Готові списки джерел за темами / Metal-metal charge transfer

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Автор: Grafiati
Опубліковано: 6 вересня 2023

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Статті в журналах з теми "Metal-metal charge transfer"

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Lind, Thomas, and Hermann Bank. "Effect of Ligand Metal Charge Transfer and Intravalence Charge Transfer Bands on the Colour of Grossular Garnet." Neues Jahrbuch für Mineralogie - Monatshefte 1997, no. 1 (March 26, 1997): 1–14. http://dx.doi.org/10.1127/njmm/1997/1997/1.

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Labadz, A. F., and J. Lowell. "Charge transfer across metal-SiO2interfaces." Journal of Physics D: Applied Physics 24, no. 8 (August 14, 1991): 1416–21. http://dx.doi.org/10.1088/0022-3727/24/8/028.

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Lachinov, A. N., T. G. Zagurenko, V. M. Kornilov, A. I. Fokin, I. V. Aleksandrov, and R. Z. Valiev. "Charge transfer in a metal-polymer-nanocrystalline metal system." Physics of the Solid State 42, no. 10 (October 2000): 1935–41. http://dx.doi.org/10.1134/1.1318890.

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Akande, A. R., and J. Lowell. "Charge transfer in metal/polymer contacts." Journal of Physics D: Applied Physics 20, no. 5 (May 14, 1987): 565–78. http://dx.doi.org/10.1088/0022-3727/20/5/002.

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Liu, Tao, Yan-Juan Zhang, Shinji Kanegawa, and Osamu Sato. "Photoinduced Metal-to-Metal Charge Transfer toward Single-Chain Magnet." Journal of the American Chemical Society 132, no. 24 (June 23, 2010): 8250–51. http://dx.doi.org/10.1021/ja1027953.

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Zhao, Jianjun, Matthias Wasem, Christopher R. Bradbury, and David J. Fermín. "Charge Transfer across Self-Assembled Nanoscale Metal−Insulator−Metal Heterostructures." Journal of Physical Chemistry C 112, no. 18 (April 15, 2008): 7284–89. http://dx.doi.org/10.1021/jp7101644.

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Glass, Elliot N., John Fielden, Zhuangqun Huang, Xu Xiang, Djamaladdin G. Musaev, Tianquan Lian, and Craig L. Hill. "Transition Metal Substitution Effects on Metal-to-Polyoxometalate Charge Transfer." Inorganic Chemistry 55, no. 9 (April 15, 2016): 4308–19. http://dx.doi.org/10.1021/acs.inorgchem.6b00060.

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Chisholm, Malcolm H. "Charge distribution in metal to ligand charge transfer states of quadruply bonded metal complexes." Coordination Chemistry Reviews 282-283 (January 2015): 60–65. http://dx.doi.org/10.1016/j.ccr.2014.03.034.

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Jiang, Wenjing, Chengqi Jiao, Yinshan Meng, Liang Zhao, Qiang Liu, and Tao Liu. "Switching single chain magnet behaviorviaphotoinduced bidirectional metal-to-metal charge transfer." Chemical Science 9, no. 3 (2018): 617–22. http://dx.doi.org/10.1039/c7sc03401f.

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Rogers, David M., and J. Olof Johansson. "Metal-to-metal charge-transfer transitions in Prussian blue hexacyanochromate analogues." Materials Science and Engineering: B 227 (January 2018): 28–38. http://dx.doi.org/10.1016/j.mseb.2017.10.003.

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Дисертації з теми "Metal-metal charge transfer"

1

Schirra, Laura Kristy. "Charge Transfer at Metal Oxide/Organic Interfaces." Diss., The University of Arizona, 2012. http://hdl.handle.net/10150/217090.

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Interfacial charge transfer between metal oxides and organic semiconductors has been found to limit the efficiency of organic optoelectronic devices. Although a number of investigations of inorganic/organic systems exist, very few generally applicable rules for oxide/organic interfaces have been developed and many questions about these systems remain unanswered. Thus the studies presented in this dissertation were designed to improve the understanding of the fundamental interface physics of metal oxide/organic systems. Single molecule fluorescence microscopy was employed to determine the charge transfer mechanism while photoelectron spectroscopy was used to determine the energy level alignment of model systems. Additional computational studies allowed the examination of the properties of the charged organic molecules involved in charge transfer and modeling of the molecule-surface interaction. Calculations of the ground state properties and excited state transitions of the neutral and singly charged states of a modified perylene molecule were performed to provide insight into the orbitals of the initial and final states involved in the interfacial charge transfer process. The design and implementation of a novel UHV single molecule microscope is described. This microscope was used to observe the excited state charge transfer between a modified perylene molecule and Al₂O₃ (0001). The charge transfer mechanism was identified as involving activated trapping and detrapping of the defect derived states within the Al₂O₃ band gap, which resulted in the observation of strongly distributed kinetics for this system. The influence of defects and adsorbates on the electronic structure of ZnO and its interface with organic semiconductors was determined from photoelectron spectroscopy. Modified perylene molecules were found to have strong chemisorptive interactions with the ZnO surface involving charge transfer from defect derived ZnO states to the LUMO, while magnesium phthalocyanine molecules appear to have only weak physisorptive interactions with the ZnO surface. The interfacial investigations of the organic/oxide systems demonstrate the rich defect structure present in metal oxides. In both cases, defects were found to control the interfacial interactions between the metal oxide surface and the modified perylene molecules. Thus the manipulation of these defects states is of fundamental importance for optoelectronic device design.
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Gregory, David. "Charge transfer studies of alkali-metal/semiconductor interfaces." Thesis, University of Liverpool, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240051.

