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Syntheses, Structures and Luminescence Properties of Coordination Polymers in Mixed-Ligand System
Author NameAffiliationE-mail
WANG Xin-Ping College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, Shandong 266042, China  
LI Ying-Ying College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, Shandong 266042, China  
LIU Yong College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, Shandong 266042, China  
SUN Jing College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, Shandong 266042, China  
LIU Kang College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, Shandong 266042, China liukang82@126.com 
WANG Lei College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, Shandong 266042, China  
Abstract: Three novel coordination polymers, formulated as[Cd3(pic)4(H2bmimb)]n (1),[Co3(pic)4(H2bmimb)]n (2),[Cd2(1,2-mbix)(pic)2(H2O)2]n (3) (H2bmimb=1,4-bis((2-methyl-1H-imidazol-1-yl)methyl)benzene, 1,2-mbix=1,2-bis((2-methyl-1H-imidazol-1-yl)methyl)benzene, pic=5-phenylisophthalic acid), were synthesized by self-assembly of mixed ligands with Cd(Ⅱ) and Co(Ⅱ) under solvothermal conditions and characterized by means of single-crystal X-ray diffraction, X-ray powder diffraction, infrared spectra, thermogravimetric analysis and fluorescence spectra. Single-crystal X-ray diffraction analysis revealed that complexes 1 and 2 possess 3D anionic frameworks, in which the protonated bis-imidazole ligands balance the charge of the frameworks. In complex 3, the Cd2+ ions are linked by pic and 1,2-mbix ligands to generate a 1D chain structure. The adjacent chains are held together to form a 2D layer via π…π stacking and then a 3D supramolecular framework through hydrogen-bonding interactions. In addition, luminescence properties of complexes 1 and 3 in the solid state were characterized.
Keywords: solvothermal synthesis  coordination polymers  mixed-ligand  luminescence propreties
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WANG Xin-Ping,LI Ying-Ying,LIU Yong,SUN Jing,LIU Kang,WANG Lei.Syntheses, Structures and Luminescence Properties of Coordination Polymers in Mixed-Ligand System[J].Chinese Journal of Inorganic Chemistry,2017,33(5):823-829.
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Chinese Journal of Inorganic Chemistry