Bibliografie tematiche / Polypyridyl

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Letteratura scientifica selezionata sul tema "Polypyridyl"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 21 febbraio 2023

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Articoli di riviste sul tema "Polypyridyl"

Mazuryk, Olga, Przemysław Gajda-Morszewski e Małgorzata Brindell. "Versatile Impact of Serum Proteins on Ruthenium(II) Polypyridyl Complexes Properties - Opportunities and Obstacles". Current Protein & Peptide Science 20, n. 11 (24 ottobre 2019): 1052–59. http://dx.doi.org/10.2174/1389203720666190513090851.

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Ruthenium(II) polypyridyl complexes have been extensively studied for the past few decades as promising anticancer agents. Despite the expected intravenous route of administration, the interaction between Ru(II) polypyridyl compounds and serum proteins is not well characterized and vast majority of the available literature data concerns determination of the binding constant. Ru-protein adducts can modify the biological effects of the Ru complexes influencing their cytotoxic and antimicrobial activity as well as introduce significant changes in their photophysical properties. More extensive research on the interaction between serum proteins and Ru(II) polypyridyl complexes is important for further development of Ru(II) polypyridyl compounds towards their application in anticancer therapy and diagnostics and can open new opportunities for already developed complexes.

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O’Neill, Luke, Laura Perdisatt e Christine O’Connor. "Structure-Property Relationships for a Series of Ruthenium(II) Polypyridyl Complexes Elucidated through Raman Spectroscopy". Journal of Spectroscopy 2018 (1 novembre 2018): 1–11. http://dx.doi.org/10.1155/2018/3827130.

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A series of ruthenium polypyridyl complexes were studied using Raman spectroscopy supported by UV/Vis absorption, luminescence spectroscopy, and luminescence lifetime determination by time-correlated single photon counting (TCSPC). The complexes were characterised to determine the influence of the variation of the conjugation across the main polypyridyl ligand. The systematic and sequential variation of the main polypyridyl ligand, 2-(4-formylphenyl)imidazo[4,5-f][1,10]phenanthroline (FPIP), 2-(4-cyanophenyl)imidazo[4,5-f][1,10]phenanthroline (CPIP), 2-(4-bromophenyl)imidazo[4,5-f][1,10]phenanthroline (BPIP), and 2-(4-nitrophenyl)imidazo[4,5-f][1,10]phenanthroline (NPIP) ligands, allowed the monitoring of very small changes in the ligands electronic nature. Complexes containing a systematic variation of the position (para, meta, and ortho) of the nitrile terminal group on the ligand (the para being 2-(4-cyanophenyl)imidazo[4,5-f][1,10]phenanthroline (p-CPIP), the meta 2-(3-cyanophenyl)imidazo[4,5-f][1,10]phenanthroline (m-CPIP) and 2-(2-cyanophenyl)imidazo[4,5-f][1,10]phenanthroline (o-CPIP)) were also characterised. Absorption, emission characteristics, and luminescence yields were calculated and correlated with structural variation. It was found that both the electronic changes in the aforementioned ligands showed very small spectral changes with an accompanying complex relationship when examined with traditional electronic methods. Stokes shift and Raman spectroscopy were then employed as a means to directly gauge the effect of polypyridyl ligand change on the conjugation and vibrational characteristics of the complexes. Vibrational coherence as measured as a function of the shifted frequency of the imizodale bridge was shown to accurately describe the electronic coherence and hence vibrational cooperation from the ruthenium centre to the main polypyridyl ligand. The well-defined trends established and elucidated though Raman spectroscopy show that the variation of the polypyridyl ligand can be monitored and tailored. This allows for a greater understanding of the electronic and excited state characteristics of the ruthenium systems when traditional electronic spectroscopy lacks the sensitivity.