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Siles, P. F., T. Hahn, G. Salvan, M. Knupfer, F. Zhu, D. R. T. Zahn, and O. G. Schmidt. "Tunable charge transfer properties in metal-phthalocyanine heterojunctions." Universitätsbibliothek Chemnitz, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-219903.

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Organic materials such as phthalocyanine-based systems present a great potential for organic device applications due to the possibility of integrating films of different organic materials to create organic heterostructures which combine the electrical capabilities of each material. This opens the possibility to precisely engineer and tune new electrical properties. In particular, similar transition metal phthalocyanines demonstrate hybridization and charge transfer properties which could lead to interesting physical phenomena. Although, when considering device dimensions, a better understanding and control of the tuning of the transport properties still remain in the focus of research. Here, by employing conductive atomic force microscopy techniques, we provide an insight about the nanoscale electrical properties and transport mechanisms of MnPc and fluorinated phthalocyanines such as F16CuPc and F16CoPc. We report a transition from typical diode-like transport mechanisms for pure MnPc thin films to space-charge-limited current transport regime (SCLC) for Pc-based heterostructures. The controlled addition of fluorinated phthalocyanine also provides highly uniform and symmetric-polarized transport characteristics with conductance enhancements up to two orders of magnitude depending on the polarization. We present a method to spatially map the mobility of the MnPc/F16CuPc structures with a nanoscale resolution and provide theoretical calculations to support our experimental findings. This well-controlled nanoscale tuning of the electrical properties for metal transition phthalocyanine junctions stands as key step for future phthalocyanine-based electronic devices, where the low dimension charge transfer, mediated by transition metal atoms could be intrinsically linked to a transfer of magnetic moment or spin
Dieser Beitrag ist aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich
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Rusu, Paul Constantin. "Charge transfer and dipole formation at metal-organic interfaces." Enschede : University of Twente [Host], 2007. http://doc.utwente.nl/58034.

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Ding, Bowen. "Localised Charge Transfer in Metal-Organic Frameworks for Catalysis." Thesis, The University of Sydney, 2018. http://hdl.handle.net/2123/19852.

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In natural photosynthetic systems localised charge transfer (CT) interactions are employed to prolong photoexcited charge separated states, facilitating conversion to chemical energy. This thesis explores localised CT in redox-active Metal-Organic Frameworks (MOFs) for applications in electrocatalysis and photoelectrocatalysis. Two design strategies are adopted, the first of which incorporates cofacial dimeric units of the photo- and redox-active N,Nʹ-di(4-pyridyl)-1,4,5,8-naphthalenediimide (DPNDI) ligand into a Cd(II) MOF. Crystallographic characterisation of the structural flexibility in this MOF was achieved and linked to an enhanced capability for the MOF to stabilise photoexcited and radical states through localised Intervalence CT interactions. The ability of the material to stabilise the NDI photoexcited radical monoanion state (redox potential -2.1 V vs. SCE) was capitalised on to reduce a discrete organometallic Re(I) based CO2 electrocatalyst to its catalytically active form. Photoelectrocatalytic conversion of CO2 to CO was confirmed at modest reduction potentials of -1.2 V vs. Ag/Ag+. The second approach adopted in this project was the incorporation of the Ni bisdithiolene redox-active unit into a Zn(II) MOF, in the form of the [Ni(pedt)2]- metalloligand (where pedt represents 1-(pyridine-4-yl)ethylene-1,2-dithiolate). The combination of Zn(II) nodes and carboxylate co-ligand coordination resulted in effective electronic isolation of each [Ni(pedt)2]- ligand. The Ni bisdithiolene MOF was successfully applied as a heterogeneous proton reduction electrocatalyst under acidic conditions of 90 mM CH3COOH in 0.1 M [n-Bu4N]PF6/MeCN electrolyte. Tafel analysis of the electrocatalytic behaviour of both the ligand in solution and the MOF demonstrated similarities in catalytic mechanism, evidencing the conservation of molecular electrocatalytic behaviour.
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Newton, Angus William. "Charge transfer and disorder broadening in disordered transition metal alloys." Thesis, University of Liverpool, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.343931.

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Cai, Meng. "Investigation of Charge Transfer in Metal-Organic Frameworks for Electrochemical Applications." Diss., Virginia Tech, 2020. http://hdl.handle.net/10919/97400.

