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231223s2008 xx |||||o 00| ||eng c |
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|a 10.1021/la704032c
|2 doi
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|a pubmed25n0599.xml
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|a eng
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1 |
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|a Okamoto, Akihiro
|e verfasserin
|4 aut
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|a Site-specific synthesis of oxo-bridged mixed-valence binuclear complexes on mesoporous silica
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|c 2008
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|a Text
|b txt
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|a ƒaComputermedien
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|a ƒa Online-Ressource
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|a Date Completed 15.08.2008
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|a Date Revised 26.06.2008
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a 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/Fe III 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
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|a Journal Article
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|a Nakamura, Ryuhei
|e verfasserin
|4 aut
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|a Osawa, Hitoshi
|e verfasserin
|4 aut
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| 700 |
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|a Hashimoto, Kazuhito
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1991
|g 24(2008), 13 vom: 01. Juni, Seite 7011-7
|w (DE-627)NLM098181009
|x 0743-7463
|7 nnns
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| 773 |
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|g volume:24
|g year:2008
|g number:13
|g day:01
|g month:06
|g pages:7011-7
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|u http://dx.doi.org/10.1021/la704032c
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