多金属氧酸盐
扩展X射线吸收精细结构
铋
结晶学
化学
解吸
质谱法
热重分析
差示扫描量热法
分析化学(期刊)
吸收光谱法
无机化学
物理化学
有机化学
吸附
物理
量子力学
色谱法
热力学
催化作用
作者
Inês C. B. Martins,Dominik Al‐Sabbagh,Ursula Bentrup,Julien Marquardt,Thomas Schmid,Ernesto Scoppola,Werner Kraus,Tomasz M. Stawski,Ana Guilherme Buzanich,Kirill V. Yusenko,Steffen M. Weidner,Franziska Emmerling
标识
DOI:10.1002/chem.202200079
摘要
Abstract A new hetero‐bimetallic polyoxometalate (POM) nano‐ring was synthesized in a one‐pot procedure. The structure consists of tetrameric units containing four bismuth‐substituted monolacunary Keggin anions including distorted [BiO 8 ] cubes. The nano‐ring is formed via self‐assembly from metal precursors in aqueous acidic medium. The compound (NH 4 ) 16 [(BiPMo 11 O 39 ) 4 ] ⋅ 22 H 2 O; (P 4 Bi 4 Mo 44 ) was characterized by single‐crystal X‐ray diffraction, extended X‐ray absorption fine structure spectroscopy (EXAFS), Raman spectroscopy, matrix‐assisted laser desorption/ionisation‐time of flight mass spectrometry (MALDI‐TOF), and thermogravimetry/differential scanning calorimetry mass spectrometry (TG‐DSC‐MS). The formation of the nano‐ring in solution was studied by time‐resolved in situ small‐ and wide‐angle X‐ray scattering (SAXS/WAXS) and in situ EXAFS measurements at the Mo−K and the Bi−L 3 edge indicating a two‐step process consisting of condensation of Mo‐anions and formation of Bi−Mo‐units followed by a rapid self‐assembly to yield the final tetrameric ring structure.
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