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High-performance functional electrode materials are critical for the development of electrochemical energy conversion and storage technologies. Among various advanced materials, three-dimensional (3D) porous structures have attracted extensive interest due to their high surface area and capability for efficient mass transport. Metal-organic frameworks (MOFs) are a novel class of porous coordination polymers constructed with organic linkers connected by inorganic nodes. Their extraordinarily high surface area, permanent pores/channels, good thermal and chemical stabilities have made MOFs one of the most promising materials for various electrochemical applications, including electrocatalysis, supercapacitors, Lithium-ion batteries, chemical sensors, etc. The present dissertation focuses on the investigation of charge transfer mechanism in MOF films so as to establish design rules for future MOF design, and the exploration of MOF-based materials for electrochemical and photoelectrochemical applications. To promote the use of MOF-based materials in electrochemical applications, efficient charge transfer is a necessity. In redox-active MOFs, charge transfer can happen through redox hopping, i.e. site-to-site electron hopping coupled to diffusion of counter ions to balance electroneutrality. While the apparent diffusion coefficient (Dapp) has been employed to describe the overall charge transfer efficiency, independent elucidation of electron and ion diffusion is crucial for providing insights into the mechanism of charge transfer in MOFs. In Chapter 2, we investigated the MOF pore size effect on electron and ion diffusion. Three redox-active ferrocene-doped MOF (Fc-MOF) films with different pore sizes immobilized on conductive substrates were prepared, and electron and ion diffusion coefficients and rate constants were quantified by applying a theoretical model to chronoamperometric responses. Increasing MOF pore size led to an increase in ion diffusion rate constant and a decrease in electron diffusion rate constant. The overall charge transfer rate constant increased when MOF pore size increased, implying the ability of promoting efficient charge transfer through control of MOF pore size. As charge transfer via redox hopping proved to be feasible, Chapter 3 focused on the application of a ruthenium(II)-polypyridyl doped MOF film immobilized on a conductive substrate, UiO-67-Ru@FTO, for solid-state electrochemiluminescence (ECL). In the presence of tripropylamine as a coreactant, UiO-67-Ru@FTO exhibited higher ECL intensity and better reproducibility compared to corresponding solution-based ECL system. Subsequently, UiO-67-Ru@FTO was successfully used for dopamine detection, highlighting the great potential of using MOF-based materials as solid-state ECL detector for practical applications. Covalent-organic frameworks (COFs) are a recently emerging family of crystalline organic polymers constructed with organic building blocks linked by covalent bonds. In addition to advantages including high surface area and high porosity that are similar to MOFs, COFs possess low density due to the constitution of light-weighted elements and excellent stability owing to the robust covalent bonds. Therefore, it is of our interest to investigate the properties and potential applications of COFs. Two-dimensional (2D) COFs are composed of conjugated organic layers stacked via - interactions. Chapter 4 focused on understanding the effects of intraplanar -conjugation and interplanar -stacking on the photophysical properties of a 2D COF, TpBpy. Compared to the two building blocks, TpBpy exhibited a red-shifted emission, due to the - stacking. Density functional theory (DFT) calculations were performed on energies of the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO). It was found that the extended structure of the framework resulted in a decrease in the HOMO-LUMO gap. The experimental and computational studies reveal the important influence of intraplanar and interplanar interactions on photophysical properties in 2D COFs. In Chapter 5, we modified the COF TpBpy with nickel(II) and investigated its application as an electrocatalyst for 5-hydroxymethylfufural (HMF) oxidation. Unlike TpBpy characterized in Chapter 4, TpBpy thin films were prepared by an interfacial crystallization strategy. The films were transferred to conductive substrates and then post-synthetically modified by nickel acetate. Similar to redox-active MOFs, the resulting TpBpy-Ni COF film exhibited redox conductivity. TpBpy-Ni showed good catalytic activity for HMF oxidation under basic conditions. This study suggests the great potential of functionalized COFs for electrochemical applications.
Doctor of Philosophy
The increasing demand for clean and efficient energy has triggered a great deal of research interest in developing novel energy conversion and storage technologies. In particular, electrochemical (EC) systems including supercapacitors, Lithium-ion batteries, artificial photosynthetic system, fuel cells, etc. have drawn significant attention. The key component in high-performance EC energy conversion and storage devices is the functional electrode materials. Three-dimensional (3D) porous nanostructures have been widely applied as advanced electrode materials due to their high surface area that enables more liquid/solid interfacial interactions, and pores/channels that allows efficient mass diffusion and transport. Metal-organic frameworks (MOFs), made of organic ligands bridged by inorganic nodes, are a novel kind of porous materials with extraordinarily high surface area and permanent porosity. As a result, there is great potential in developing MOF-based electrode materials for EC applications. As the name itself suggests, EC systems rely on electrochemical reactions that involve transfer of charges (i.e. electrons and ions). Therefore, efficient charge transfer is vital for achieving high performance. While MOFs used for gas separation and storage have been reported, their electrochemical applications are still in early stages. The fundamental understanding of charge transfer in MOFs is in its infancy. As a result, there is an urgent demand for understanding the nature of charge transfer in MOFs. In this dissertation, we investigated the mechanism of charge transfer by independent quantification of electron and ion transfer rate constants. With a better understanding in hand, we also explored two electrochemical applications in MOFs, electrocatalysis and electrogenerated chemiluminescence.
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唐素明 and So-ming Glenna Tong. "Theoretical studies of transition metal containing diatomics and DNA electron transfer." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2002. http://hub.hku.hk/bib/B31244828.