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Lu, Xiaoqing, Shuxian Wei, Chi-Man Lawrence Wu, Ning Ding, Shaoren Li, Lianming Zhao e Wenyue Guo. "Theoretical Insight into the Spectral Characteristics of Fe(II)-Based Complexes for Dye-Sensitized Solar Cells—Part I: Polypyridyl Ancillary Ligands". International Journal of Photoenergy 2011 (2011): 1–11. http://dx.doi.org/10.1155/2011/316952.

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The design of light-absorbent dyes with cheaper, safer, and more sustainable materials is one of the key issues for the future development of dye-sensitized solar cells (DSSCs). We report herein a theoretical investigation on a series of polypyridyl Fe(II)-based complexes of FeL2(SCN)2, [FeL3]2+, [FeL′(SCN)3]-, [FeL′2]2+, and FeL′′(SCN)2(L = 2,2′-bipyridyl-4,4′-dicarboxylic acid, L′ = 2,2′,2″-terpyridyl-4,4′,4″-tricarboxylic acid, L″= 4,4‴-dimethyl-2,2′ : 6′,2″ :6″,2‴-quaterpyridyl-4′,4″-biscarboxylic acid) by density functional theory (DFT) and time-dependent DFT (TD-DFT). Molecular geometries, electronic structures, and optical absorption spectra are predicted in both the gas phase and methyl cyanide (MeCN) solution. Our results show that polypyridyl Fe(II)-based complexes display multitransition characters of Fe → polypyridine metal-to-ligand charge transfer and ligand-to-ligand charge transfer in the range of 350–800 nm. Structural optimizations by choosing different polypyridyl ancillary ligands lead to alterations of the molecular orbital energies, oscillator strength, and spectral response range. Compared with Ru(II) sensitizers, Fe(II)-based complexes show similar characteristics and improving trend of optical absorption spectra along with the introduction of different polypyridyl ancillary ligands.

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Nandhini, T., K. R. Anju, V. M. Manikandamathavan, V. G. Vaidyanathan e B. U. Nair. "Interactions of Ru(ii) polypyridyl complexes with DNA mismatches and abasic sites". Dalton Transactions 44, n. 19 (2015): 9044–51. http://dx.doi.org/10.1039/c5dt00807g.

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Amiri, Mona, Octavio Martinez Perez, Riley T. Endean, Loorthuraja Rasu, Prabin Nepal, Shuai Xu e Steven H. Bergens. "Solid-phase synthesis and photoactivity of Ru-polypyridyl visible light chromophores bonded through carbon to semiconductor surfaces". Dalton Transactions 49, n. 29 (2020): 10173–84. http://dx.doi.org/10.1039/d0dt01776k.

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Race, N. A., W. Zhang, M. E. Screen, B. A. Barden e W. R. McNamara. "Iron polypyridyl catalysts assembled on metal oxide semiconductors for photocatalytic hydrogen generation". Chemical Communications 54, n. 26 (2018): 3290–93. http://dx.doi.org/10.1039/c8cc00453f.

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Pierroz, Vanessa, Riccardo Rubbiani, Christian Gentili, Malay Patra, Cristina Mari, Gilles Gasser e Stefano Ferrari. "Dual mode of cell death upon the photo-irradiation of a RuIIpolypyridyl complex in interphase or mitosis". Chemical Science 7, n. 9 (2016): 6115–24. http://dx.doi.org/10.1039/c6sc00387g.

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Liu, Ze-Yu, Jin Zhang, Yan-Mei Sun, Chun-Fang Zhu, Yan-Na Lu, Jian-Zhong Wu, Jing Li, Hai-Yang Liu e Yong Ye. "Photodynamic antitumor activity of Ru(ii) complexes of imidazo-phenanthroline conjugated hydroxybenzoic acid as tumor targeting photosensitizers". Journal of Materials Chemistry B 8, n. 3 (2020): 438–46. http://dx.doi.org/10.1039/c9tb02103e.

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Martin, Aaron, Aisling Byrne, Ciarán Dolan, Robert J. Forster e Tia E. Keyes. "Solvent switchable dual emission from a bichromophoric ruthenium–BODIPY complex". Chemical Communications 51, n. 87 (2015): 15839–41. http://dx.doi.org/10.1039/c5cc07135f.

