapter 1, we begin with a brief introduction to the principles of photoluminescence from organic materials and the luminescent solar concentrator (LSC). In Chapter 2, we describe the red phosphorescence from a class of four structurally simple benzo[2,1,3]thiadiazoles in cyclohexane. The photophysical properties of these molecules are presented along with a computational analysis of their electronic excited states. Chapter 3 discusses the development and evaluation of an efficient, low-reabsorbing luminescent solar concentrator (LSC) that employs two 7r-conjugated polymers as surrogate absorbers for a minority amount of the perylene bisimide Lumogen F Red 305. We developed a small LSC wherein a mixture of the two polymers act as both the host layer and antennae for a 1.5 wt% loading of Lumogen F Red 305. A Monte Carlo simulation predicts the LSC to possess high edge optical efficiencies and concentration factors on larger, commercially relevant scales. Efforts toward an efficient energy transfer cascade between three 7r-conjugated polymers in poly(methyl methacrylate) (PMMA) are also discussed. Chapter 4 describes an LSC that utilizes a deoxygenated liquid perfluorocarbon (PFC) as the host for a strongly fluorescent perfluoroalkylated thieno[3,4-b]pyrazine between two slabs of PMMA. In the event the luminophore photodegrades after prolonged exposure to sunlight, the luminescent layer can be easily replaced with new solution. Additionally, we demonstrate that the relatively low refractive indices of PFCs causes the luminophore's emission to efficiently couple into the PMMA slabs, where no reabsorption processes can undermine the efficiency of the LSC. In Chapter 5, we present progress toward iptycene-functionalized naphthazarins intended for the development of solid-state luminescent or redox-active metallopolymers.
by Gregory D. Gutierrez.
Ph. D.

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Zheng, Yonghao. "New luminescent organic and organometallic materials for OLED applications". Thesis, Durham University, 2011. http://etheses.dur.ac.uk/830/.

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The design, synthesis and photophysics is presented for a new series of fluorescent carbazole-2,5-diphenyl-1,3,4-oxadiazole dyad molecules and in which the topology and electronic properties are systematically varied by chemical modification. Cyclic voltammetric data, HOMO-LUMO calculations, and X-ray crystallographic analyses are also presented. Our study sheds new light on designing ambipolar molecules and we demonstrate a strategy for precisely tuning the singlet and triplet levels in charge transfer molecules. A family of new 2,5-diphenyl-1,3,4-oxadiazole (OXDs) derivatives bearing ortho-alkyl substituents on one of the phenyl rings is reported. The reactions of these OXDs with IrCl3 under standard cyclometalating conditions did not give the usual μ-dichloro bridged diiridium OXDs complexes. Instead, novel diiridium complexes and monoiridium complexes were isolated and characterised by X-ray crystallography. It is proposed that the unusual structures arise due to the ortho-alkyl substituents leading to a substantial twisting of part of the OXDs system which, for steric reasons, changes the normal course of the metal-ligand coordination reactions. A new high triplet host polymer was synthesised and characterised. Photophysical studies and device data are presented. The triplet energy of this polymer is 2.73 eV. Also, the unoptimised device efficiency (device architecture: ITO/PEDOT:PSS/8% 145 and 40 wt% OXD-7 doped in polymer 133/Ba:Al) is 4.5 cd/A. Our study sheds new light on designing high triplet polymers and we demonstrate a strategy for possessing a high triplet level in a polymer by interrupting the conjugation on the polymer backbone.

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Correia, Sandra Filipa Henriques. "Organic-inorganic hybrid materials for green photonics: luminescent solar concentrators". Doctoral thesis, Universidade de Aveiro, 2017. http://hdl.handle.net/10773/17407.