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Forker, Roman. "Electronic Coupling Effects and Charge Transfer between Organic Molecules and Metal Surfaces." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-26163.

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We employ a variant of optical absorption spectroscopy, namely in situ differential reflectance spectroscopy (DRS), for an analysis of the structure-properties relations of thin epitaxial organic films. Clear correlations between the spectra and the differently intense coupling to the respective substrates are found. While rather broad and almost structureless spectra are obtained for a quaterrylene (QT) monolayer on Au(111), the spectral shape resembles that of isolated molecules when QT is grown on graphite. We even achieve an efficient electronic decoupling from the subjacent Au(111) by inserting an atomically thin organic spacer layer consisting of hexa-peri-hexabenzocoronene (HBC) with a noticeably dissimilar electronic behavior. These observations are further consolidated by a systematic variation of the metal substrate (Au, Ag, and Al), ranging from inert to rather reactive. For this purpose, 3,4,9,10-perylenetetracarboxylic dianhydride (PTCDA) is chosen to ensure comparability of the molecular film structures on the different metals, and also because its electronic alignment on various metal surfaces has previously been studied with great intensity. We present evidence for ionized PTCDA at several interfaces and propose the charge transfer to be related to the electronic level alignment governed by interface dipole formation on the respective metals
Zur Analyse der Struktur-Eigenschafts-Beziehungen dünner, epitaktischer Molekülfilme wird in situ differentielle Reflexionsspektroskopie (DRS) als Variante der optischen Absorptionsspektroskopie verwendet. Klare Zusammenhänge zwischen den Spektren und der unterschiedlich starken Kopplung zum jeweiligen Substrat werden gefunden. Während man breite und beinahe unstrukturierte Spektren für eine Quaterrylen (QT) Monolage auf Au(111) erhält, ist die spektrale Form von auf Graphit abgeschiedenem QT ähnlich der isolierter Moleküle. Durch Einfügen einer atomar dünnen organischen Zwischenschicht bestehend aus Hexa-peri-hexabenzocoronen (HBC) mit einem deutlich unterschiedlichen elektronischen Verhalten gelingt sogar eine effiziente elektronische Entkopplung vom darunter liegenden Au(111). Diese Ergebnisse werden durch systematische Variation der Metallsubstrate (Au, Ag und Al), welche von inert bis sehr reaktiv reichen, untermauert. Zu diesem Zweck wird 3,4,9,10-Perylentetracarbonsäuredianhydrid (PTCDA) gewählt, um Vergleichbarkeit der molekularen Filmstrukturen zu gewährleisten, und weil dessen elektronische Anordnung auf verschiedenen Metalloberflächen bereits eingehend untersucht worden ist. Wir weisen ionisiertes PTCDA an einigen dieser Grenzflächen nach und schlagen vor, dass der Ladungsübergang mit der elektronischen Niveauanpassung zusammenhängt, welche mit der Ausbildung von Grenzflächendipolen auf den entsprechenden Metallen einhergeht
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Chun, Young Tea. "Charge transfer characteristic of zinc oxide nanowire devices and their applications." Thesis, University of Cambridge, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.708978.

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Книги з теми "Metal-metal charge transfer"

1

Ardelean, Jenny V. Optical Characterization of Charge Transfer Excitons in Transition Metal Dichalcogenide Heterostructures. [New York, N.Y.?]: [publisher not identified], 2019.

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2

Krumbein, Ulrich. Simulation of carrier generation in advanced silicon devices. Konstanz: Hartung-Gorre, 1996.

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3

Anderson, Kim A. Kinetics of outer-sphere electron transfer reactions in non-aqueous solvents. 1989.

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4

Gribble, Jacquelin D. Kinetics of outer-sphere electron transfer reactions in non-aqueous solutions. 1989.

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5

Launay, Jean-Pierre, and Michel Verdaguer. The excited electron: photophysical properties. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198814597.003.0004.

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After a review of fundamental notions such as absorption, emission and the properties of excited states, the chapter introduces excited-state electron transfer. Several examples are given, using molecules to realize photodiodes, light emitting diodes, photovoltaic cells, and even harnessing photochemical energy for water photolysis. The specificities of ultrafast electron transfer are outlined. Energy transfer is then defined, starting from its theoretical description, and showing its involvement in photonic wires or molecular assemblies realizing an antenna effect for light harvesting. Photomagnetic effects; that is, the modification of magnetic properties after a photonic excitation, are then studied. The examples are taken from systems presenting a spin cross-over, with the LIESST effect, and from systems presenting metal–metal charge transfer, in particular in Prussian Blue analogues and their molecular version.
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Huster, Carl R. A parallel/vector Monte Carlo MESFET model for shared memory machines. 1992.

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Частини книг з теми "Metal-metal charge transfer"

1

Stufkens, D. J., A. Oskam, and M. W. Kokkes. "Metal-Ligand Charge Transfer Photochemistry." In ACS Symposium Series, 66–84. Washington, DC: American Chemical Society, 1986. http://dx.doi.org/10.1021/bk-1986-0307.ch006.