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Leem, Gyu, Shahar Keinan, Junlin Jiang, Zhuo Chen, Toan Pho, Zachary A. Morseth, Zhenya Hu et al. "Ru(bpy)32+ derivatized polystyrenes constructed by nitroxide-mediated radical polymerization. Relationship between polymer chain length, structure and photophysical properties". Polymer Chemistry 6, n. 47 (2015): 8184–93. http://dx.doi.org/10.1039/c5py01289a.

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Tesi sul tema "Polypyridyl"

Zheng, Sipeng. "The reactions of ruthenium (ii) polypyridyl complexes". Thesis, Nelson Mandela Metropolitan University, 2009. http://hdl.handle.net/10948/1089.

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Abstract (sommario):

Ruthenium (II) polypyridine complexes in general have been extensively studied because of their unique redox and photochemical properties. A typical example of such complexes is tris(2,2’-bipyridyl) ruthenium (II). In this study, this complex was synthesized and then characterized using electronic spectroscopy and cyclic voltammetry. It was also shown that the ruthenium concentration could be accurately determined using ICP-MS. It was found that the complex is very stable in various chemical environments. It was observed from spectrophotometric investigations that persulphate and lead dioxide easily oxidize Ru(bpy)3 2+ to Ru(bpy)3 3+ in the presence of heat and H2SO4, respectively. It was also observed that the oxidation between Ru(bpy)3 2+ and cerium (IV) occurred at approximately 3:2 [Ce(IV)]/[Ru(II)] mole ratio. The resultant Ru(bpy)3 3+ solution was unstable in the presence of light and recovery of Ru(bpy)3 2+ occurred gradually. The regeneration of Ru(bpy)3 2+ from Ru(bpy)3 3+ was found to be a multistep process, which appears to involve the formation of an intermediate species. The following reaction model was found to best explain the kinetic data obtained: Ru(bpy)3 2+ + Ce(IV) → Ru(bpy)3 3+ Ru(bpy)3 3+ → Ru(bpy)3 2+ Ru(bpy)3 3+ → Ru* intermediate Ru* intermediate → Ru(bpy)3 2+ Theoretical rate constants were also calculated for the same process under the experimental conditions. The comparison between the experimental and theoretical results gave good agreement. In addition, the factors that influence the rate of the regeneration of Ru(bpy)3 2+ from Ru(bpy)3 3+ were also discussed.

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Williams, R. Lee. "Ruthenium-Platinum Polypyridyl Complexes: Synthesis and Characterization". Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/44315.

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A series of bimetallic (RuII, PtII) complexes were synthesized with the general formula [(tpy)RuCl(BL)PtCl2](PF6) (tpy = 2,2':6',2"-terpyridine and BL = bridging ligand) and their spectroscopic, electrochemical, and DNA binding properties studied. The bridging ligands used in these complexes were 2,3-bis(2'-pyridyl)pyrazine (dpp), 2,3-bis(2'-pyridyl)quinoxaline (dpq) and 2,3-bis(2'-pyridyl)benzoquinoxaline (dpb). These complexes combine light-absorbing RuII-polypyridyl chromophores and a cis-PtCl2 structural motif known to bind DNA. The Ru-bound chloride may be substituted, enabling further modification of the spectroscopic properties. The synthesis of [(tpy)RuCl(BL)PtCl2](PF6) utilizes a building block approach that allows modifications to the series of complexes within the general synthetic scheme. This illustrates the applicability of this scheme to the development of new series of complexes. The lowest-energy absorption for the three complexes is assigned to a Ru(dp)-to-BL(p*) charge transfer transition. This transition shifts to lower energy as the ligand is varied from dpp to dpq to dpb. The first and second reductions are BL(0/-) and BL(-/2-) based and shift to more positive potentials from dpp to dpq to dpb. The Ru(II/III) redox couple remains at a nearly constant potential for the series. All three compounds show DNA binding when incubated with linearized plasmid DNA. Adduct formation was assessed by agarose gel electrophoresis as a retardation of band migration. when incubated with linearized plasmid DNA. Adduct formation was assessed by agarose gel electrophoresis as a retardation of band migration.
Master of Science

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Johansson, Olof. "Ruthenium(II) Polypyridyl Complexes : Applications in Artificial Photosynthesis". Doctoral thesis, Stockholm : Institutionen för organisk kemi, Univ, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-93.

