Syntheses, Crystal Structures, and Magnetic Properties of Four New Cyano-Bridged Bimetallic Complexes Based on the mer-[FeIII(qcq)(CN)3]? Building Block

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• 作者：Xiaoping Shen ; Hongbo Zhou ; Jiahao Yan ; Yanfeng Li ; Hu Zhou
• 刊名：Inorganic Chemistry
• 出版年：2014
• 出版时间：January 6, 2014
• 年：2014
• 卷：53
• 期：1
• 页码：116-127
• 全文大小：621K
• ISSN：1520-510X

文摘

Four new cyano-bridged bimetallic complexes, [{Mn^III(salen)}₂{Fe^III(qcq)(CN)₃}₂]_n路3nCH₃CN路nH₂O (1) [salen = N,N鈥?ethylenebis(salicylideneiminato) dianion; qcq^{鈥?/sup> = 8-(2-quinoline-2-carboxamido)quinoline anion], [{MnIII(salpn)}₂{FeIII(qcq)(CN)₃}₂]_n路4nH₂O (2) [salpn = N,N鈥?1,2-propylenebis(salicylideneiminato)dianion], [{MnII(bipy)(CH₃OH)}{FeIII(qcq)(CN)₃}₂]₂路2H₂O路2CH₃OH (3) (bipy = 2,2鈥?bipyridine), and [{MnII(phen)₂}{FeIII(qcq)(CN)₃}₂]路CH₃CN路2H₂O (4) (phen = 1,10-phenanthroline) have been synthesized and characterized both structurally and magnetically. The structures of 1 and 2 are both unique 1-D linear branch chains with additional structural units of {MnIII(salen/salpn)}{FeIII(qcq)(CN)₃} dangling on the sides. In contrast, 3 and 4 are cyano-bridged bimetallic hexanuclear and trinuclear clusters, respectively. The intermolecular short contacts such as 蟺鈥撓€ interactions and hydrogen bonds extend 1鈥?b>4 into high dimensional supermolecular networks. Magnetic investigation reveals the dominant intramolecular antiferromagnetic interactions in 1, 3, and 4, while ferromagnetic and antiferromagnetic interactions coexist in 2. Alternating current measurement at low temperature indicates the existence of slow magnetic relaxation in 1 and 2, which should be due to the single ion anisotropy of MnIII.}