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2

Fialko, N. S., and V. D. Lakhno. "Charge Transfer in DNA-Metal-Ligand Complexes. Polynucleotides." In Metal-Ligand Interactions, 453–59. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-010-0191-5_20.

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Lakhno, V. D. "Charge Transfer in DNA-Metal-Ligand Complexes. Oligonucleotides." In Metal-Ligand Interactions, 571–84. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-010-0191-5_24.

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Kaim, W., F. M. Hornung, R. Schäfer, J. Fiedler, M. Krejcik, and S. Zališ. "Charge Transfer Phenomena in Transition Metal Sulphur Chemistry." In Transition Metal Sulphides, 37–55. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-017-3577-3_2.

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Luo, Zhixun, and Shiv N. Khanna. "Charge Transfer and the Harpoon Mechanism." In Metal Clusters and Their Reactivity, 193–213. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-9704-6_12.

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Vogler, A., and H. Kunkely. "Charge Transfer Excitation of Coordination Compounds. Generation of Reactive Intermediates." In Catalysis by Metal Complexes, 71–111. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-017-2626-9_4.

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Chen, Anthony L., and Peter Y. Yu. "Charge-Transfer Gap Closure in Transition-Metal Halides Under Pressure." In The Kluwer International Series in Engineering and Computer Science, 349–61. Boston, MA: Springer US, 1996. http://dx.doi.org/10.1007/978-1-4613-0461-6_25.

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Geyer, W., Th Ochs, C. Krummel, M. Fleischer, H. Meixner, and D. Kohl. "Surface Reactions at Metal Oxides: Relaxation Spectroscopy and Charge Transfer." In Advanced Gas Sensing - The Electroadsorptive Effect and Related Techniques, 41–53. Boston, MA: Springer US, 2003. http://dx.doi.org/10.1007/978-1-4419-8612-2_2.

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Dutton, Gregory, and X. Y. Zhu. "Charge Transfer at Molecule—Metal Interfaces: Implication for Molecular Electronics." In ACS Symposium Series, 76–86. Washington, DC: American Chemical Society, 2003. http://dx.doi.org/10.1021/bk-2003-0844.ch007.

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10

Loukova, Galina V. "Ligand-to-Metal Charge Transfer Excited States in Organometallic Compounds." In Springer Handbook of Inorganic Photochemistry, 459–92. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-63713-2_19.

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Тези доповідей конференцій з теми "Metal-metal charge transfer"

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PHILLIPS, D. L., K. H. LEUNG, C. M. CHE, M. C. TSE, and V. M. MISKOWSKI. "RESONANCE RAMAN INVESTIGATION OF METAL-METAL BONDING INTERACTIONS IN METAL-METAL CHARGE TRANSFER TRANSITIONS OF DINUCLEAR INORGANIC COMPLEXES." In Proceedings of the Third Joint Meeting of Chinese Physicists Worldwide. WORLD SCIENTIFIC, 2002. http://dx.doi.org/10.1142/9789812776785_0071.

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Schmuttenmaer, C. A., J. Cao, M. A. Aeschlimann, H. E. Elsayed-Ali, Y. Gao, R. J. D. Miller, and D. A. Mantell. "Photoexcited charge transfer to adsorbates at metal surfaces." In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1993. http://dx.doi.org/10.1364/oam.1993.thddd.4.

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There are a number of competing models to explain the photochemistry of molecules at metal surfaces induced by short laser pulses. In order to distinguish between these models more needs to be known about the dynamics of excited carriers and how they interact with adsorbed molecules.
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Saito, Yoko, Mariko Miyazaki, Tomio Iwasaki, Naoya Sasaki, Hongmei Jin, Michael B. Sullivan, and Ping Wu. "Force-field with Charge Transfer and Classical Molecular Dynamics Study for Metal-/Metal Oxide/Polyimide Interfaces." In 2008 MRS Fall Meetin. Materials Research Society, 2008. http://dx.doi.org/10.1557/proc-1115-h08-02.

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Jece, Annija, Armands Ruduss, Kitija A. Štucere, Aivars Vembris, and Kaspars Traskovskis. "TADF active carbene-metal-amide complexes exhibiting through-space charge transfer: an impact of metal atom." In Organic Electronics and Photonics: Fundamentals and Devices III, edited by Sebastian Reineke, Koen Vandewal, and Wouter Maes. SPIE, 2022. http://dx.doi.org/10.1117/12.2621156.

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Orman, L. K., D. R. Anderson, and J. B. Hopkins. "Direct structural characterization of charge localization in metal to ligand charge transfer complexes." In AIP Conference Proceedings Volume 172. AIP, 1988. http://dx.doi.org/10.1063/1.37523.

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Castaing, V., L. Li, D. Rytz, Y. Katayama, A. D. Sontakke, S. Tanabe, M. Peng, and B. Viana. "Metal-to-metal charge transfer band position control and luminescence quenching by cationic substitution in NaNbO3:Pr3+." In SPIE OPTO, edited by Shibin Jiang and Michel J. F. Digonnet. SPIE, 2017. http://dx.doi.org/10.1117/12.2253177.

