| Well-defined bis（phenolate） lanthanide methoxides as efficient initiators for the polymerization of cyclic carbonate and lactide |
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| 作者姓名： | XU XiaoPing YAO YingMing ZHANG Yong SHEN Qi |
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| 作者单位： | [1]Key Laboratory of Organic Synthesis of Jiangsu Province, Department of Chemistry and Chemical Engineering, Dushu Lake Campus, Suzhou University, Suzhou 215123, China; [2]State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences Changchun 130022, China |
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| 基金项目： | Supported by the National Natural Science Foundation of China （Grant No. 20472063）, the Innovation Project of Graduate Education of Jiangsu Province, the State Key Laboratory of Polymer Physics and Chemistry, and the Key Laboratory of 0rganic Synthesis of Jiangsu Province |
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| 摘 要： | Lanthanide methoxides supported by carbon-bridged bis(phenolate) ligands 2,2′-methylene-bis(6-tert- butyl-4-methylphenoxo) (MBMP2-) (MBMP)Ln( μ-OMe)(THF)2]2 (Ln = Nd (1), Yb (2)) were synthesized in high yields by the protolysis reaction using (C5H5)3Ln(THF) as starting materials, and complex 1 was structurally characterized. The coordination geometry around the center metal can be best described as a distorted octahedron. Complexes 1 and 2 were shown to be efficient initiators for the ring-opening polymerization of 2,2-dimethyltrimethylene carbonate (DTC) and L-lactide. The mechanism of DTC polymerization was explored by the end group analysis of the oligomer.
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| 关 键 词： | 稀土元素甲醇盐 二苯酚盐配体 丙交酯 碳酸盐 聚合物 |
| 收稿时间： | 23 November 2006 |
| 修稿时间： | 2006-11-232007-01-05 |
Well-defined bis(phenolate) lanthanide methoxides as efficient initiators for the polymerization of cyclic carbonate and lactide |
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| XU XiaoPing YAO YingMing ZHANG Yong SHEN Qi.Well-defined bis(phenolate) lanthanide methoxides as efficient initiators for the polymerization of cyclic carbonate and lactide[J].Chinese Science Bulletin,2007,52(12):1623-1628. |
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| Authors: | Xu XiaoPing Yao YingMing Zhang Yong Shen Qi |
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| Institution: | (1) Key Laboratory of Organic Synthesis of Jiangsu Province, Department of Chemistry and Chemical Engineering, Dushu Lake Campus, Suzhou University, Suzhou, 215123, China;(2) State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China |
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| Abstract: | Lanthanide methoxides supported by carbon-bridged bis(phenolate) ligands 2,2′-methylene-bis(6-tert-butyl-4-methylphenoxo) (MBMP2−) (MBMP)Ln(μ-OMe)(THF)2]2 (Ln = Nd (1), Yb (2)) were synthesized in high yields by the protolysis reaction using (C5H5)3Ln(THF) as starting materials, and complex 1 was structurally characterized. The coordination geometry around the center metal
can be best described as a distorted octahedron. Complexes 1 and 2 were shown to be efficient initiators for the ring-opening
polymerization of 2,2-dimethyltrimethylene carbonate (DTC) and L-lactide. The mechanism of DTC polymerization was explored by the end group analysis of the oligomer.
Supported by the National Natural Science Foundation of China (Grant No. 20472063), the Innovation Project of Graduate Education
of Jiangsu Province, the State Key Laboratory of Polymer Physics and Chemistry, and the Key Laboratory of Organic Synthesis
of Jiangsu Province |
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| Keywords: | lanthanide bis(phenolate) ligands alkoxide lactide 2 2-dimethyltrimethylene carbonate polymerization |
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