Polynuclear Complex Family of Cobalt(II)/Sulfonylcalixarene: One-Pot Synthesis of Cluster Salt [Co14II]+[Co4II]? and Field-Induced Slo

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• 作者：Meriem Lamouchi ; Erwann Jeanneau ; Ghenadie Novitchi ; Dominique Luneau ; Arnaud Brioude ; Cédric Desroches
• 刊名：Inorganic Chemistry
• 出版年：2014
• 出版时间：January 6, 2014
• 年：2014
• 卷：53
• 期：1
• 页码：63-72
• 全文大小：601K
• ISSN：1520-510X

文摘

In this paper, we report the synthesis and description of a new family of polynuclear cobalt(II) complexes. Starting from the same initial compounds but varying the reaction time results in the formation of several new clusters, an original structure based on [Co₁₄][Co₄] clusters was obtained, representing the first one-pot synthesis of a cobalt aggregate salt reported in the literature. The synthesis and magnetic properties of these cobalt compounds are discussed. Three of them display a binuclear molecular structure (1鈥?b>3) with two encapsulated Co^II ions and show slow relaxation of magnetization at small applied magnetic field (U_eff = 10.7 K for 2 and U_eff = 20.3 K for 3), a characteristic of single-molecule-magnet materials.