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Jones, Lucy. "Two-photon applications of transition metal polypyridyl complexes". Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/twophoton-applications-of-transition-metal-polypyridyl-complexes(a236f479-d27c-4a92-8b13-bfac51bb14d7).html.

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Materials that undergo two-photon absorbtion (2PA), the simultaneous absorption of two photons, are finding increasing use in many applications including 3D fluorescence microscopy, 3D data storage, and photodynamic therapy (PDT). For efficient use, a large two-photon cross-section is desired which can arise from centrosymmetric charge transfer in push-pull electron donor-acceptor (D-A) diads. These structural motifs have been applied to the construction of organic-based chromophores yielding materials with remarkably high two-photon absorption cross-sections, yet, few metal based examples have been studied. Hence, this thesis concerns research into enhanced two photon absorption and emission properties of d6 transition metal complexes bearing suitably structurally modified polypyridyl chromophores using a combination of experimental and theoretical data Two polar tolylterpyridyl-stilbene amine ligands, where NR2 = methyl and phenyl (1a and 1b respectively) have been synthesised and coordinated to a range of d6 transition metals as D-Ï-A-Ï-D motifs (RuII and IrIII) or D-Ï-A variations (ReI and PtII). A single crystal X-ray structure of ligand (1b) was obtained. Spectroscopic analysis indicated successful synthesis of all compounds. One photon luminescence spectroscopy indicated ligand centred emissions for all compounds. Unfortunately, 2PA measurements were unsuccessful for the compounds due to their weak emission and likely small cross-sections too low for the equipment available. Attempts at cis-trans isomerisation of the stilbene bond in the ligands 1a and 1b by UV irradiation were successful, and the isomerisation process was monitored by both UV-visible spectroscopy and 1H NMR spectroscopy. Two 5-substituted-1,10-phenanthroline ligands bearing fluorenyl units (7 and 8) were successfully coordinated to IrIII cyclometallated with phenylpyridine (ppy) and benzo-[H]-quinoline (pq). A single crystal X-ray structure was obtained for [Ir(ppy)2(7)][PF6] (7a). The complexes demonstrated strong emission originating from a triplet metal to ligand charge transfer (3MLCT) excited states due to their long lived luminescent lifetimes measured up to 2 Î1⁄4s. Quantum yields were measured up to 22 % and theie triplet oxygen quenching efficiencies were established by their Stern-Volmer quenching constants, KSV that were determined to be ca. 40 bar-1 and 60 bar-1 for the ppy complexes of 7 and 8 respectively. Preliminary in vitro experiments performed with C6 Glioma cells treated with [Ir(ppy)2(7)][PF6] (7a) show efficient sensitization for triplet oxygen (3O2) by two-photon excitation at 740 nm resulting in photodynamic effects which led to localised cell damage and death. This complex also demonstrated relatively high two-photon absorption cross-sections ranging from 50-80 Goeppert-Mayer units (GM) between 750 and 800 nm. Two new ReI complexes have been synthesised utilising the ligands 7 and 8 (7c and 8c). A single crystal X-ray structure was obtained for Re(CO)3(7)Cl. (7c) These complexes also exhibited relatively long luminescence lifetimes of ca. 300 ns originating from a 3MLCT state, but emission quantum yields were much lower than corresponding IrIII complexes. The Stern-Volmer quenching analysis demonstrated much less efficient quenching by 3O2, with KSV values of around 8 bar-1 for both compounds. A ligand containg a fluorenyl linker between two 5-substituted-1,10-phenanthroline units (9) has been utilised as a bridge for IrIII-ReI (9a) and IrIII- RuII (9b) complexes. Emission in these complexes arises from 3MLCT excited states and both exhibit dual component long lived luminescent lifetimes up to 1.3 Î1⁄4s and quantum yields around 22 %. KSV constants were measured at 23 and 41 bar-1 for Ir-Re (9a) and Ir-Ru (9b) respectively. Furthermore, the Ir-Ru complex demonstrated a markedly large two-photon cross-section of 350 GM at 730 nm.

