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| Syntheses, Structures and Optical Band Gaps of Three Zn(Ⅱ)/Co(Ⅱ) Coordination Polymers |
| Author Name | Affiliation | E-mail | | DING Qi-Hui | Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, College of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao, Shandong 266590, China | | | LIU Yao-Yao | Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, College of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao, Shandong 266590, China | | | LI Lu-Chao | Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, College of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao, Shandong 266590, China | | | HUANG Yong-Qing | Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, College of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao, Shandong 266590, China | yqhuangskd@163.com | | ZHAO Yue | State Key Laboratory of Coordination Chemistry, School of Chemical and Chemical Engineering, Nanjing 210023, China | zhaoyue@nju.edu.cn |
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| Abstract: Three new coordination polymers with formulas[Zn(L1)(L2)0.5Cl]n (1),[Co(L1)(L2)0.5Cl]n (2) and {[Zn(L1) (L3)]ClO4·1.7H2O}n (3) have been prepared via the combination of zwitterionic carboxylic ligand with Zn(Ⅱ) and Co (Ⅱ) salts under the participation of two bridging imidazole-based isomers, where L1, L2 and L3 are 4-carboxy-1-(4-carboxybenzyl)-pyridinium, 1, 4-bis(imidazole-1-ylmethyl)benzene and 1, 3-bis(imidazole-1-ylmethyl)benzene, respectively. Complexes 1 and 2 are isostructural and feature an undulated 2D herringbone layer structure with (6,3) topology, exhibiting a rare 2D→3D inclined polycatenated structure. Compared with 1 and 2, complex 3 displays 1D catenated chain structure, which are further assembled into 2D layer via abundant π-π interactions. It is noteworthy that 1~3 can all be considered as consisting of 1D[M(L1)]n chains and bridging bis-imidazole-based ligands. For 1 and 2, the 1D[M(L1)]n chains take helical form and bridging L2 ligands adopting Z-shape. In contrast, the 1D[M(L1)]n chains in 3 exhibit zigzag form and bridging L3 ligands having C-configuration. The results reveal that different N-donor ancillary ligands and anions have a subtle effect on the final structures. The study of optical band gaps showed that the band gaps of 1~3 were 2.96, 1.72 and 3.16 eV, respectively, which indicates that 1~3 have properties of potential wide-band-gap semiconductors. |
| Keywords: Zn(Ⅱ) complex Co(Ⅱ) complex coordination polymer crystal structure optical band gap |
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| DING Qi-Hui,LIU Yao-Yao,LI Lu-Chao,HUANG Yong-Qing,ZHAO Yue.Syntheses, Structures and Optical Band Gaps of Three Zn(Ⅱ)/Co(Ⅱ) Coordination Polymers[J].Chinese Journal of Inorganic Chemistry,2020,36(11):2014-2022. |
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