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Doutoramento em Física
Luminescent solar concentrators are inexpensive devices that aim to increase the efficiency of photovoltaic cells and promote the urban integration of photovoltaic devices, with unprecedented possibilities of energy harvesting through the façade of buildings, urban furniture or wearable fabrics. Generally, they consist of a transparent matrix coated or doped with active optical centres that absorb the incident solar radiation, which is re-emitted at a specific wavelength and transferred by total internal reflection to the edges where the photovoltaic cells are located. The main objective of this work is the production of luminescent solar concentrators whose optically active layer is based on organic-inorganic hybrid materials doped with europium ions or organic dyes, in particular, Rhodamine 6G and Rhodamine 800. Rhodamine 800, as opposed to europium ions and Rhodamine 6G which emit in the visible range, emits in the near infrared (NIR) range, which is an advantage for crystalline Si-based photovoltaic cells, whose efficiency is greater in the NIR. In this work, although the luminescent solar concentrators with planar geometry are addressed, the main focus is the use cylindrical geometry. The use of this type of geometry allows the effect of concentration to be higher relative to the planar geometry, since the ratio between the exposed area and the area of the edges is increased. The cylindrical geometry is exploited by producing luminescent solar concentrators based on polymer optical fibre (plastic) where the optically active layer is on the outside (as a coating) or inside (as a filling in the hollow core) of the optical fibre. Furthermore, the possibility of increasing the exposed area was also dealt with the production of bundles of luminescent solar concentrators in which the plastic optical fibres are placed side by side and, also, by fabricating luminescent solar concentrators with length in the metre scale.
Os concentradores solares luminescentes são dispositivos de baixo custo que têm como objetivo aumentar a eficiência de células fotovoltaicas e promover a integração de dispositivos fotovoltaicos em elementos do dia-a-dia, tornando possível a captura de energia solar, através da fachada de edifícios, mobiliário urbano ou em têxteis. Geralmente, consistem numa matriz transparente coberta ou dopada com centros óticos ativos, capazes de absorver a radiação solar incidente e reemiti-la com um comprimento de onda específico que será transportada, através de reflexão interna total, para as extremidades da matriz onde se encontra(m) a(s) célula(s) fotovoltaica(s). O principal objetivo deste trabalho consiste na produção de concentradores solares luminescentes cuja camada ótica ativa é baseada em materiais híbridos orgânicos-inorgânicos dopados com iões lantanídeos (európio, Eu3+) ou corantes orgânicos, nomeadamente, Rodamina 6G e Rodamina 800. A Rodamina 800, ao contrário dos iões de európio e da Rodamina 6G que emitem na gama do visível, emite na região espetral do infravermelho próximo (NIR), que se revela uma vantagem quando a célula fotovoltaica em uso é composta de silício cristalino, cuja gama de maior eficiência é no NIR. Neste trabalho, apesar de serem abordados concentradores solares luminescentes com geometria planar, o principal foco é a utilização da geometria cilíndrica. Este tipo de geometria permite que o efeito de concentração seja superior, relativamente à geometria planar, uma vez que a razão entre a área exposta e a área das extremidades é aumentada. A geometria cilíndrica é explorada, através da produção de concentradores solares luminescentes com base em fibra ótica polimérica (plástica) em que a camada ótica ativa se encontra no exterior (como um revestimento) ou no interior (como um preenchimento do núcleo oco). Além disso, a possibilidade de aumentar a área exposta foi, também, abordada com o fabrico de uma matriz de concentradores solares luminescentes colocados lado a lado e, também, com o fabrico de concentradores solares luminescentes na escala do metro.

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Manavbasi, Alp. "Development of new inorganic luminescent materials by organic-metal complex route". abstract and full text PDF (UNR users only), 2009. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3387812.

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Atoini, Youssef. "New luminescent hybrid materials : synthesis and properties". Thesis, Strasbourg, 2017. http://www.theses.fr/2017STRAF004/document.

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L'objectif de cette thèse est la synthèse, la caractérisation et l'étude de complexes métalliquesluminescents, en particulier de Pt (II), leurs propriétés d'agrégation en solution, mais également dansun espace confiné ainsi qu’en surface. L'incorporation de complexes de métaux de transition dans lastructure poreuse, et ainsi que leur dépôt à la surface de nanoparticules et dans un cadre métalloorganique(MOF), par greffage post-synthétique, ont été étudiés. Sont également étudiés lacorrélation entre les propriétés de films d’une série de complexes de Pt(II) avec leur morphologie,leur mobilité électronique et la simulation de leur structure auto-assemblée par diffraction auxrayons-X. Les propriétés de luminescence de complexes amphiphiles de Pt(II) sont améliorées àl’intérieur de nanoparticules de silice mesoporeuse par la création d’un d’espace confiné. Un effetsimilaire est observé par le dépôt de complexes de Pt(II) fonctionnalisés sur une surface denanoparticules d’or. La luminescence d’un cadre organométallique a été modifiée par greffage postsynthétiquede complexes d’Ir(III) et de Pt(II)
The aim of this thesis is the synthesis, characterization and investigation of luminescent metalcomplexes, and in particular of Pt(II) compounds, their aggregation properties in solution but inconfined space as well. The incorporation of transition metal complexes in porous structure, and inparticular in a metal-organic framework (MOF), by post-synthesis grafting, have been investigated.Luminescence properties of amphiphilic Pt(II) complexes were enhanced inside mesoporous silicananoparticles by the creation of a confined space. Similar effect is observed by deposition offunctionalized Pt(II) complexes on gold nanoparticles surface. Luminescence of metal organicframework was tuned by post-synthetic grafting of Ir(III) and Pt(II) complexes

