Syntheses, structures and magnetic properties of five iron(II) coordination polymers with flexible bis(imidazole) and bis(triazole) ligands

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• 作者：Xia Zhu^a ; Xin-Yi Wang^b ; Bao-Long Li^a ; ^{libaolong@suda.edu.cn} ; Ju Wang^a ; Song Gao^c ; ^{gaosong@pku.edu.cn}
• 关键词：Iron(II) complexes ; Coordination polymers ; Magnetic properties ; Bis(imidazole) ; Bis(triazole)
• 刊名：Polyhedron
• 出版年：2012
• 出版时间：4 January, 2012
• 年：2012
• 卷：31
• 期：1
• 页码：77-81
• 全文大小：944 K

文摘

Five iron(II) coordination polymers, {[Fe(bte)₂(NCS)₂][Fe(bte)(H₂O)₂(NCS)₂]}_n (1), [Fe(bime)(NCS)₂]_n (2), [Fe(bime)(dca)₂]_n (3), [Fe(bime)₂(N₃)₂]_n (4) and [Fe(btb)₂(NCS)₂]_n (5), were synthesized using the flexible ligands 1,2-bis(1,2,4-triazol-1-yl)ethane (bte), 1,2-bis(imidazol-1-yl)ethane (bime) and 1,4-bis(1,2,4-triazol-1-yl)butane (btb), together with NCS^{?/sup>, dicyanamide (dca) and N₃?/sup>. The compound 1 contains two kinds of motifs (double chain and single chain) and forms a three-dimensional hydrogen bonded network; 2 and 3 contain one-dimensional triple chains; and 4 and 5 form two-dimensional (4, 4) networks. The coordination anions (NCS?/sup>, dca and N₃?/sup>) and the structural characteristics of the ligands (bte, bime and btb) play an important role in the assembly of the topologies. Magnetic studies reveal that 1-5 remain in the high-spin state over the whole temperature range 2-300 K and no detectable spin-crossover is observed.}