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Structures and Luminescence Property of Two Co(Ⅱ) and Cd(Ⅱ) Supramolecular Coordination Networks Created via Synergistic Effect of Coordination Bonds and Secondary Interactions
Author NameAffiliationE-mail
REN Yong-He College of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao, Shandong 266590, China  
LI Lu-Chao College of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao, Shandong 266590, China  
DING Qi-Hui College of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao, Shandong 266590, China  
HUANG Yong-Qing 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 University, Nanjing 210023, China  
Abstract: Two complexes with chemical formulas[Co(L)2(H2O)4]·2H2O (1) and[Cd(L)2(H2O)]·3H2O (2) were obtained by the reaction of 3-carboxy-1-(4-carboxybenzyl)-pyridinium bromide ((H2L) Br) with corresponding Co(Ⅱ) and Cd(Ⅱ) metal salts. Crystal structure analysis reveals that 1 is a neutral mononuclear complex, which possesses abundant hydrogen bond and π-π interaction components and can be used as supramolecular synthons. In the case of 1, mononuclear[Co(L)2(H2O)4] coordination entities are first joined via hydrogen bonding to produce channel-structured 2D layers, which are further stacked via π-π stacking effect in an interdigitating fashion, generating a 3D porous supramolecular assembly. 2 features a polymeric 1D zigzag chain structure, which is connected via π-π interactions between pendent L ligands, resulting in the formation of 1D ladder chains. Such 1D ladder chains are further combined into wave-like 2D sheets via another two kinds of π-π stacking between two adjacent side rails of 1D ladder chains. Such 2D sheets are further assembled via eight types of O-H…O hydrogen bonds to form a 3D supramolecular structure. According to topological viewpoint based on 1D chains, the 3D structure of 2 can also be deemed as the plywood-like array. In addition, 2 shows strong ultraviolet fluorescence emission with an average life-time of 2.54 ns.
Keywords: Co(Ⅱ) complex  Cd(Ⅱ) complex  secondary interaction  pyridinium  luminescence property
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REN Yong-He,LI Lu-Chao,DING Qi-Hui,HUANG Yong-Qing,ZHAO Yue.Structures and Luminescence Property of Two Co(Ⅱ) and Cd(Ⅱ) Supramolecular Coordination Networks Created via Synergistic Effect of Coordination Bonds and Secondary Interactions[J].Chinese Journal of Inorganic Chemistry,2021,37(11):2047-2058.
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Chinese Journal of Inorganic Chemistry