A Hydrogen Bond Motif Giving a Variety of Supramolecular Assembly Structures and Spin-Crossover Behaviors

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• 作者：Koshiro Nishi ; Naohide Matsumoto ; Seiichiro Iijima ; Malcolm A. Halcrow ; Yukinari Sunatsuki ; Masaaki Kojima
• 刊名：Inorganic Chemistry
• 出版年：2011
• 出版时间：November 21, 2011
• 年：2011
• 卷：50
• 期：22
• 页码：11303-11305
• 全文大小：252K
• 年卷期：v.50,no.22(November 21, 2011)
• ISSN：1520-510X

文摘

A series of spin-crossover (SCO) iron(II) compounds, fac-[Fe^II(HL^R)₃]Cl路PF₆ [R = methyl (Me, 1), ethyl (Et, 2), n-propyl (n-Pr, 3), n-butyl (n-Bu, 4), and n-pentyl (n-Pen, 5)], were synthesized, where HL^R denotes a series of [(2-methylimidazol-4-yl)methylidene]monoalkylamines. The cations fac-[Fe^II(HL^R)₃]²⁺ and chloride anions associate through 3:3 imidazole路路路chloride hydrogen bonding. This hydrogen-bonding motif gives rise to a variety of assembly structures consisting of a one-dimensional ladder for 3 and 4, two kinds of two-dimensional networks for 1 and 2, and a cubane-like structure for 5. The compounds exhibit various types of SCO transitions between high-spin (S = 2) and low-spin (S = 0) states as a result of their intermolecular interactions.