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| Helical Coordination Polymers Based on Tetra-coordinated Co(Ⅱ): Syntheses, Structures and Photocatalytic CO2 Reduction Reaction |
| Author Name | Affiliation | E-mail | | XU Zhong-Xuan | School of Chemistry and Chemical Engineering, Zunyi Normal College, Zunyi, Guizhou 563002, China | xuzhongxuan4201@163.com | | LI Li-Feng | School of Chemistry and Chemical Engineering, Zunyi Normal College, Zunyi, Guizhou 563002, China | | | BAI Xu-Ling | School of Chemistry and Chemical Engineering, Zunyi Normal College, Zunyi, Guizhou 563002, China | |
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| Abstract: A pair of homochiral coordination polymers, {[Co((R)-CBA)(1,3-BMIB)2]·H2O}n (1-D, (R)-H2CBA=(R)-4-(1-carboxyethoxy)benzoic acid, 1,3-BMIB=1,3-bis(2-methyl-1H-imidazol-1-yl)benzene) and {[Co((S)-CBA)(1,3-BMIB)2]·H2O}n (1-L), were prepared by mixing Co2+, 1,3-BMIB and lactic acid derivates (R)-H2CBA/(S)-H2CBA under hydrothermal condition, respectively. X-ray crystallography reveals there are three types of helical chains constructed by tetra-coordinated Co(Ⅱ) centers, 1,3-BMIB and/or CBA2- ligands in complexes 1-D and 1-L. For unsaturated Co(Ⅱ) centers can act as catalytic active site, complex 1-D with high yield was further used for photo-catalytic research. Mott-Schottky measurements indicate that complex 1-D is a typical n-type semiconductor, while the UV-Vis spectrum confirmed that complex 1-D showed strong absorption in a range of 420~650 nm. Further more, complex 1-D has the small radius and the lowest resistance in charge transportation. Finally, complex 1-D realized photocatalytic reduction of CO2 to CO with an evolution rate of 577.8 μmol·g-1·h-1 in the course of the experiment. |
| Keywords: coordination polymer helical chain tetra-coordinated Co(Ⅱ) center photo-catalytic CO2 reduction |
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| XU Zhong-Xuan,LI Li-Feng,BAI Xu-Ling.Helical Coordination Polymers Based on Tetra-coordinated Co(Ⅱ): Syntheses, Structures and Photocatalytic CO2 Reduction Reaction[J].Chinese Journal of Inorganic Chemistry,2020,36(8):1430-1436. |
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