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Stefancu, Andrei, Seunghoon Lee, Zhu Li, Min Liu, Raluca Ciceo-Lucacel, Nicolae Leopold, and Emiliano Cortes. "Metal-molecule charge transfer through Fermi level equilibration in plasmonic systems." In 2021 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC). IEEE, 2021. http://dx.doi.org/10.1109/cleo/europe-eqec52157.2021.9542635.

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Zhao, Lianfeng, YunHui L. Lin, and Barry P. Rand. "Charge-transfer states at 2D metal halide perovskite/organic heterojunctions (Conference Presentation)." In Physical Chemistry of Semiconductor Materials and Interfaces XVII, edited by Hugo A. Bronstein and Felix Deschler. SPIE, 2018. http://dx.doi.org/10.1117/12.2320314.

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Sieland, Fabian, Jenny Schneider, Thorsten Lippmann, and Detlef W. Bahnemann. "Understanding charge transfer processes on metal oxides: a laser-flash-photolysis study." In SPIE Optics + Photonics for Sustainable Energy, edited by Chung-Li Dong. SPIE, 2016. http://dx.doi.org/10.1117/12.2239261.

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Noel, Nakita K. "Interfacial Charge-transfer Doping of Metal Halide Perovskites for High Performance Optoelectronics." In 11th International Conference on Hybrid and Organic Photovoltaics. València: Fundació Scito, 2019. http://dx.doi.org/10.29363/nanoge.hopv.2019.091.

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Звіти організацій з теми "Metal-metal charge transfer"

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Baker, Lawrence Robert. Charge Transfer and Catalysis at the Metal Support Interface. Office of Scientific and Technical Information (OSTI), July 2012. http://dx.doi.org/10.2172/1174166.

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Chen, A. L., and P. Y. Yu. Charge-transfer gap closure in transition-metal halides under pressure. Office of Scientific and Technical Information (OSTI), January 1995. http://dx.doi.org/10.2172/69161.

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Chen, Anthony Li-Chung. Metallization and charge-transfer gap closure of transition-metal iodides under pressure. Office of Scientific and Technical Information (OSTI), May 1993. http://dx.doi.org/10.2172/10182378.

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Armstrong, Neal, S. Scott Saavedra, and Jeffrey Pyun. Metal-Tipped and Electrochemically Wired Semiconductor Nanocrystals: Modular Constructs for Directed Charge Transfer. Office of Scientific and Technical Information (OSTI), August 2022. http://dx.doi.org/10.2172/1882419.

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Barefoot, Susan F., Bonita A. Glatz, Nathan Gollop, and Thomas A. Hughes. Bacteriocin Markers for Propionibacteria Gene Transfer Systems. United States Department of Agriculture, June 2000. http://dx.doi.org/10.32747/2000.7573993.bard.

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The antibotulinal baceriocins, propionicin PLG-1 and jenseniin G., were the first to be identified, purified and characterized for the dairy propionibaceria and are produced by Propionibacterium thoenii P127 and P. thoenii/jensenii P126, respectively. Objectives of this project were to (a) produce polyclonal antibodies for detection, comparison and monitoring of propionicin PLG-1; (b) identify, clone and characterize the propionicin PLG-1 (plg-1) and jenseniin G (jnG) genes; and (3) develop gene transfer systems for dairy propionibacteria using them as models. Polyclonal antibodies for detection, comparison and monitoring of propionicin PLG-1 were produced in rabbits. Anti-PLG-1 antiserum had high titers (256,000 to 512,000), neutralized PLG-1 activity, and detected purified PLG-1 at 0.10 mg/ml (indirect ELISA) and 0.033 mg/ml (competitive indirect ELISA). Thirty-nine of 158 strains (most P. thoenii or P. jensenii) yielded cross-reacting material; four strains of P. thoenii, including two previously unidentified bacteriocin producers, showed biological activity. Eight propionicin-negative P127 mutants produced neither ELISA response nor biological activity. Western blot analyses of supernates detected a PLG-1 band at 9.1 kDa and two additional protein bands with apparent molecular weights of 16.2 and 27.5 kDa. PLG-1 polyclonal antibodies were used for detection of jenseniin G. PLG-1 antibodies neutralized jenseniin G activity and detected a jenseniin G-sized, 3.5 kDa peptide. Preliminary immunoprecipitation of crude preparations with PLG-1 antibodies yielded three proteins including an active 3-4 kDa band. Propionicin PLG-1 antibodies were used to screen a P. jensenii/thoenii P126 genomic expression library. Complete sequencing of a cloned insert identified by PLG-1 antibodies revealed a putative response regulator, transport protein, transmembrane protein and an open reading frame (ORF) potentially encoding jenseniin G. PCR cloning of the putative plg-1 gene yielded a 1,100 bp fragment with a 355 bp ORF encoding 118 amino acids; the deduced N-terminus was similar to the known PLG-1 N-terminus. The 118 amino acid sequence deduced from the putative plg-1 gene was larger than PLG-1 possibly due to post-translational processing. The product of the putative plg-1 gene had a calculated molecular weight of 12.8 kDa, a pI of 11.7, 14 negatively charged residues (Asp+Glu) and 24 positively charged residues (Arg+Lys). The putative plg-1 gene was expressed as an inducible fusion protein with a six-histidine residue tag. Metal affinity chromatography of the fused protein yielded a homogeneous product. The fused purified protein sequence matched the deduced putative plg-1 gene sequence. The data preliminarily suggest that both the plg-1 and jnG genes have been identified and cloned. Demonstrating that antibodies can be produced for propionicin PLG-1 and that those antibodies can be used to detect, monitor and compare activity throughout growth and purification was an important step towards monitoring PLG-1 concentrations in food systems. The unexpected but fortunate cross-reactivity of PLG-1 antibodies with jenseniin G led to selective recovery of jenseniin G by immunoprecipitation. Further refinement of this separation technique could lead to powerful affinity methods for rapid, specific separation of the two bacteriocins and thus facilitate their availability for industrial or pharmaceutical uses. Preliminary identification of genes encoding the two dairy propionibacteria bacteriocins must be confirmed; further analysis will provide means for understanding how they work, for increasing their production and for manipulating the peptides to increase their target species. Further development of these systems would contribute to basic knowledge about dairy propionibacteria and has potential for improving other industrially significant characteristics.
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Hodul, M., H. P. White, and A. Knudby. A report on water quality monitoring in Quesnel Lake, British Columbia, subsequent to the Mount Polley tailings dam spill, using optical satellite imagery. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/330556.

