Wang Sa-Sa, Yang Wen-Bin, Yang Mingxue, Wu Xiao-Yuan, Wu Weiming, Wang Song-Xia, Lin Lang, Lu Can-Zhong
CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China.
Chem Commun (Camb). 2020 Feb 25;56(16):2503-2506. doi: 10.1039/c9cc09008h.
Anionic POMs prefer to bond with positive metal cations instead of neutral or negative organic ligands. Therefore, it is challenging to synthesize POM-based MOFs, let alone bi-POM-based host-guest MOFs. In this work, an unprecedented bi-POM-based host-guest MOF, Na[Ni(enMe)2]4[Ni(enMe)2(H2O)2]2{[Ni6(μ3-OH)3(enMe)3 (SIP)1.5(B-α-PW9O34)]2[H3PNiW11O40]}·5enMe·33H2O (1), with Ni6-capped [PW9O34] as the node of the host framework and Keggin-type [PNiW11O40] units as the guest was synthesized. 1 showed excellent chemical stability towards aqueous solutions of pH 2-12 at both ambient and boiling temperature, providing opportunities for its application in fresh water harvesting from air.
阴离子多金属氧酸盐更倾向于与正金属阳离子结合，而非中性或负性有机配体。因此，合成基于多金属氧酸盐的金属有机框架具有挑战性，更不用说基于双多金属氧酸盐的主客体金属有机框架了。在这项工作中，合成了一种前所未有的基于双多金属氧酸盐的主客体金属有机框架，即Na[Ni(enMe)2]4[Ni(enMe)2(H2O)2]2{[Ni6(μ3-OH)3(enMe)3 (SIP)1.5(B-α-PW9O34)]2[H3PNiW11O40]}·5enMe·33H2O (1)，其以Ni6封端的[PW9O34]作为主体框架的节点，以Keggin型[PNiW11O40]单元作为客体。1在环境温度和沸点温度下对pH值为2 - 12的水溶液均表现出优异的化学稳定性，为其在从空气中收集淡水方面的应用提供了机会。
