A semi-rigid bis(imidazolyl) ligand for the construction of nanoscopic supramolecules. From the molecular rectangle to the 1D coordination polymer |
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| Authors: | Jun Liu Chun-Long Chen Cheng-Yong Su Bei-Sheng Kang |
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| Affiliation: | (1) School of Chemistry and Chemical Engineering, Sus Yat-Sen University, Guangzhou, 510275, China |
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| Abstract: | Reaction of the semi-rigid ligand 2,4-bis(1-imidazolylmethyl)-mesitylene (m-bimms) with CdCl2 afforded a boat-like molecular rectangle [Cd(m-bimms)Cl2]2 · 1/2H2O (1), with the orientation of the two imidazolyl arms of the ligand in syn-conformation and bridging chloride ions bisecting the macrocycle. Weak Cl· · ·H—C interations further extended the dimers into 1D infinite chains with nanoscopic channels. An analogous reaction with Cd(NO3)2 gave a 1D coordination polymer [Cd(m-bimms)2(NO3)2]n · 2nH2O (2) composed of nanoscopic metallamacrocycles, where the two imidazolyl arms adopt an anti-conformation. Different anions result in different ligand conformations and thus determine the varied molecular architectures. |
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