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In the early morning on the 4th of August 2014, a tailings dam near Quesnel, BC burst, spilling approximately 25 million m3 of runoff containing heavy metal elements into nearby Quesnel Lake (Byrne et al. 2018). The runoff slurry, which included lead, arsenic, selenium, and vanadium spilled through Hazeltine Creek, scouring its banks and picking up till and forest cover on the way, and ultimately ended up in Quesnel Lake, whose water level rose by 1.5 m as a result. While the introduction of heavy metals into Quesnel Lake was of environmental concern, the additional till and forest cover scoured from the banks of Hazeltine Creek added to the lake has also been of concern to salmon spawning grounds. Immediate repercussions of the spill involved the damage of sensitive environments along the banks and on the lake bed, the closing of the seasonal salmon fishery in the lake, and a change in the microbial composition of the lake bed (Hatam et al. 2019). In addition, there appears to be a seasonal resuspension of the tailings sediment due to thermal cycling of the water and surface winds (Hamilton et al. 2020). While the water quality of Quesnel Lake continues to be monitored for the tailings sediments, primarily by members at the Quesnel River Research Centre, the sample-and-test methods of water quality testing used, while highly accurate, are expensive to undertake, and not spatially exhaustive. The use of remote sensing techniques, though not as accurate as lab testing, allows for the relatively fast creation of expansive water quality maps using sensors mounted on boats, planes, and satellites (Ritchie et al. 2003). The most common method for the remote sensing of surface water quality is through the use of a physics-based semianalytical model which simulates light passing through a water column with a given set of Inherent Optical Properties (IOPs), developed by Lee et al. (1998) and commonly referred to as a Radiative Transfer Model (RTM). The RTM forward-models a wide range of water-leaving spectral signatures based on IOPs determined by a mix of water constituents, including natural materials and pollutants. Remote sensing imagery is then used to invert the model by finding the modelled water spectrum which most closely resembles that seen in the imagery (Brando et al 2009). This project set out to develop an RTM water quality model to monitor the water quality in Quesnel Lake, allowing for the entire surface of the lake to be mapped at once, in an effort to easily determine the timing and extent of resuspension events, as well as potentially investigate greening events reported by locals. The project intended to use a combination of multispectral imagery (Landsat-8 and Sentinel-2), as well as hyperspectral imagery (DESIS), combined with field calibration/validation of the resulting models. The project began in the Autumn before the COVID pandemic, with plans to undertake a comprehensive fieldwork campaign to gather model calibration data in the summer of 2020. Since a province-wide travel shutdown and social distancing procedures made it difficult to carry out water quality surveying in a small boat, an insufficient amount of fieldwork was conducted to suit the needs of the project. Thus, the project has been put on hold, and the primary researcher has moved to a different project. This document stands as a report on all of the work conducted up to April 2021, intended largely as an instructional document for researchers who may wish to continue the work once fieldwork may freely and safely resume. This research was undertaken at the University of Ottawa, with supporting funding provided by the Earth Observations for Cumulative Effects (EO4CE) Program Work Package 10b: Site Monitoring and Remediation, Canada Centre for Remote Sensing, through the Natural Resources Canada Research Affiliate Program (RAP).
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FINITE ELEMENT SIMULATION FOR ULTRA-HIGH-PERFORMANCE CONCRETE-FILLED DOUBLE-SKIN TUBES EXPOSED TO FIRE. The Hong Kong Institute of Steel Construction, August 2022. http://dx.doi.org/10.18057/icass2020.p.263.

