Synthesis and characterization of fluoride-incorporated polyoxovanadates

フォーマット:

論文

責任表示:

Kikukawa, Yuji ; Yokoyama, Taiga ; Kashio, Sanae ; Hayashi, Yoshihito

言語:

英語

出版情報:

Elsevier, 2015-06-01

著者名:

• Kikukawa, Yuji
• Yokoyama, Taiga
• Kashio, Sanae
• Hayashi, Yoshihito

掲載情報:

Journal of Inorganic Biochemistry

ISSN:

0162-0134      

巻:

147

開始ページ:

221

終了ページ:

226

バージョン:

author

概要:

The speciation studies of oxovanadates are essential to clarify their biological activities. We surveyed the distribution of oxovanadate species in the presence of halide anions with various acid concentrations in an aqueous mixed-solvent system. The presence of chloride, bromide, and iodide anions has no effects on the appearance of polyoxovanadate species observed in 51V NMR. Those are the precedent formation of metavanadate species and decavanadates. The presence of … fluoride anion during the addition of acids exhibits strong intervention in the polyoxovanadate equilibria and we found the subsequent formation of two polyoxovanadate species by 51V NMR observation. From the estimated experimental condition, we isolated fluoride-incorporated polyoxovanadates {Et<inf>4</inf>N}<inf>4</inf>[V<inf>7</inf>O<inf>19</inf>F] and {Et<inf>4</inf>N}<inf>4</inf>[HV<inf>11</inf>O<inf>29</inf>F<inf>2</inf>], successfully. Polyanion [V<inf>7</inf>O<inf>19</inf>F]4 - is the fluoride-incorporated all V(V) state polyoxovanadate which has two different coordination environments of tetrahedral and square pyramidal vanadium units within the one anionic structural integrity. The structural gap between tetrahedral-unit-based metavanadate and octahedral-unit-based decavanadate structures may be linked by this hybrid complex. © 2015 Elsevier Inc. All rights reserved.<br />Embargo Period 24 months 続きを見る

URL:

http://hdl.handle.net/2297/43085