Aluminum Complexes Bearing [N,O]-Coumarin-Based Ligands : Synthesis, Characterization and Applicationin Ring-Opening Polymerization of Cyclic Ester
碩士 === 國立中興大學 === 化學系所 === 103 === The coumarin-derived ligand precursors L1H-L8H have been prepared. Reactions of L1H-L8H with 1.2 equiv. of AlMe3 afford aluminum complexes 48-55. All compounds were characterized by NMR spectroscopy and elemental analysis. Molecular structures of 49, 51, and 52 wer...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2015
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| Online Access: | http://ndltd.ncl.edu.tw/handle/20417976002348155562 |
| Summary: | 碩士 === 國立中興大學 === 化學系所 === 103 === The coumarin-derived ligand precursors L1H-L8H have been prepared. Reactions of L1H-L8H with 1.2 equiv. of AlMe3 afford aluminum complexes 48-55. All compounds were characterized by NMR spectroscopy and elemental analysis. Molecular structures of 49, 51, and 52 were determined by X-ray crystallography. The catalytic activities of these complexes towards the ring-opening polymerization of cyclic esters in the presence of alcohols were also examined. Based on the homonuclear decoupled 1H NMR spectra, the atactic polylactides (Pm values ranged from 0.44 to 0.57) were produced using 48-55 as catalysts. Kenetics studies showed that the polymerization reaction is first-order for the complex 48.
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