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Smith, Nichola Ann. "Photoactivatable Ru(II) polypyridyl complexes as antibacterial agents". Thesis, University of Warwick, 2015. http://wrap.warwick.ac.uk/76173/.

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Novel photoactive ruthenium(II) complexes were designed to incorporate existing anti-tuberculosis drugs, isoniazid and nicotinamide, that could be released from the ruthenium(II) cage by photoactivation with visible light. Two sets of complexes were synthesised based on cis-[Ru(N-N')2(L)2][PF6]2and cis-[Ru(N-N')2(L)X][PF6], where N-N' is 2,2'-bipyridine (bpy) or 1,10-phenanthroline (phen), L is isoniazid (INH) or nicotinamide (NA) and X is either Cl or I. Their dynamic behaviour in solution was explored using NMR to probe the presence of atropisomers. In the case of cis-[Ru(bpy)2(NA)Cl][PF6] (1) and cis-[Ru(bpy)2(NA)I][PF6] (2), the rotation of NA is hindered on the NMR timescale at room temperature, behaviour that was surprisingly not observed for cis-[Ru(bpy)2(NA)2][PF6]2 (5). The hindered rotation was explored by computational methods (DFT) and revealed that hydrogen bonding between the halide and protons of the NA ligand hindered the rotation. The photochemical properties of the Ru(II) complexes were explored by UV-visible spectroscopy and liquid chromatography. All cis-[Ru(N-N')2(L)2][PF6]2complexes in aqueous solution release one ligand, L, in under 1 min using a blue LED (λirr = 463 nm, 50 mW cm- 2 ) to form the photoproduct cis-[Ru(N-N')2(L)(H2O)] 2+ . Continued photoirradiation releases a second ligand, L, with the production of various Ru(II) and Ru(III) aqua photoproducts (with both cis and trans geometry). Interestingly their production was dependent on the power of the light source. Complementary computational studies (DFT/TD-DFT) were utilised to understand structure-activity relationships with respect to photoactivity. The results from the calculations suggest that the number of key electronic transitions (notably1 MLCT) and the favourable leaving properties of the ligand, L, influence the rate of photorelease. In the latter case, a stronger p-accepting leaving ligand shifts the dissociative 3 MC state to lower energy, thus promoting more efficient ligand release. The photobiological properties of the Ru(II) complexes were explored by investigating binding to biomolecules and screening their antibacterial activity in vitro. The complex cis-[Ru(bpy)2(INH)2][PF6]2 (4) binds to the nucleobase 9-ethylguanine (9-EtG) after photoirradiation with a blue LED to produce cis-[Ru(bpy)2(INH)(9-EtG)] 2+ , however reaction with the amino acid L-cysteine was not observed. A 96-array blue LED (λirr = 465 nm, 20 mW cm-2 ) and 32-array multi-coloured LED (λirr = 465 nm, 520 nm, 589 nm and 625 nm, 5 mW cm-2 ) were designed in-house to screen the activity of the complexes in vitro. Their design and construction is described in detail. When tested against Mycobacterium smegmatis (a model for Mycobacterium tuberculosis), complexes cis-[Ru(bpy)2(INH)2][PF6]2 (4) and cis-[Ru(phen)2(INH)2][PF6]2 (6) showed the greatest activity upon photoirradiation for 1 min with a blue LED, with at least a 3x increase in potency when compared to the ligand alone, INH. Most importantly the complexes are inactive in the dark, showing that the antibacterial ligand is selectively released in vitro after photoirradiation. The complex cis-[Ru(bpy)2(MOPEP)2][PF6]2 (9), where MOPEP is 4-[2-(4-methoxyphenyl)ethynyl]pyridine, was initially designed to study two-photon activation via a femtosecond-pulsed laser. Surprisingly the complex was one-photon active with 600 nm and 800 nm light, due to the MOPEP ligand extending and increasing the intensity of the one-photon absorption band shoulder in the 600-800 nm region.

