Chinese Journal of Magnetic Resonance >

2015 , Vol. 32 >Issue 3: 409 - 418

DOI: https://doi.org/10.11938/cjmr20150302

Solid-State NMR Studies of TBA3[VW5O19] and TBA4[PVW11O40]

  • DING Li-hong1 ,
  • 2 ,
  • LIU Xiao-long2 ,
  • WANG Qiang2 ,
  • LIU Wen-tao1 ,
  • ZHU Cheng-shen1 ,
  • ZHENG An-min2 ,
  • DENG Feng2*
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  • 1. School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China; 2. National Center for Magnetic Resonance in Wuhan, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics (Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences), Wuhan 430071, China
*Corresponding author：DENG Feng, Tel: +86-027-87198820, E-mail: dengf@wipm.ac.cn.

Received date: 2014-06-27

  Revised date: 2015-07-27

  Online published: 2015-09-05

Supported by

国家自然科学基金资助项目(21473246, 21303253).

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Abstract

Polyoxometalates (POMs) are metal cluster compounds formed by transition metal atoms with d0 or d1 electron configuration via edge or corner polycondensation. Because of their unique molecular structures and physical/chemical properties, POMs have been widely used in functional materials, catalytic chemistry and medicinal chemistry etc. Vanadium-substituted POMs often have high catalytic activities for hydrocarbon oxidation, and such activities are mainly related to the number of vanadium atom and the electron environment these atoms are in. Solid-state NMR, as one of the most important methods to characterize solid acid materials, has been widely applied to study POMs. In this paper, butanyl cations and vanadium atoms in Lindqvist and Keggin oxopolytungstates were characterized by 13C and 51V solid state NMR spectroscopy to obtain information on the local environment these cations and vanadium centers are in. Such information is important for understanding the oxidation catalytic mechanism. It is concluded that 51V solid state NMR spectroscopy can be a quick, convenient and nondestructive tool to study the local environment for vanadium atoms and the bulk morphologies of POMs.

Key words： polyoxometalates; solid-state NMR; 51V magic-angle-spinning spectroscopy; Lindqvist; Keggin

Cite this article

DING Li-hong1 , 2 , LIU Xiao-long2 , WANG Qiang2 , LIU Wen-tao1 , ZHU Cheng-shen1 , ZHENG An-min2 , DENG Feng2* . Solid-State NMR Studies of TBA3[VW5O19] and TBA4[PVW11O40][J]. Chinese Journal of Magnetic Resonance, 2015 , 32(3) : 409 -418 . DOI: 10.11938/cjmr20150302

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