The Impact of Charge‐Distribution on Photochromic Properties in 1D Coordination Polymers |
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| Authors: | Jian‐Jun Liu Shu‐Biao Xia Liu Teng Chi‐Xian He Fei‐Xiang Cheng Chang‐Cang Huang |
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| Institution: | 1. Center for Yunnan‐Guizhou Plateau Chemical Functional Materials and Pollution Control, Qujing Normal University, Qujing, Yunnan, P. R. China;2. College of Chemistry, Fuzhou University, Fuzhou, Fujian, P. R. China |
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| Abstract: | The reaction of CdCl2 · 2.5H2O with 1,1′‐bis(3‐carboxybenzyl)‐4,4′‐bipyridinium dichloride (H2L1 · Cl2) or 4,4′‐bis(3‐carboxypyridino)methyl]‐biphenyl dichloride (H2L2 · Cl2) in a dimethylformamide/methanol mixed‐solvent system at room temperature, affording the complexes (CdCl2)3(L1)3]n ( 1 ) and {CdCl2(L2)(H2O)2] · 2H2O}n ( 2 ). They were characterized by elemental analyses, IR spectroscopy, and single‐crystal X‐ray diffraction. Both 1 and 2 exhibit 1D coordination networks, which further stack into a 3D supramolecular structure by hydrogen bonding and π–π interactions. Furthermore, these two complexes exhibit different photochromic behavior in the solid state, which may originate from different charge‐distributions of H2L1 · Cl2 and H2L2 · Cl2 ligands. |
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| Keywords: | Charge‐distribution Coordination polymers Pyridinium derivatives Photochromism Charge transfer |
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