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Synthesis, characterization, and catalytic activity of titanium iminophenoxide complexes in relation to the ring-opening polymerization of L-lactide and ε-caprolactone

Authors

  • Hsuan-Ying Chen,

    Corresponding author
    1. Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, 100, Shih-Chuan 1st Road, Kaohsiung, 80708, Kaohsiung, Taiwan, Republic of China
    • Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, 100, Shih-Chuan 1st Road, Kaohsiung, 80708, Kaohsiung, Taiwan, Republic of China
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  • Wei-Yi Lu,

    1. Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, 100, Shih-Chuan 1st Road, Kaohsiung, 80708, Kaohsiung, Taiwan, Republic of China
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  • Yen-Jen Chen,

    1. Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, 100, Shih-Chuan 1st Road, Kaohsiung, 80708, Kaohsiung, Taiwan, Republic of China
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  • Sodio C. N. Hsu,

    1. Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, 100, Shih-Chuan 1st Road, Kaohsiung, 80708, Kaohsiung, Taiwan, Republic of China
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  • Siou-Wei Ou,

    1. Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, 100, Shih-Chuan 1st Road, Kaohsiung, 80708, Kaohsiung, Taiwan, Republic of China
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  • Wei-Te Peng,

    1. Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, 100, Shih-Chuan 1st Road, Kaohsiung, 80708, Kaohsiung, Taiwan, Republic of China
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  • Nai-Yuan Jheng,

    1. Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, 100, Shih-Chuan 1st Road, Kaohsiung, 80708, Kaohsiung, Taiwan, Republic of China
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  • Yi-Chun Lai,

    1. Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, 100, Shih-Chuan 1st Road, Kaohsiung, 80708, Kaohsiung, Taiwan, Republic of China
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  • Bo-Sheng Wu,

    1. Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, 100, Shih-Chuan 1st Road, Kaohsiung, 80708, Kaohsiung, Taiwan, Republic of China
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  • Hsuan Chung,

    1. Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, 100, Shih-Chuan 1st Road, Kaohsiung, 80708, Kaohsiung, Taiwan, Republic of China
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  • Yun Chen,

    1. Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, 100, Shih-Chuan 1st Road, Kaohsiung, 80708, Kaohsiung, Taiwan, Republic of China
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  • Ta-Chou Huang

    1. Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, 100, Shih-Chuan 1st Road, Kaohsiung, 80708, Kaohsiung, Taiwan, Republic of China
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Abstract

This study synthesized a series of titanium iminophenoxide complexes and investigated their suitability as catalysts for the ring-opening polymerization of L-lactide (L-LA) and ε-caprolactone (CL). Complexes with bidentate ligands demonstrate higher catalytic activity than their tridentate counterparts since the third coordination atom needs to contend with L-LA and CL. Differences in the geometric framework of bidentate ligands also influence the catalytic activity. Type II ligands (N, N-trans form of Ti complex) prevent the coordination of monomers to Ti thereby decreasing the initiation rate. © 2012 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2013

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