{Nb288O768(OH)(48)(CO3)(12)}: A Macromolecular Polyoxometalate with Close to 300 Niobium Atoms
{Nb288O768(OH)(48)(CO3)(12)}: A Macromolecular Polyoxometalate with Close to 300 Niobium Atoms
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{Nb288O768(OH)(48)(CO3)(12)}：一种含有近 300 个铌原子的高分子多金属氧酸盐
DOI：
10.1002/anie.201804088
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
Zheng Shou-Tian
中科院分区：
文献类型：
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作者：
Wu Yan-Lan;Li Xin-Xiong;Qi Yan-Jie;Yu Hao;Jin Lu;Zheng Shou-Tian
获得了含有多达288个铌原子的蛋白质大小（约4.2×4.2×3.6 nm3）的非生物衍生分子{Nb288O768（OH）48（CO3）12}（Nb288），这是迄今为止最大和最高核的聚氧铌酸盐（PONb）。特别是，就金属核数而言，Nb288是迄今为止经典多金属氧酸盐化学（V、Mo、W、Nb和Ta）中报道的第二大团簇。Nb288可以被描述为由六个纳米级高核PONb单元{Nb47O128(OH)6(CO3)2} (Nb47)连接在一起的巨大风车状团簇聚集体 六个额外的 Nb 离子。有趣的是，原位生成的47核Nb47单元可以通过铜配合物分离和桥接，形成无机-有机杂化三维PONb框架，该框架对水解甲基膦酸二甲酯的神经毒剂模拟物表现出有效的催化活性。独特的 Nb47 团簇还为非常有限的 Nb-O 团簇系列提供了一种新型拓扑。
A protein‐sized (ca. 4.2×4.2×3.6 nm3) non‐biologically derived molecule {Nb288O768(OH)48(CO3)12} (Nb288) containing up to 288 niobium atoms has been obtained, which is by far the largest and the highest nuclearity polyoxoniobate (PONb). Particularly, in terms of metal nuclearity number,Nb288is the second largest cluster so far reported in classic polyoxometalate chemistry (V, Mo, W, Nb, and Ta).Nb288can be described as a giant windmill‐like cluster aggregate of six nanoscale high‐nuclearity PONb units {Nb47O128(OH)6(CO3)2} (Nb47) joined together by six additional Nb ions. Interestingly, the 47‐nuclearityNb47units generated in situ can be isolated and bridged by copper complexes to form an inorganic–organic hybrid three‐dimensional PONb framework, which exhibits effective catalytic activity for hydrolyzing nerve agent simulant of dimethyl methylphosphonate. The uniqueNb47cluster also provides a new type of topology to very limited family of Nb‐O clusters.