Synthesis, structure and magnetic study of a novel mixed-valent CoII10CoIII4 shield constructed by mixed pyridine–alcoholate ligands

Yan Peng; Chong-Bin Tian; Hua-Bin Zhang; Zhi-Hua Li; Ping Lin; Shao-Wu Du

doi:10.1039/C2DT12487D

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Synthesis, structure and magnetic study of a novel mixed-valent Co^II₁₀Co^III₄ shield constructed by mixed pyridine–alcoholate ligands†

Yan Peng,^a Chong-Bin Tian,^ab Hua-Bin Zhang,^ab Zhi-Hua Li,^a Ping Lin^a and Shao-Wu Du*^a

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* Corresponding authors

^a State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China

^b Graduate University of Chinese Academy of Sciences, Beijing 100039, P. R. China

Abstract

A novel tetradecanuclear mixed-valent cobalt cluster, formulated as [Co^II₁₀Co^III₄(OH)₂O₆(hmp)₁₀(pdm)₄(CH₃OH)₂]·5H₂O (1), was obtained using mixed ligands of 2-(hydroxymethyl)pyridine (hmpH) and 2,6-pyridinedimethanol (pdmH₂). The cobalt ions in 1 are connected by ten chelating hmp⁻ ligands, four tris-chelating pdm²⁻ ligands and six μ₃-oxide/hydroxide anions, forming a unique shield-like planar structure that is rarely observed for Co-based clusters. Compound 1 displays slight frequency dependence at static zero field below 4.5 K, suggesting that it might be a single molecule magnet (SMM).

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Article information

DOI: https://doi.org/10.1039/C2DT12487D
Article type: Communication
Submitted: 25 Dec 2011
Accepted: 02 Mar 2012
First published: 02 Mar 2012

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Dalton Trans., 2012,41, 4740-4743

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Synthesis, structure and magnetic study of a novel mixed-valent Co^II₁₀Co^III₄ shield constructed by mixed pyridine–alcoholate ligands

Y. Peng, C. Tian, H. Zhang, Z. Li, P. Lin and S. Du, Dalton Trans., 2012, 41, 4740 DOI: 10.1039/C2DT12487D

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Dalton Transactions