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Syntheses, structures and magnetic properties of five iron(II) coordination polymers with flexible bis(imidazole) and bis(triazole) ligands |
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| Authors: | Xia ZhuXin-Yi Wang Bao-Long Li Ju WangSong Gao |
| Institution: | a Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China b State Key Laboratory of Coordination Chemistry, Nanjing National Laboratory of Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, PR China c Beijing National Laboratory of Molecular Science, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, PR China |
| Abstract: | 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−, dicyanamide (dca) and N3−. 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−, dca and N3−) 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. |
| Keywords: | Iron(II) complexes Coordination polymers Magnetic properties Bis(imidazole) Bis(triazole) |
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