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A novel sandwich shaped {Co III2Co II12Mo V24} cluster with a Co II4 triangle encapsulated in two capped CoIIICo II4Mo V12O40 fragments

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Abstract

A novel discrete {Co14Mo24} nanoscale cluster, {CoIII2CoII10Cl2(dpbt)3(H2O)2[CoIIMoV12O31(CH3O)9]2}·24CH3OH (1) (here, dpbt = 5,5′-di(pyridin-2-yl)-3,3′-bi(1,2,4-triazole)), with a triangular Co4 core encapsulated in two novel capped Co-substituted Keggin-type Co5Mo12O40 anions, has been isolated from alkaline methanol solution. The high-resolution electrospray ionization mass spectrum (HRESI-MS) of microcrystalline 1 in MeOH/CH2Cl2 (v : v = 2 : 1) was recorded. Two prominent overlapping peaks in the range of m/z = 2740–2840 and 1820–1880 for the discrete fragments of [CoIII2CoII12MoV24O62Cl2(dpbt)3(H2O)2(CH3O)x(OH)18−x-2H]2− (x = 9–18, F1) and [CoIII2CoII12MoV24O62Cl2(dpbt)3(H2O)2(CH3O)x(OH)19−x-2H]3− (x = 6–13, F2), respectively, are obtained, confirming the {Co14Mo24} composition in 1. In addition, weak anti-ferromagnetic interactions in 1 are observed.

Graphical abstract: A novel sandwich shaped {CoIII2CoII12MoV24} cluster with a CoII4 triangle encapsulated in two capped CoIIICoII4MoV12O40 fragments

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Supplementary files

Article information


Submitted
19 Nov 2019
Accepted
31 Dec 2019
First published
02 Jan 2020

Dalton Trans., 2020, Advance Article
Article type
Communication

A novel sandwich shaped {CoIII2CoII12MoV24} cluster with a CoII4 triangle encapsulated in two capped CoIIICoII4MoV12O40 fragments

H. Li, H. Pang, P. Yao, F. Huang, H. Bian and F. Liang, Dalton Trans., 2020, Advance Article , DOI: 10.1039/C9DT04459K

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