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- W2022986026 abstract "We report the site-specific synthesis of mixed valence TiIV−O−FeII complexes within the pores of ordered mesoporous silica (SBA-15). By using 6-di-tert-butylpyridine as the selective activator of tripodally linked TiIV−OH groups of Ti-grafted SBA-15, the FeCl2·4H2O complexes reacted selectively with the nucleophilic TiIV−O− groups. The formation of Si−O−FeII byproducts, due to the reaction with the abundant Si−OH groups, was successfully restricted and the selectivity for forming the TiIV−O−FeII complexes exceeded 80%. The metal−metal interaction of TiIV−O−FeII complexes was confirmed by the appearance of TiIV/FeII → TiIII/FeIII metal-to-metal charge transfer band, and their coordination, valency, and spin state were characterized by diffuse transmission UV−vis, Fourier transform IR, and Fe K-edge X-ray absorption fine structure measurements. It was also confirmed that the present methods can be extended to other metal combinations of TiIV−O−NiII and TiIV−O−MnII. The electron transfer processes occurring under photoinduced metal-to-metal charge transfer of oxo-bridged mixed valence complexes on silica supports have recently been proven as a new class of visible-light-sensitive redox centers. Thus, the present synthetic procedure allows the fabrication of a variety of photochemical reaction centers according to the molecular-level design." @default.
- W2022986026 created "2016-06-24" @default.
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- W2022986026 date "2008-05-27" @default.
- W2022986026 modified "2023-10-18" @default.
- W2022986026 title "Site-Specific Synthesis of Oxo-Bridged Mixed-Valence Binuclear Complexes on Mesoporous Silica" @default.
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- W2022986026 doi "https://doi.org/10.1021/la704032c" @default.
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