КООРДИНАЦИОННАЯ ХИМИЯ, 2017, том 43, № 4, с. 222–229 УДК 541.49 SYNTHESES, CRYSTAL STRUCTURES, AND PROPERTIES OF TWO NEW LANTHANIDE COORDINATION POLYMERS CONSTRUCTED FROM BENZIMIDAZOLE-5,6-DICARBOXYLIC ACID © 2017 Y. L. Wang1, 2 , Z. Wei2, *, P. M. Zhang2 , L. L. Geng2 , and L. H. Wang1, 2 1College of Materials Science & Chemical Engineering, Yanshan University, Qin Huangdao, 066004 P.R. China 2 Institute of Applied Chemistry of Hebei North University, Zhangjiakou, 075000 P.R. China *e-mail: wz0209119@163.com Received January 3, 2016 Two lanthanide coordination polymers, {[Dy(HBidc)(Bidc)(H2O)3] · 3H2O}n (I) and {[Yb(HBidc)(Bidc)(H2O)3] · ·3H2O}n (II) (H3Bidc = benzimidazole-5,6-dicarboxylic acid) have been synthesized via hydrothermal method and characterized by elemental analysis, FT-IR, and single crystal X-ray diffraction(CIF files CCDC nos. 1063066 (I), 1063069 (II)). <...> The single crystal X-ray diffraction analysis reveals that compounds І, II are the isostructural 1D chain structures, which are further extended into 3D supramolecular structures through hydrogen bonds and π…π stacking interactions. <...> Furthermore, the solid state fluorescent properties of I has been investigated and discussed in detail. <...> Keywords: benzimidazole-5,6-dicarboxylic acid, coordination polymer, crystal structure, thermal stability, fluorescence properties DOI: 10.7868/S0132344X17040090 INTRODUCTION The design of coordination polymer is an important goal for synthetic chemistry as it not only provides the opportunity to control fascinating structural diversities but also control the properties of materials in the field of fluorescent, magnetism, catalysis, nonlinear optics, gas storage, ion-exchange and so on [1–6]. <...> Generally, many factors affect the formation of coordination polymer, such as the coordination geometry of metal centers, the coordination ability and bridging mode of organic ligands, temperatures, pH values, solvents and so on [7, 8]. <...> It is well-known that rational selection of central metal atoms and organic ligands with suitable shape, functionality, flexibility, and symmetry makes a pivotal role in construction of coordination polymer. <...> How to select appropriate metal center and organic ligands to construct novel <...>