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Bellucci, Luca. "Thermometers at the Nanoscale: a Molecular Approach to Design and Develop Functional Lanthanoid-based Luminescent Materials". Doctoral thesis, Università degli studi di Padova, 2019. http://hdl.handle.net/11577/3422334.

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The present work is devoted to the development of lanthanoid-based luminescent thermometers and to the study of the correlations between the thermometric properties and the different building blocks composing the systems. In particular, using rare earth cations, b-diketones (H(b-dike)= dibenzoylmethane, Hdbm; benzoyltrifluoroacetone, Hbta; hexafluoroacetylacetone, Hhfac; thenoyltrifluoroacetone, Htta), and divergent ligands (4,4’-bipyridine, bipy; 4,4’-bipyridine-N-oxide, bipyMO; pyrazine-N-oxide, pyrzMO; 2,5-dihydroxy-1,4-dicarboxylate, H2DHT2-) we prepared molecular systems with different dimensionality: i) dinuclear complexes (0D), ii) Coordination Polymers (CPs, 1D), and Metal-Organic Frameworks (MOFs, 3D). We started with europium β-dike dinuclear compounds with molecular formula [Eu2(β-dyke)6(L-MO)x] (x=3 for hfac, x=2 for dbm, bta, and tta). Substituting the hfac -CF3 groups with phenyl rings (one in bta, two in dbm) or with a thienyl ring (tta) the β-dike electronic and steric properties were modulated. Conversely, the different steric hindrance of bipyMO and pyrzMO influenced the spatial disposition of the β-dike ligands and the inter- and intra-molecular interactions. In the -50 ÷ 100 °C temperature range, the complexes showed relative thermal sensitivity (Sr) values higher than 1 (generally assumed as a quality criterion for these thermometers) that depended on the nature of both the β-dike and L-MO ligands. The β-diketonates influenced Sr values, thermal operative range, and photostability of the system, while pyrzMO-containing compounds showed improved performances (Sr maximum from 4.6 to 8.1 % °C-1 depending on the β-dike ligand) compared to that based on bipyMO (Sr maximum from 3.4 to 5.1 % °C-1). In the second part, a series of ratiometric Eu3+/ Tb3+ luminescent thermometers were obtained by mixing different quantities of the two homometallic [Ln(hfac)3(bipy)]n 1D-CPs (Ln3+= Eu3+ and Tb3+) in spectroscopically inert KBr. Here, we studied the effect of the relative metal amounts and of the excitation wavelength on the Sr. For all the samples, Sr values almost independent from the Tb/Eu molar ratio and the excitation wavelength were found between -190 and 110 °C. Each sample showed a peculiar temperature-dependent emission colour, from green to red, that was exploited to develop colour-coded thermometers able to distinguish temperature intervals in the order of 10/ 20 °C. Then we developed a mild-condition synthetic procedure to obtain single crystal to single crystal post-synthesis modifications of the 3D-MOF [Eu2(H2DHT)3(DMF)4]∙2DMF (DMF= N,N-dimethylformamide) to substitute DMF in the channels with different organic molecules (i.e. CHCl3, imidazole, pyridine, and tetrahydrofuran) and to study the Sr modulation. Depending on the guest molecule, the temperature at which Sr reaches the maximum and its value varied from 2.5 at -90 °C to 4.2 % °C-1 at -10 °C. Molecular compounds like complexes, CPs and MOFs are ideal systems to study the correlations between structure, composition (in the meaning of molecular functionalization) and functional properties because they can be easily modified through chemical processes. Nevertheless, to exploit the unique properties of these compounds in commonly used tools and instruments they need to be integrated into a device. Surface functionalization is a recurrent way to achieve this target. However, maintaining the control on the arrangement of the various building blocks and characterize the functionalized surface is not straightforward, so that the development of “ad hoc” synthetic protocols and methods is required. In this context, we developed a general procedure for surface functionalization. We exploited the reactivity of lanthanoid N,N-dialkylcarbamate complexes to create an ordered Eu3+-Tb3+ heterobimetallic sequence grafted on amorphous silica using terephthalic acid as divergent ligand to connect the two Ln3+ ions. Photoluminescence was here used to determine the spatial disposition of the two metal ions on silica. In particular, Tb3+-to-Eu3+ energy transfer was used as molecular ruler to study the Ln3+ ions spatial distribution and intermetal distances that allow us to obtain data supporting the formation of the desired sequence.
