scholarly journals Small anion-assisted electrochemical potential splitting in a new series of bistriarylamine derivatives: organic mixed valency across a urea bridge and zwitterionization

2019 ◽  
Vol 15 ◽  
pp. 2277-2286
Author(s):  
Keishiro Tahara ◽  
Tetsufumi Nakakita ◽  
Alyona A Starikova ◽  
Takashi Ikeda ◽  
Masaaki Abe ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Charge Transfer ◽  
Electrochemical Behavior ◽  
Mixed Valence ◽  
Electrochemical Potential ◽  
Electronic Interactions ◽  
Mixed Valency ◽  
Transfer Characteristics ◽  
Intervalence Charge Transfer

We report the synthesis of a new bistriarylamine series having a urea bridge and investigate its mixed-valence (MV) states by electrochemical and spectroelectrochemical methods. We found that the supporting electrolytes had unusual effects on potential splitting during electrochemical behavior, in which a smaller counteranion thermodynamically stabilized a MV cation more substantially than did a bulky one. The effects contrary to those reported in conventional MV systems were explained by zwitterionization through hydrogen bonding between the urea bridge and the counteranions, increasing the electronic interactions between two triarylamino units. Furthermore, we clarified the intervalence charge transfer characteristics of the zwitterionic MV state.

scholarly journals Configuration coordinate energy level diagrams of intervalence and metal-to-metal charge transfer states of dopant pairs in solids

2015 ◽  
Vol 17 (30) ◽  
pp. 19874-19884 ◽  
Author(s):  
Zoila Barandiarán ◽  
Andries Meijerink ◽  
Luis Seijo
Keyword(s):  
Charge Transfer ◽  
Energy Level ◽  
Energy Levels ◽  
Mixed Valence ◽  
Active Centers ◽  
Metal Charge ◽  
Intervalence Charge Transfer ◽  
Metal Charge Transfer ◽  
Configuration Coordinate

Configuration coordinate diagrams, which are normally used in a qualitative manner for the energy levels of active centers in phosphors, are quantitatively obtained here for intervalence charge transfer (IVCT) states of mixed valence pairs and metal-to-metal charge transfer (MMCT) states of heteronuclear pairs, in solid hosts.

Intervalence Charge-Transfer System by 1D Assembly of New Mixed-Valence Octanuclear CuI/CuII/CuIIICluster Units

2011 ◽  
Vol 50 (7) ◽  
pp. 2708-2710 ◽  
Author(s):  
Takashi Okubo ◽  
Hiroyasu Kuwamoto ◽  
Kyung Ho Kim ◽  
Shinya Hayami ◽  
Akihito Yamano ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Mixed Valence ◽  
Transfer System ◽  
Intervalence Charge Transfer

scholarly journals Rigidification of a macrocyclic tris-catecholate scaffold leads to electronic localisation of its mixed valent redox product

2019 ◽  
Vol 55 (16) ◽  
pp. 2281-2284
Author(s):  
Sam Greatorex ◽  
Kevin B. Vincent ◽  
Amgalanbaatar Baldansuren ◽  
Eric J. L. McInnes ◽  
Nathan J. Patmore ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Class Ii ◽  
Radical Product ◽  
Mixed Valency ◽  
Intervalence Charge Transfer

One-electron oxidation of the compound shown shows no evidence for intervalence charge transfer in the macrocylic ligand radical product. In contrast, related [{Pt(L)}3(μ3-ctc˙)]+ (H6ctc = cyclotricatechylene), exhibits class II mixed valency.

scholarly journals Quantification of the mixed-valence and intervalence charge transfer properties of a cofacial metal–organic framework via single crystal electronic absorption spectroscopy

2020 ◽  
Vol 11 (20) ◽  
pp. 5213-5220
Author(s):  
Patrick W. Doheny ◽  
Jack K. Clegg ◽  
Floriana Tuna ◽  
David Collison ◽  
Cameron J. Kepert ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Mixed Valence ◽  
Three Dimensional ◽  
Fundamental Understanding ◽  
Intervalence Charge Transfer ◽  
Metal Organic ◽  
Transfer Properties ◽  
Transfer Mechanisms

Gaining a fundamental understanding of charge transfer mechanisms in three-dimensional Metal–Organic Frameworks (MOFs) is crucial to the development of electroactive and conductive porous materials.

Synthesis, Characterization, and Intervalence Charge Transfer Properties of a Series of Rhenium(I)−Iron(III) Mixed-Valence Compounds

1999 ◽  
Vol 38 (3) ◽  
pp. 606-612 ◽  
Author(s):  
Brian W. Pfennig ◽  
Jamie L. Cohen ◽  
Irene Sosnowski ◽  
Nathan M. Novotny ◽  
Douglas M. Ho
Keyword(s):  
Charge Transfer ◽  
Mixed Valence ◽  
Intervalence Charge Transfer ◽  
Mixed Valence Compounds ◽  
Transfer Properties

Stark spectroscopy of mixed-valence systems

2007 ◽  
Vol 366 (1862) ◽  
pp. 33-45 ◽  
Author(s):  
Lisa N Silverman ◽  
Pakorn Kanchanawong ◽  
Thomas P Treynor ◽  
Steven G Boxer
Keyword(s):  
Charge Transfer ◽  
Electric Fields ◽  
Dipole Moments ◽  
Mixed Valence ◽  
Quantitative Information ◽  
Stark Spectroscopy ◽  
Charge Transfer Transition ◽  
Band Position ◽  
Stark Effects ◽  
Intervalence Charge Transfer

Many mixed-valence systems involve two or more states with different electric dipole moments whose magnitudes depend upon the charge transfer distance and the degree of delocalization; these systems can be interconverted by excitation of an intervalence charge transfer transition. Stark spectroscopy involves the interaction between the change in dipole moment of a transition and an electric field, so the Stark spectra of mixed-valence systems are expected to provide quantitative information on the degree of delocalization. In limiting cases, a classical Stark analysis can be used, but in intermediate cases the analysis is much more complex because the field affects not only the band position but also the intrinsic bandshape. Such non-classical Stark effects lead to widely different bandshapes. Several examples of both classes are discussed. Because electric fields are applied to immobilized samples, complications arise from inhomogeneous broadening, along with other effects that limit our ability to extract unique parameters in some cases. In the case of the radical cation of the special pair in photosynthetic reaction centres, where the mixed-valence system is in a very complex but structurally well-defined environment, a detailed analysis can be performed.

A Hexadecanuclear Copper(I)–Copper(II) Mixed-Valence Compound: Structure, Magnetic Properties, Intervalence Charge Transfer, EPR, and NMR

2007 ◽  
Vol 2007 (23) ◽  
pp. 3695-3700 ◽  
Author(s):  
Senjuti De ◽  
Shubhamoy Chowdhury ◽  
Jnan P. Naskar ◽  
Michael G. B. Drew ◽  
Rodolphe Clérac ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Charge Transfer ◽  
Mixed Valence ◽  
Compound Structure ◽  
Intervalence Charge Transfer ◽  
Mixed Valence Compound
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