Synthesis, Crystal Structure And Photo-electric Property Of A Series Of Co-M Transition-metal Coordination Polymers

12 polymers have been synthesized under hydrothermal conditions by the reaction of Co(â…¡), Ni(â…¡) and Cu(â…¡) ion with 2,5-pyridinedicarboxylic acid, methyl acid ,1,2,4,5-benzenetetra-carboxylic acid,and piperazine,phenanthroline. Half of the polymers are infinite structures, and the others are monoclinic structures. Their structures had been determined by X-ray single crystal diffraction. The formulas are presented as following: (1) [K₂Cu₂(C₂O₄)(C₁₀H₂O₈)(CH₃OH)₂]_n (2) {[Cu(C₇H₃O₄N)(H₂O)]·H₂O}_n (3) Cu(H₂O)₆·(C₄H₁₂N₂)·(SO₄)₂ (4) [Cu(C₁₂H₈N₂)(H₂O)₂]SO₄ (5) Ni(C₇H₄O₄N)₂(C₄H₁₀N₂)₂·H₂O (6) Ni(H₁-C₄H₃O₄)₂(C₄H₁₀N₂)₂ (7) ^â… Ni^â…¡Ni(C₁₀H₂O₈)(H₂O)₄·4(H₂O) (8) [K₂Co₂(C₂O₄)(C₁₀H₂O₈)(CH₃OH)₂]_n (9){ Co(C₇H₄O₄N)₂(C₄H₁₀N₂)·2H₂O}_n (10) Co(H₁-C₄H₃O₄)₂(C₄H₁₀N₂)₂ (11) Co₂(HCOO)₃·2H₂O (12) Co₂(C₁₀H₆O₈)₄ (H₂O)₁₂Cl₄·8H₂OComplexes (1)-(4) are copper polymers. Polymer (1) possesses a 3D infinite structure by C₂O₄ ligand and C10H2O8 ligand, Polymer (2) possesses a 2D infinite structure , Polymer (3) and (4) are monoclinic structures. Polymers (2),(3) and (4) are bridged by Hydrogen Bonds to 3D infinite structures. Complexes (5)-(7) are nickel polymers. They possess different ligands and have different dimensions. Among them, Polymers (5) and (6) are monoclinic complexes. At last ,the mocules are connected into 3D structure by different hydrogen bonds. and Polymer (7) possesses a 3D infinite structure by coordinate bonds. Polymers (8) to (12) are cobalt polymers, (8) and (11) possess 3D infinite structure by coordinate bonds. Polymer (9) possesses a 1D infinite structure, and then it is bridged to 3D structure by hydrogen bonds. Polymers (10) and (12) are monoclinic complexes. At last , Polymer (10) is connected into 3D structure by different hydrogen bonds orÏ€-Ï€stacking interactions, while Polymer (12) is connected into 2D structure by different hydrogen bonds.All the polymers are characterized by IR, UV-Vis-NIR, surface photovoltage spectrum (SPS). We put emphasis on the comparation of SPS and UV-Vis and the photo-electric properties of these complexes using surface photovoltage spectrum. The results indicate that the surface photovoltage spectra of the complexes all exhibit positive surface photovoltage responses in 300-800nm, which shows some certain photo-electric conversion properties of these complexes. But the intensity, position, number and shape of the responses are different obviously. The distinction might be responsible for their structure, species and coordination environment of metal ions in the complexes. Compared SPS with UV- Vis spectrum, they are basically correlation.All the above works will have an important elicitation and significance for searching a new type of photovoltaic material between inorganic and organic semiconductor and it will provide an important reference value for the synthesis chemistry of coordination polymer and coordination supramolecule.