Questo lavoro è volto allo sviluppo di termometri molecolari a base di ioni lantanoidei ed allo studio delle correlazioni tra proprietà termometriche ed i diversi building blocks che compongono i sistemi. In particolare, usando cationi lantanoidei, β-dichetoni (H(β-dike)= dibenzoilmetano, Hdbm; benzoiltrifluoroacetone, Hbta; esafluoroacetilacetone, Hhfac; tenoiltrifluoroacetone, Htta), e leganti divergenti (4,4’-bipiridina, bipy; 4,4’-bipiridina-N-ossido, bipyMO; pirazina-N-ossido, pyrzMO; 2,5-diidrossi-1,4-dicarbossilato, H2DHT2-) sono stati preparati sistemi molecolari con diversa dimensionalità: i) complessi dinucleari (0D), polimeri di coordinazione (CPs, 1D) e Metal Organic Frameworks (MOFs, 3D). Nei complessi dinucleari di europio [Eu2(β-dike)6(L-MO)x] (x=3 per hfac, x=2 per dbm, bta, and tta) le proprietà elettroniche e steriche del β-dichetonato sono state modulate sostituendo i gruppi -CF3 di hfac con anelli fenilici (uno nel bta, due nel dbm) o con un anello tienilico (tta). Il diverso ingombro sterico dei leganti bipyMO e pyrzMO influenzarono invece la disposizione spaziale dei leganti β-dichetonato e le loro interazioni inter- ed intra-molecolari. I complessi mostrarono valori di sensibilità termica relativa (Sr) maggiori di 1 (valore generalmente usato come criterio di qualità per questi termometri) dipendenti dalla natura dei leganti β-dike e L-MO nell’intervallo di temperatura -50 ÷ 100 °C. I leganti β-dichetonato influenzarono i valori di Sr, l’intervallo applicativo di temperature e la fotostabilità dei complessi. I composti contenenti pyrzMO mostrarono performances migliori (Sr massimo da 4.6 a 8.1 % °C-1 a seconda del β-dike) rispetto agli analoghi con bipyMO (Sr massimo da 3.4 a 5.1 % °C-1). Successivamente è stata ottenuta una serie di termometri luminescenti raziometrici a base di Eu3+ e Tb3+ miscelando diverse quantità dei due polimeri di coordinazione 1D [Ln(hfac)3(bipy)]n (Ln3+= Eu3+ e Tb3+) in KBr (inerte dal punto di vista spettroscopico). In questo caso è stato studiato l’effetto su Sr della quantità relativa dei due ioni metallici e della lunghezza d’onda di eccitazione nell’intervallo -190 ÷ 110 °C. Per tutti i campioni i valori di Sr risultarono non influenzati dal rapporto molare Tb/Eu e dalla lunghezza d’onda di eccitazione. Ciascun campione mostrò un peculiare colore emesso (dal verde al rosso) in funzione della temperatura. Ciò è stato sfruttato per sviluppare termometri basati su codici di colori capaci di distinguere intervalli di temperatura di 10/ 20 °C. È stata inoltre sviluppata una procedura basata su condizioni blande per attuare la modifica post-sintetica da cristallo singolo a cristallo singolo del MOF [Eu2(H2DHT)3(DMF)4]∙2DMF (DMF= N,N-dimetilformamide) sostituendo la DMF nei canali con diverse molecole (CHCl3, imidazolo, piridina e tetraidrofurano) per studiare la modulazione di Sr. A seconda della molecola ospitata, la temperatura alla quale si raggiunge il massimo di Sr e il suo valore variarono da 2.5 a -90 °C a 4.2 % °C-1 a -10 °C. Composti molecolari come complessi, CPs e MOFs sono ideali per lo studio delle correlazioni tra struttura, composizione (nel senso di funzionalizzazione molecolare) e proprietà funzionali in quanto facilmente modificabili tramite processi chimici. Tuttavia, è necessario integrare questi sistemi in dispositivi per sfruttare le loro proprietà in strumenti di uso comune. La funzionalizzazione di superfici è una procedura comunemente usata per questo scopo. In questo caso tuttavia, non è semplice mantenere il controllo sulla disposizione dei vari building blocks e caratterizzare la superficie funzionalizzata così che è fondamentale sviluppare un adeguato protocollo sintetico. In questo contesto, è stata messa a punto una procedura sintetica per la funzionalizzazione di superfici. Per questo scopo è stata sfruttata la reattività degli N,N-dialchilcarbammati lantanoidei per creare una sequenza eterobimetallica Eu3+-Tb3+ ordinata aggraffata su silice amorfa, usando l’acido tereftalico come legante divergente per connettere i due centri metallici. La fotoluminescenza è stata qui utilizzata per determinare la distribuzione spaziale dei due ioni metallici sulla silice. In particolare, fenomeni di trasferimento energetico dal Tb3+ all’Eu3+ sono stati usati come righello molecolare per determinare la distribuzione e le distanze intermetalliche ottenendo dati a supporto della formazione della sequenza desiderata.

