Intervalence charge-transfer

Wang C, Mohney B K, Williams R, Hupp J T and Walker G C 1998 Solvent control of vibronic coupling upon intervalence charge transfer excitation of (NC)gFeCNRu(NH3)g- as revealed by resonance Raman and near-infrared absorption spectroscopies J. Am. Chem. Soc. 120 5848-9... 

The mixed-valence ion has an intervalence charge transfer band at 1562nm not present in the spectra of the +4 and +6 ions. Similar ions have been isolated with other bridging ligands, the choice of which has a big effect on the position and intensity of the charge-transfer band (e.g. L = bipy, 830 nm). 

Intervalence Charge Transfer Emd Electron Exchange Studies of Dinuclear Ruthenium Complexes Robert J. Crutchley... 

D Alessandro DM, Keene FR (2006) Current trends and future challenges in the experimental, theoretical and computational analysis of intervalence charge transfer (IVCT) transitions. Chem Soc Rev 35 424 140... 

The effects of temperature on the shape of intervalence charge-transfer bands for the radical cations of bis(2-f-butyl-2,3-diazabicyclo[2.2.2]oct-3-yl)hydrazines that are bridged by 2,5-xylene-1,4-diyl, durene-l,4-diyl, naphthalene-1,4-diyl, biphenyl-4,4-diyl and 9,9-dimethylfluorene-2,7-diyl aromatic rings were studied by ESR. ... 

Metal-metal interactions in [(C5H5)(dppe)Fe—CN—Ni(cyclam)— NC—Fe(dppe)(C5H5)] + and [(OC)5Cr—CN—Fe(cyclam)—NC—Cr(CO)5]" were probed by electrochemical and spectroscopic techniques,and intervalence charge-transfer (IVCT) within [(NC)5Fe"CNPt (NH3)5] and [(NC)5Fe"CNPt NCFe(CN)5] analyzed. ... 

By applying an outside potential, many metal oxide films are switchable to a nonstoichiometric redox state, creating an intervalence charge transfer with an... 

In the nonstochiometric redox state, intervalence charge transfer between adjacent WVI and Wv sites leads to the observed intense blue color. Apparently, if the ratio of WVI to Wv is increased further, the ion insertion becomes irreversible, resulting in a permanent color change to red or golden [34,35]. It should be noted that in spite of the apparent progress in explaining the electrochromism on a fundamental level, questions remain and alternate mechanisms have been proposed which suggest the involvement of other oxidation states [36]. 

Figure 105 (a) The proposed structure1313 of [Cu30(PrnL ),j(C104)2-H20 and (b) the intervalence charge transfer... 

Models for the static spectral sensitization of coordination compounds are discussed. Among them, ion pairs with oppositely charged metal complexes, where intervalence charge-transfer interactions occur, appear to be promising exarrples. The spectra and the electron transfer kinetics,of mixed-valence ion pairs of ihe type M /fMCNjgJ4-, where M + = Fe3 Cu2 UO V02 are discussed in detail. 

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