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多金属氧酸盐TBA3[VW5O19]及TBA4[PVW11O40]的固体核磁共振研究

DOI: 10.11938/cjmr20150302, PP. 409-418

Keywords: 多金属氧酸盐(POMs),固体核磁共振,51V核磁共振谱,钨钒酸,磷钨钒酸

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Abstract:

多金属氧酸盐(简称多酸,Polyoxometalates,POMs)是由处于d0电子构型的前过渡金属元素通过共边或共角缩聚而成的金属-氧簇类化合物.由于其具有丰富的分子结构和独特的物理化学性质,已经被广泛应用于功能材料、催化化学和药物化学等领域.其中钒取代的多酸阴离子具有很好的催化活性,特别是对烃类的氧化,它的活性主要受钒取代的数目和钒中心的阴离子环境这两个因素影响.该文利用固体核磁技术分析了一取代钒的两类典型结构中51V的局域结构和化学环境,以及有机阳离子对多酸阴离子结构的影响,特别是对51V的化学环境的影响,为研究多酸的催化活性和催化机理提供基本的结构信息.

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