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Narikiyo, Hayato. "Development of Functional Materials Based on Polyhedral Oligomeric Silsesquioxane with Flexible Side-Chains". Doctoral thesis, Kyoto University, 2021. http://hdl.handle.net/2433/263688.

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付記する学位プログラム名: 充実した健康長寿社会を築く総合医療開発リーダー育成プログラム
京都大学
新制・課程博士
博士(工学)
甲第23227号
工博第4871号
京都大学大学院工学研究科高分子化学専攻
(主査)教授田中一生, 教授秋吉一成, 教授古賀毅
学位規則第4条第1項該当
Doctor of Philosophy (Engineering)
Kyoto University
DGAM

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Lahoud, Marcelo Galindo [UNESP]. "Síntese e investigação da potencialidade de aplicação como material molecular de espécies discretas e Metal Organic Frameworks (MOFs) baseados em íons terras raras". Universidade Estadual Paulista (UNESP), 2016. http://hdl.handle.net/11449/143479.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Este trabalho é dividido em duas partes, na primeira parte foi caracterizado o complexo [Ln(keto)3(H2O)] (Ln = Gd, Eu) por espectroscopia vibracional no infravermelho, analise elementar e otimização da geometria por método DFT. Mas o foco central foram os estudos das propriedades luminescente no intervalo de 12 – 300 K. O espectro de emissão do [Eu(keto)3(H2O)] revela uma forte dependência com a temperatura, bem ilustrada pelo não usual deslocamento amplo para o azul de (17 cm1) da transição 5D07F0 quando a temperatura é elevada de 12 a 300 K. A diferença aritmética entre os espectros de absorção do [Eu(keto)3(H2O)] com o do [Gd(keto)3(H2O)] indicou a presença de uma banda de transferência de carga do ligante para o metal (LMCT) (320-370 nm). A partir da fosforescência do [Gd(keto)3(H2O)] a energia dos estados de tripleto relacionada ao Keto foi determinada mostrando uma grande sobreposição com os níveis intra-4f6 e um forte acoplamento elétron-fônon. A alta ressonância entre o nível LMCT e estados tripletos e os níveis do Eu3+ leva a uma forte dependência do valor do tempo de vida da 5D0, típico da presença de processos de transferência de energia operativos. A segunda parte desse trabalho compreendeu na síntese, caracterização e estudos das propriedades luminescente e magnéticas de uma MOF inédito de formula [Eu2(Btec)1,5(H2O)]n. A MOF foi sintetizada por via hidrotermal e caracterizado por DRX de monocristal e pó, espectroscopia vibracional no infravermelho, reflectância difusa, analise elementar, analise térmica, microscopia eletrônica de varredura e fisissorção de N2. O composto apresentou boa estabilidade térmica no entanto mostrou-se ter baixa porosidade. A MOF apresentou emissão na região do vermelho com elevado rendimento quântico de emissão, mostrando que o ligante é um bom sensibilizador nesse sistema. As emissões dos íons Eu3+ mostraram-se ser uma sonda espectroscópica, contribuindo na elucidação da estrutura. Foi observado uma dependência térmica em relação à intensidade das transições originárias do nível 7F1, em especial a transição 7F15D1. Além disso, as transições intraconfiguracionais 4f-4f mostram ter uma boa fotoestabilidade. Resultados de susceptibilidade magnética mostram íons Eu3+ magneticamente afastados e portanto os torna uma fraca probe estrutural.
This work is divided into two parts, the first part was characterized the complex [Ln(keto)3(H2O)] (Ln = Gd, Eu) by infrared spectroscopy, elemental analysis and geometry optimization by DFT method. But the central focus was the study of luminescent properties in the 12-300 K interval. The emission spectra of [Eu(keto)3(H2O)] reveal a strong dependence with the temperature, well-illustrated by an unusual large blue-shift (17 cm1) of the 5D07F0 transition as the temperature is raised from 12 to 300 K. The arithmetic difference between the absorption spectrum of [Eu(keto)3(H2O)] with that of [Gd(keto)3(H2O)] pointed out the presence of a ligand-to-metal charge transfer (LMCT) band (320-370 nm). From the [Gd(keto)3(H2O)] phosphorescence the energy of the keto-related triplet states was determined showing a large overlap with the intra-4f 6 levels and a strong electron-phonon coupling. The high-resonance between the LMCT and triplet states and the Eu3+ levels leads to a strong dependence of the 5D0 lifetime value, typical of the presence of operative energy transfer processes. The second part of this work included in the synthesis, characterization and study of luminescence and magnetic properties of a novel MOF formula [Eu2(Btec)1,5(H2O)]n. The MOF was synthesized by way hydrothermal and characterized by XRD of single crystal and powder, infrared spectroscopy, diffuse reflectance, elemental analysis, thermal analysis, scanning electron microscopy and N2 physisorption. Compound demonstrated good thermal stability however proved to have low porosity. MOF showed emission in the red region with a high emission quantum yield, showing that the ligand is a good sensitizer in the system. The emission of Eu3+ ions proved to be a spectroscopic probe, contributing to the elucidation of the structure. A thermal dependence was observed in relation to the intensity of originating 7F1 level transitions, in particular the 7F15D1 transition. Furthermore, the 4f-4f transitions intraconfigurational shown to have a good photostability. Magnetic susceptibility results show Eu3+ ions separated magnetically and thus makes a weak probe structure.

