A closed hollow capsule structure assembled by double acetate-decorated Anderson-like polyanions

• Published in: Journal of coordination chemistry Vol. 70; no. 1; pp. 25 - 35
• Main Authors: Wang, Yang, Zhang, Guilan, Jiang, Fengrui, Li, Bao, Wu, Lixin
• Format: Journal Article
• Language: English
• Published: Abingdon Taylor & Francis 02.01.2017; Taylor & Francis Ltd
• Subjects: Acetates; Anderson-like; Cations; Chains; hollow capsule structure; organic covalent decoration; Polyoxometalates; Single crystals; Sodium; Synthesis; Thermogravimetric analysis; vanadotungstate; X ray diffraction
• ISSN: 0095-8972; 1029-0389
• DOI: 10.1080/00958972.2016.1255329

An inorganic-organic hybrid vanadotungstate, Na 6 [VW 6 O 22 (CH 3 COO) 3 ]·11H 2 O (1), was synthesized in aqueous solution and characterized by infrared spectrum, elemental analysis, thermogravimetric analysis, X-ray photoelectron spectroscopy, and single-crystal X-ray diffraction. The result of the single-crystal X-ray diffraction analysis reveals that the polyanion of 1 is an acetate single-sided decorated Anderson-like polyoxotungstate with a V V in the central tetrahedral position. For better understanding of the characteristic distinction between 1 and the classical Anderson-type polyanion, we synthesized a triol ligand single-side anchored on the Anderson-type polyoxometalate, [(n-C 4 H 9 ) 4 N] 3 {AlMo 6 O 18 (OH) 3 [(CH 2 O) 3 CNHCOC 5 H 4 N]}·8H 2 O (2), as a comparison. One interesting architectural feature of 1 is that two polyanions [VW 6 O 22 (CH 3 COO) 3 ] 6− are linked by six sodium cations on the same plane to form a closed hollow capsule structure with the inner major axis of 8.54 Å and minor axis of 3.11 Å. As basic building blocks, the closed hollow capsule moieties are assembled into 1D chain-like structures through direct Na−O bonds without additional linkers. The electrochemical behavior of 1 was investigated in pH 4.8 buffer solution to investigate its potential application in electrochemical catalysis; 1 has good catalytic activity for oxidation of thioanisole.