Synthesis and Characterization of Schiff Base Metal (Ni, Zn, Co) Complexes and Their Catalytic Studies in Copolymerization of Cyclohexene Oxide with Carbon Dioxide
碩士 === 國立中興大學 === 化學系所 === 105 === A series of novel Nickel, Zinc and Cobalt acetate complexes (1-9) supported by NNO-tridentate Schiff-base ancillary ligands with variously electronic effect of substituents (L5H、L6H) or sterically bulky ligands (L9H) have been synthesized. All of complexes have bee...
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| Other Authors: | |
| Format: | Others |
| Language: | zh-TW |
| Published: |
2017
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| Online Access: | http://ndltd.ncl.edu.tw/handle/77030952498523603715 |
| Summary: | 碩士 === 國立中興大學 === 化學系所 === 105 === A series of novel Nickel, Zinc and Cobalt acetate complexes (1-9) supported by NNO-tridentate Schiff-base ancillary ligands with variously electronic effect of substituents (L5H、L6H) or sterically bulky ligands (L9H) have been synthesized. All of complexes have been characterized by elemental analysis and UV-Vis as well as X-ray diffraction study indicate that complexes have a variety of geometry such as mononuclear four-coordinated nickel center, trinuclear six-coordinated metal center.
Complexes 1-9 was applied to copolymerize carbon dioxide with cyclohexene oxide (CHO) to compare their activities. Experimental results demonstrate that Nickel complex 2 show efficient activity and highly alternating poly (cyclohexene carbonate) for CO2/CHO copolymerization. Complex 2 also illustrates “living” character with the molecular weight of polymers increased linearly with respect to the gradually enlarged portion of monomer. Zinc complex 5 and Cobalt complex 8 are also the active catalysts and highly cis-cyclic carbonate contents for the copolymerization of carbon dioxide with cyclohexene oxide on addition of co-catalyst (PPNCl).
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