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Miller, Paul Francis. "Luminescence studies of molecular materials". Thesis, Imperial College London, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.342250.

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Książki na temat "Organic Luminescent Materials"

Krasovit͡skiĭ, B. M. Organic luminescent materials. Weinheim: VCH, 1988.

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Blasse, G. Luminescent materials. Berlin: Springer-Verlag, 1994.

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H, Kafafi Zakya, So Franky i Society of Photo-optical Instrumentation Engineers., red. Organic light-emitting materials and devices X: 13-16 August, 2006, San Diego, California, USA. Bellingham, Wash: SPIE, 2006.

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Krasovitskii, B. M., i B. M. Bolotin. Organic Luminescent Materials. Wiley & Sons, Incorporated, John, 1988.

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Grabmaier, B. C., i G. Blasse. Luminescent Materials. Springer London, Limited, 2012.

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Yan, Bing. Rare Earth Metal-Organic Framework Hybrid Materials for Luminescence Responsive Chemical Sensors. Elsevier Science & Technology, 2022.

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Rare Earth Metal-Organic Framework Hybrid Materials for Luminescence Responsive Chemical Sensors. Elsevier, 2022. http://dx.doi.org/10.1016/c2020-0-04075-2.

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Yan, Bing. Rare Earth Metal-Organic Framework Hybrid Materials for Luminescence Responsive Chemical Sensors. Elsevier Science & Technology, 2023.

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Części książek na temat "Organic Luminescent Materials"

Peng, Junbiao. "Organic/Polymer Luminescent Materials and Devices". W Phosphor Handbook, 337–54. Boca Raton: CRC Press, 2021. http://dx.doi.org/10.1201/9781003098690-6.

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Bulović, V., M. A. Baldo i S. R. Forrest. "Excitons and Energy Transfer in Doped Luminescent Molecular Organic Materials". W Organic Electronic Materials, 391–441. Berlin, Heidelberg: Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-642-56425-3_11.