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Greguric, Antun, University of Western Sydney, of Science Technology and Environment College e of Science Food and Horticulture School. "The DNA binding interactions of Ru(II) polypyridyl complexes". THESIS_CSTE_SFH_Greguric_A.xml, 2002. http://handle.uws.edu.au:8081/1959.7/620.

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This thesis reports on the synthesis, characterisation, enantiomeric resolution, 1H NMR structural study and physical evaluation of a series of certain bidentate ligand metal complexes, where ‘L-L’ denotes the ancillary bidentate ligand and ‘intercalator’ indicates the intercalating bidentate ligand. The L-L series varies in size and shape. Results of many tests and projects conducted are explained in detail.
Master of Science (Hons)

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McDonnell, Ursula J. "Synthesis and DNA Binding of Novel Ruthenium Polypyridyl Complexes". Thesis, University of Warwick, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.526217.

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Yang, Mei. "Iron(II) and ruthenium(II) polypyridyl complexes as photosensitizers". Available to US Hopkins community, 2003. http://wwwlib.umi.com/dissertations/dlnow/3080801.

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Greguric, Antun. "The DNA binding interactions of Ru(II) polypyridyl complexes". Thesis, View thesis View thesis, 2002. http://handle.uws.edu.au:8081/1959.7/620.

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Greguric, Antun. "The DNA binding interactions of Ru(II) polypyridyl complexes /". View thesis View thesis, 2002. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20030410.094714/index.html.

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Thesis (M. Sc.) (Hons.) -- University of Western Sydney, 2002.
A thesis presented to the University of Western Sydney in partial fulfilment of the rquirements for the degree of Master of Science (Honours), February, 2002. Includes bibliographical references.

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Più fonti

Capitoli di libri sul tema "Polypyridyl"

Orkey, Nikita, Paul Wormell e Janice Aldrich-Wright. "Ruthenium Polypyridyl Metallointercalators". In Metallointercalators, 27–67. Vienna: Springer Vienna, 2011. http://dx.doi.org/10.1007/978-3-211-99079-7_2.

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Serpone, N., e M. Z. Hoffman. "Multiphoton-Induced Picosecond Photophysics of Chromium(III)- Polypyridyl Complexes". In Photochemistry and Photophysics of Coordination Compounds, 61–67. Berlin, Heidelberg: Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-642-72666-8_12.

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Gill, Martin R., e Jim A. Thomas. "Targeting cellular DNA with Luminescent Ruthenium(II) Polypyridyl Complexes". In Ruthenium Complexes, 221–38. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2017. http://dx.doi.org/10.1002/9783527695225.ch11.

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Orellana, Guillermo, e David García-Fresnadillo. "Environmental and Industrial Optosensing with Tailored Luminescent Ru(II) Polypyridyl Complexes". In Optical Sensors, 309–57. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-09111-1_13.

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Smeigh, Amanda L., e James K. McCusker. "Ultrafast Dynamics of Fe(II) Polypyridyl Chromophores: Design Implications for Dye-Sensitized Photovoltaics". In Ultrafast Phenomena XV, 273–75. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-68781-8_88.

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Hoffman, M. Z., e N. Serpone. "Excited State Behavior as a Probe of Ground-State Ion-Pair Interactions in Chromium(III)-Polypyridyl Complexes". In Photochemistry and Photophysics of Coordination Compounds, 43–47. Berlin, Heidelberg: Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-642-72666-8_9.