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Ultra-high-performance concrete (UHPC) or ultra-high-strength concrete (UHSC) are alternatively used to reduce construction materials, thereby achieving more sustainable constructions. Moreover, engaging the advantages of concrete cores and outer steel tubes in concrete-filled steel tubes (CFST) or ductile concrete-filled double-skin tubes (CFDST) is of great interest for the better performance of such members under fire. Nevertheless, current design provisions do not provide design models for UHPC-filled double-skin tubes under fire, and existing finite-element (FE) methodologies available in the literature may not accurately simulate the behaviour of CFDST exposed to fire. Therefore, this paper develops a comprehensive FE protocol implementing the scripting technique to model CFDST members for heat transfer and coupled (simultaneously or sequentially) thermal-stress analyses. Various modelling parameters incorporated in the proposed FE routine include the cross-sectional geometry (circular, elliptical, hexagonal, octagonal, and rectangular), the size (width, diameter, and wall thickness), interactions, meshing, thermal- and mechanical-material properties, and boundary conditions. The detailed algorithm for heat transfer analysis is presented and elaborated via a flow chart. Validations, verifications, and robustness of the developed FE models are established based on extensive comparison studies with existing fire tests available in the literature. As a result, and to recognize the value of the current FE methodology, an extensive parametric study is conducted for different affecting parameters (e.g., nominal steel ratio, hollowness ratio, concrete cylindrical strength, yield strength of metal tubes, and width-to-thickness ratio). Extensive FE results are used for optimizing the fire design of such members. Consequently, a simplified and accurate analytical model that can provide the axial load capacity of CFDST columns under different fire ratings is presented
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The Competitive Advantage of Nations: A Successful Experience, Realigning the Strategy to Transform the Economic and Social Development of the Basque Country. Universidad de Deusto, 2015. http://dx.doi.org/10.18543/xiqr3861.

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Why do the new economy and welfare societies recommend a new station on the long journey towards competitiveness initiated within the framework of “The Competitive Advantage of Nations”, published as long as 25 years ago? A little more than twenty-five years ago, the Basque Country decided to equip itself with its own development strategy, undertaking to meet the challenge of designing its own future. The Basque Country aspired to give itself the maximum degree of self-government as a nation without a State, following its release from a long dictatorship which had plunged it into autarchy and isolation from the Western democracies around it, limiting its ability and responsibility to shape its own destiny and to offer its Society the highest standards of welfare, facing one of the greatest economic, political and social crises of its history and suffering from the ravages of terrorism within an economy castigated by soaring unemployment above 25%, a drop in its GDP, the fall, like dominoes, of its key industrial sectors, locked into the monoculture of the steel and metal working industry, outside the Europe which was being constructed by the then Economic Community of the Six, marginalized as a peripheral area from the future axis and development of the so-called “blue banana” of the London-Milan backbone and with an incipient and inexperienced administration, full of youth and enthusiasm, and a business world undergoing conversion, learning to live with a trade union phenomenon that the former dictatorship had bypassed. Faced with this complex and exciting challenge, those of us who had the privilege of addressing the aforementioned proposal, interpreting (by means of our analyses, as well as the wish to make our desires and dreams come true) the main keys to explain the state of the world economy, the main trends of change and their foreseeable impact on the Basque economy (“What the world economy taught us”), began the task of defining what we call “A strategy for the modernization and internationalization of our economy and our Country” trying to give some meaning to the role expected of the new players (States, city-regions, provinces, etc.), a role in which our small Country, with features of a City-Region, a sub-national entity, an invertebrate area on the two sides of the Pyrenees, could assume the figure of co-protagonist and provide society with a prosperous future. We also needed the framework and tools desirable for tackling the success strategy. We identified the gap between the needs that would be generated by the new paradigms and the tools offered by the existing political-economic framework (contents, skills, potential developments), accompanied by our own Country-strategy, with special emphasis on the initiatives, factors and critical vectors our society would demand and its aspirations for well-being and development. Within this context, the Basque Government approached Michael E. Porter, his ideas and concepts of the moment, and we began a collaborative process (which lasts until this day), constructing much more than our “Competitive Advantage of the Basque Country” in a thrilling and unfinished “Journey towards Competitiveness and Prosperity”. The Basque Country enjoys the privilege of having been the first nation to apply, in a strategic and comprehensive manner, the concepts which, a few years later, came to light in the prestigious publication we celebrate today, titled “The Competitive Advantage of Nations”, which has inspired the design of numerous policies and strategies throughout the world, which has brought about a proliferation of followers, which has trained instructors and which has generated a large number of new researchers and academics, new policy makers, new instruments for competitiveness and extraordinary levels of prosperity throughout the world. Since then, we have shared our own particular project which, alive and changing, responds to the new economic and social challenges and conflicts by constructing and applying a Country strategy with distinctive achievements and results beyond our economic environment. It lies within the conceptual framework inspired by the complementary tripod of Michael E. Porter's conceptual movement in his Competitive Advantage (Competitiveness, Shared Value Initiative and Social Progress) and our contributions learned from day to day in keeping with our vocation, identity, will and commitment. It is a never-ending process based on a model and a way of understanding the former pledge to give ourselves a single strategy designed by and for people.
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