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More, Yogeshwar D., Sahel Fajal, Subhajit Dutta i Sujit K. Ghosh. "Luminescent Metal-Organic Frameworks as Chemical Sensors". W Materials for Chemical Sensors, 96–134. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003039778-5.

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Yagi, Shigeyuki. "Luminescent Materials for Organic Light-Emitting Diodes". W Progress in the Science of Functional Dyes, 561–601. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-4392-4_16.

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Bünzli, J. C. G. "Rare Earth Luminescent Centers in Organic and Biochemical Compounds". W Spectroscopic Properties of Rare Earths in Optical Materials, 462–99. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/3-540-28209-2_9.

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Smola, S. S., O. V. Snurnikova, E. N. Fadeyev i N. V. Rusakova. "Sol–Gel Organic–Inorganic Hybrid Materials Containing Lanthanide Complexes with Polydentate Acyclic and Cyclic Ligands: Synthesis and Spectral-Luminescent Properties". W Springer Proceedings in Physics, 309–25. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-7675-7_21.

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Horváth, Pavel, František Schauer, Ivo Kuřitka, Ota Salyk, Martin Weiter, Norbert Dokoupil, Stanislav Nešpůrek i Vlastimil Fidler. "Luminescence in Organic Silicons Prepared from Organic Precursors in Plasma Discharges". W Molecular Materials and Functional Polymers, 177–83. Vienna: Springer Vienna, 2001. http://dx.doi.org/10.1007/978-3-7091-6276-7_18.

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Movaghar, B., M. Grünewald i B. Ries. "Luminescence and Relaxation of Energy in Disordered Organic and Inorganic Materials". W Disordered Semiconductors, 723–43. Boston, MA: Springer US, 1987. http://dx.doi.org/10.1007/978-1-4613-1841-5_75.

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Nakatani, Naoki, Jia-Jia Zheng i Shigeyoshi Sakaki. "Approach of Electronic Structure Calculations to Crystal". W The Materials Research Society Series, 209–55. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-0260-6_11.

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AbstractNowadays, the importance of molecular crystals and solids with regular structures is increasing in both basic chemistry and applied fields. However, theoretical studies of those systems based on electronic structure theories have been limited. Although density functional theory (DFT) calculations using generalized gradient approximation type functional under periodic boundary condition is effective for such theoretical studies, we need some improvements for calculating the dispersion interaction and the excited state of crystals. Accordingly, in this chapter, two methods for calculating the electronic structures of molecular crystals are discussed: cluster-model/periodic-model (CM/PM)-combined method and quantum mechanics/periodic-molecular mechanics (QM/periodic-MM) method. In the CM/PM-combined method, an infinite crystal system is calculated by the DFT method under periodic boundary condition, and important moieties, which are represented by CMs, are calculated by either DFT method with hybrid-type functionals or wave function theories such as the Møller–Plesset second-order perturbation theory (MP2), spin-component-scaled-MP2, and coupled-cluster singles and doubles theory with perturbative triples (CCSD(T)). This method is useful for gas adsorption into crystals such as metal–organic frameworks. In the QM/periodic-MM method, an important moiety is calculated using a QM method such as the DFT method with hybrid-type functionals and wave function theories, where the effects of the crystal are incorporated into the QM calculation via the periodic MM method using a classical force field. This method is useful for theoretical studies of excited states and chemical reactions. The applications of these methods in the following processes are described in this chapter: adsorption of gas molecules on metal–organic frameworks, chemical reactions in crystals, and luminescence of the crystals of transition metal complexes. To the best of our knowledge, the theoretical calculations conducted in this chapter show one of the successful approaches of electronic structure theories to molecular crystals, because of the reasonable and practical approximations.

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Liu, Jianzhao, Jacky W. Y. Lam i Ben Zhong Tang. "AIE Materials Towards Efficient Circularly Polarized Luminescence, Organic Lasing, and Superamplified Detection of Explosives". W Aggregation-Induced Emission: Fundamentals, 107–29. Chichester, United Kingdom: John Wiley and Sons Ltd, 2013. http://dx.doi.org/10.1002/9781118735183.ch23.

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Streszczenia konferencji na temat "Organic Luminescent Materials"

Leung, Chris Wai Tung, i Ben Zhong Tang. "Luminescent AIE materials for high-performance sensing applications". W SPIE Organic Photonics + Electronics, redaktorzy Zhenan Bao, Iain McCulloch, Ruth Shinar i Ioannis Kymissis. SPIE, 2014. http://dx.doi.org/10.1117/12.2060763.

