DIPYRIDYL-TYPE LIGAND-DIRECTED ASSEMBLY OF THREE COBALT(II) COORDINATED POLYMERS BASED ON CARBOXYPHENYLPROPIONATE

摘要

A series of Co(II)—H_2Cpp coordination polymers incorporating different auxiliary ligands, [Co(Cpp)(Phen)(H_20)] (I), {[Co(Bipy)(H_2O)_4](Cpp)}_n (II), and [Co(Cpp)(Bds)(H_2O)]_n (III) (H_2Cpp = = 3-(4-carboxyphenyl)propionic acid, Phen = 1,10-phenanthroline, В?ру = 4,4'-bipyridyl, and Bds = 4,4'-bipyridyl sulfide), were synthesized by the hydrothermal reaction and characterized by single crystal X-ray diffraction, elemental analysis, IR, and TG. Three complexes display from 0D to 1D different structural features under the regulation of distinguishing dipyridyl-type coligands. Complex I possesses a binuclear Co(II) motif constructed by H_2Cpp and Phen, which further developing a zipper-like 2D layer via H-bonded and π—π stacking interactions. Complex II displays straight В?ру-bridging 1D chain, and further forming a 3D supramolecular structure by hydrogen-bonded interactions. Complex III exhibits 1D double-chain collectively jointed by Cpp and Bds, which further interlinked into a 3D supramolecular architecture by H-bonded interactions.