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Srikanth, K., e Manoj K. Mishra. "Role of Electronic Structure of Ruthenium polypyridyl Dyes in the Photoconversion Efficiency of Dye - Sensitized Solar cells: A Semi-Empirical Investigation." In Current Developments in Atomic, Molecular, and Chemical Physics with Applications, 135–41. Boston, MA: Springer US, 2002. http://dx.doi.org/10.1007/978-1-4615-0115-2_18.

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Palmer, Richard A., Pingyun Chen, Susan E. Plunkett e James L. Chao. "Excited State Structure and Relaxation Dynamics of Polypyridyl Complexes of Low Spin d 6 Metal Ions by Means of Step-Scan FTIR Time-Resolved Spectroscopy (S2FT-IR TRS)". In Progress in Fourier Transform Spectroscopy, 595–97. Vienna: Springer Vienna, 1997. http://dx.doi.org/10.1007/978-3-7091-6840-0_149.

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Tsubonouchi, Yuta, Eman A. Mohamed, Zaki N. Zahran e Masayuki Yagi. "Mechanisms of Photoisomerization and Water Oxidation Catalysis of Ruthenium(II) Aquo Complexes". In Ruthenium - an Element Loved by Researchers [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.99730.

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Polypyridyl ruthenium(II) complexes have been widely researched as promising functional molecules. We have found unique photoisomerization reactions of polypyridyl ruthenium(II) aquo complexes. Recently we have attempted to provide insight into the mechanism of the photoisomerization of the complexes and distinguish between the distal−/proximal-isomers in their physicochemical properties and functions. Moreover, polypyridyl ruthenium(II) aquo complexes have been intensively studied as active water oxidation catalysts (WOCs) which are indispensable for artificial photosynthesis. The catalytic aspect and mechanism of water oxidation by the distal-/proximal-isomers of polypyridyl ruthenium(II) aquo complexes have been investigated to provide the guided thought to develop more efficient molecular catalysts for water oxidation. The recent progress on the photoisomerization and water oxidation of polypyridyl ruthenium(II) aquo complexes in our group are reviewed to understand the properties and functions of ruthenium complexes.

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Kumar, Pramod, e Sushil Kumar. "Detection of Bio-Relevant Metal Ions by Luminescent Ru(II)-Polypyridyl Based Sensors". In Ruthenium - an Element Loved by Researchers [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.96453.

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Biorelevant metal ions such as Cu2+ and Fe2+/Fe3+ participate in various biological events which include electron transfer reactions, delivery and uptake of oxygen, DNA and RNA syntheses, and enzymatic catalysis to maintain fundamental physiological processes in living organisms. So far, several analytical techniques have been investigated for their precise detection; however, luminescence-based sensing is often superior due to its high sensitivity, selectivity, fast and easy operation and convenient cellular imaging. Owing to their immense photophysical and photochemical properties stemming from large Stokes shift, absorption in visible region, good photostability and long excited state lifetimes, Ru(II)-polypyridyl-based complexes have gained increasing interest as luminophores. Over past few decades, several Ru(II)-polypyridyl based chemosensors have rapidly been developed for detection of different biorelevant and other metal ions. The main object of this book chapter is to cover a majority of Ru(II)-polypyridyl based chemosensors showing a selective and sensitive detection of bio-relevant Cu2+ and Fe2+/Fe3+ ions. The photophysical properties of Ru(II) complexes, detection of metal ions, sensing mechanism and applications of these sensors are discussed at a length.

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Atti di convegni sul tema "Polypyridyl"

Pong, R. G. S., S. R. Flora, J. S. Shirk, T. V. Duncan e M. J. Therien. "Nonlinear transmission of highly conjugated (polypyridyl)metal-(porphinato)zinc(II) compounds". In 2005 Conference on Lasers and Electro-Optics (CLEO). IEEE, 2005. http://dx.doi.org/10.1109/cleo.2005.202349.