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Troisi, Alessandro. "Digital materials discovery in organic electronics". W Frontiers in Luminescent Organic Semiconductor Materials and Devices, redaktorzy Andrew P. Monkman, Thomas Penfold i Eli Zysman-Colman. SPIE, 2023. http://dx.doi.org/10.1117/12.2655610.

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Weber, Marvin J., J. Wong, R. B. Greegor, F. W. Lytle i D. R. Sandstrom. "Optically detected x-ray absorption spectroscopy of luminescent materials". W OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1989. http://dx.doi.org/10.1364/oam.1989.mgg2.

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X-ray absorption near edge and extended fine structure (EXAFS/XANES) has been observed from luminescence excitation spectra of crystals and glasses using synchrotron radiation. The luminescence may either be intrinsic (recombination radiation from alkaki halides, alkaline earth fluorides, oxides) or from activator ions (rare earths, transition metals, organic dyes) excited directly or indirectly. Core electron excitations of cations and anions in luminescent materials have been investigated in the energy range from the VUV to hard x-rays. Absorption features may appear as an increase or decrease in the luminescence intensity depending on the sample thickness with respect to the x-ray absorption length, observation geometry, and intermediate relaxation processes. For materials with multiple sites, conventional x-ray absorption spectroscopy measures some average of different site populations. Since luminescence spectra vary with the local environment, using optical detection measurements can be both atom specific via the characteristic x-ray absorption edge energy and site and valence specific via the optical wavelength.

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Olivier, Yoann. "A computational journey through thermally activated delayed fluorescence materials". W Frontiers in Luminescent Organic Semiconductor Materials and Devices, redaktorzy Andrew P. Monkman, Thomas Penfold i Eli Zysman-Colman. SPIE, 2023. http://dx.doi.org/10.1117/12.2656055.

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Quan, Changyun, Han Nie, Zujin Zhao i Ben Zhong Tang. "N-type organic luminescent materials based on siloles with aggregation-enhanced emission". W SPIE Organic Photonics + Electronics, redaktorzy Franky So, Chihaya Adachi i Jang-Joo Kim. SPIE, 2015. http://dx.doi.org/10.1117/12.2187863.

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Gmelch, Max, Heidi Thomas, Felix Fries, Tim Achenbach i Sebastian Reineke. "Rewritable luminescent tags using room-temperature phosphorescence (RTP) (Conference Presentation)". W Organic Photonic Materials and Devices XXII, redaktorzy Christopher E. Tabor, François Kajzar i Toshikuni Kaino. SPIE, 2020. http://dx.doi.org/10.1117/12.2541863.

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Liu, Jing, Rik Van Deun, Luca Pilia, Pieter Geiregat i Flavia Artizzu. "Controlling energy transfer routes in dye-sensitized lanthanide-based luminescent nanoparticles". W Organic Photonic Materials and Devices XXII, redaktorzy Christopher E. Tabor, François Kajzar i Toshikuni Kaino. SPIE, 2020. http://dx.doi.org/10.1117/12.2544218.

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Runina, K. I., O. B. Petrova, A. V. Khomyakov, M. P. Zykova, I. Ch Avetissov i M. N. Mayakova. "Organo-Inorganic Luminescent Hybrid Materials Based on Lead Fluoride and Organic Phosphors". W 2019 IEEE 8th International Conference on Advanced Optoelectronics and Lasers (CAOL). IEEE, 2019. http://dx.doi.org/10.1109/caol46282.2019.9019423.

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de Vries, Xander, Reinder Coehoorn i Peter A. Bobbert. "High-energy acceptor states strongly enhance exciton transfer between metal organic phosphorescent dyes". W Frontiers in Luminescent Organic Semiconductor Materials and Devices, redaktorzy Andrew P. Monkman, Thomas Penfold i Eli Zysman-Colman. SPIE, 2023. http://dx.doi.org/10.1117/12.2644998.

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Redmond, Gareth. "Looking inside conjugated polymer nanoparticles: linking in situ rotational diffusion to intra-particle polymer chain organisation". W Frontiers in Luminescent Organic Semiconductor Materials and Devices, redaktorzy Andrew P. Monkman, Thomas Penfold i Eli Zysman-Colman. SPIE, 2023. http://dx.doi.org/10.1117/12.2645102.

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