| The design and synthesis of metal-organic coordination polymers are ofgreat interest, not only because of their intriguing variety of architecturesand topologies, but also because of their tremendous potential applicationsin nonlinear optics, catalysis, gas absorption, luminescence, magnetism andmedicine. Polycarboxylate ligands feature prominently in the constructionof coordination polymers, and the reported coordination polymers aremostly constructed by rigid polycarboxylate ligands. Recently, more andmore attention has been paid to the flexible polycarboxylate ligands, butstudies of semi-rigid V-shaped dicarboxylate ligands are relatively few.On the other hand, the employment of mixed ligands during theself-assembly process has gradually become an effective approach, whichis expected to obtain frameworks with more diverse structural motifscompared to using only one type of ligands. Therefore, the auxiliaryligands such as imidazole-containing ligands, are introduced into thereaction systems so as to tune up the metal coordinated sites. Taking all theabove discussion into account, we focused our attention on2,2’-bipyridine-3,3’-dicarboxylic acid （H2BPDC） and4,4’-methylenedibenzoic acid （H2DBA） and successfully synthesized a series of new complexes:[Cu（BPDC）（2,2’-bipy）]（1）,[Cu（BPDC）（BIB）2·H2O]n（2）,[Cu（BPDC）（4,4’-bipy）]n（3）, Zn（DBA）（Hpyim）·H2O （4）, Cd（DBA）（Hpyim）（5）,Zn（DBA）（bix）·2H2O （6）, Co（DBA）（bix）（7）, Ni （DBA）（bix）（8）,Co（DBA）（mbix）（9）,Ni（DBA）（mbix）（H2O）2·H2O（10）, Ni2（DBA）2（BIDPE）2（H2O）（11）,[Mn2（DBA）2（bix）0.5]（12）,（Hpyim=2-（2-pyridyl）imidazole, bix=1,4-bis（imidazol-1-ylmethyl） benzene and mbix=1,3-bis（imidazol-1-yl-methyl）benzene）. Herein, we present their syntheses, crystal structures andtheir properties. |
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