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Durand, Nicolas, Paul Savel, Huriye Akdas-Kilic, Abdou Boucekkine, Jean-Pierre Malval e Jean-Luc Fillaut. "Polypyridyl Ruthenium Complexes: Versatile Tools for Linear and Non-Linear Optics". In 2019 21st International Conference on Transparent Optical Networks (ICTON). IEEE, 2019. http://dx.doi.org/10.1109/icton.2019.8840409.

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Zhang, Ye, Ning Zhou e Bing Xu. "Cell Compatible Polypyridyl Ru-Complex Based Fluorophore as Long-Life Lysosome Tracker". In Biomedical Optics. Washington, D.C.: OSA, 2014. http://dx.doi.org/10.1364/biomed.2014.bt3a.53.

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Gordon, Keith C., Michael G. Fraser, Raphael Horvath, P. M. Champion e L. D. Ziegler. "Resonance Raman Spectroscopy Of Rhenium(I) Complexes With Sulfur-Containing Polypyridyl Ligands". In XXII INTERNATIONAL CONFERENCE ON RAMAN SPECTROSCOPY. AIP, 2010. http://dx.doi.org/10.1063/1.3482689.

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Smeigh, Amanda L., e James K. McCusker. "Ultrafast Dynamics of Fe(II) Polypyridyl Chromophores: Design Implications for Dye-Sensitized Photovoltaics". In International Conference on Ultrafast Phenomena. Washington, D.C.: OSA, 2006. http://dx.doi.org/10.1364/up.2006.wd3.

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Israil, R., L. Schüssler, M. Schmitt, M. Grupe, P. Hütchen, W. R. Thiel, R. Diller e C. Riehn. "Ultrafast Dynamics of RuII-polypyridyl Complexes – Photoinduced Ligand Dissociation Dynamics in Gas Phase and Solution". In International Conference on Ultrafast Phenomena. Washington, D.C.: Optica Publishing Group, 2022. http://dx.doi.org/10.1364/up.2022.tu4a.4.

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Abstract (sommario):

Ultrafast electronic dynamics and UV absorption of [RuII(bipyridine)2(nicotinamide)2]2+ isolated in an ion trap reveal by transient photodissociation short time constants and spectra comparable to transient absorption in solution. Ligand dissociation dynamics are elucidated.

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Handy, Erik S., Erika D. Abbas, Amlan J. Pal e Michael F. Rubner. "Development of the tris-chelated polypyridyl ruthenium (II) complex as a solid state light emitter". In SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, a cura di Zakya H. Kafafi. SPIE, 1998. http://dx.doi.org/10.1117/12.332600.

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Miloradovic, Ivan R., Yuxia Zhao, Kurt Wostyn, Inge Asselberghs, H. T. Uyeda, Andre P. Persoons, Koen J. Clays e Michael J. Therien. "Effect of electronic structure on molecular first hyperpolarizabilities of highly conjugated (polypyridyl)metal-(porphinato)zinc(II) chromophores". In Optical Science and Technology, SPIE's 48th Annual Meeting, a cura di Mark G. Kuzyk, Manfred Eich e Robert A. Norwood. SPIE, 2003. http://dx.doi.org/10.1117/12.509147.

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Premkumar, P., Krishnan Namboori P.K., M. Sathishkumar, K. I. Ramachandran e Deepa Gopakumar. "Quantum Mechanical Modeling and Molecular Dynamic Simulation of Ruthenium (Ru) Polypyridyl Complexes to Study Feasibility of Artificial Photosynthesis". In 2009 International Conference on Advances in Recent Technologies in Communication and Computing. ARTCom 2009. IEEE, 2009. http://dx.doi.org/10.1109/artcom.2009.129.

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Rapporti di organizzazioni sul tema "Polypyridyl"

Steffan, C. Reactions of the excited state of polypyridyl chromium(III) ion. Office of Scientific and Technical Information (OSTI), settembre 1990. http://dx.doi.org/10.2172/6764870.

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