A High-Nuclear Isopolymolybdate Cluster Assembled with an Anionic [{Mo 24 O 48 (OMe) 32 }] 8- and Two Charge-Neutral [{Mo 24 O 52 (OMe) 28 }] Cages.
Yingyue WangXinyi MaGuoao LiHuafeng LiQuanzhong WangWenjing ChenPengtao MaShuhua LiJingyang NiuJingping WangPublished in: Chemistry (Weinheim an der Bergstrasse, Germany) (2022)
We synthesized a high-nuclear isopolymolybdate cluster (n-Bu 4 N) 6 H 2 [{Mo 24 O 48 (OMe) 32 }{Mo 24 O 52 (OMe) 28 } 2 ] ⋅ 25H 2 O ⋅ 6CH 3 CN (1) by using [Mo 6 O 19 ] 2- as the base precursor. Crystallographic characterization shows the cluster is composed of an anionic [{Mo 24 O 48 (OMe) 32 }] 8- cage and two charge-neutral [{Mo 24 O 52 (OMe) 28 }] cages. Supported by the electrospray ionization mass spectrometry study, the polyoxoanion structural unit [Mo 24 O 48 (CH 3 O) 27 ] 3- demonstrates strong stability in acetonitrile solution. Moreover, 1 exhibits good proton conductivity of 1.79×10 -3 S cm -1 at 358 K and 98 % relative humidity.