Titanium complexes bearing benzotriazole iminophenolate ligands as efficient catalysts for ring-opening polymerization of cyclic esters

Dei Cheng Liu, Chen Yu Li, Pei Hua Lin, Jhy Der Chen, Chen Yen Tsai*, Chia Her Lin, Bao Tsan Ko

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

7 引文 斯高帕斯(Scopus)

摘要

Titanium catalysts incorporated by imino-benzotriazole phenolate (IBTP) ligands (C1NNIBTP, C1FuIBTP and C1NOIBTP) were synthesized and structurally characterized. The reaction of Ti(OiPr)4 with C1NNIBTP-H (1.0 molar equiv.) in toluene produced hexa-coordinated mono-adduct titanium complex [(C1NNIBTP)Ti(OiPr)3] (1). However, six-coordinated bis-adduct Ti complex [(C1FuIBTP)2Ti(OiPr)2] (2) or [(C1NOIBTP)2Ti(OiPr)2] (3) resulted from treatment of Ti(OiPr)4 with C1FuIBTP-H or C1NOIBTP-H in CH2Cl2 using a Ti to ligand precursor ratio of 1:2. Catalytic studies for ring-opening polymerization of ε-caprolactone (ε-CL) or L-lactide utilizing complex 1 were detailedly investigated. Titanium complex 1 was shown to effectively catalyze the ε-CL polymerization not only in a “controlled” fashion but also an “immortal” manner, giving narrowly dispersed polymers having the expected molecular weights.

原文英語
頁(從 - 到)1-7
頁數7
期刊Inorganic Chemistry Communication
90
DOIs
出版狀態已發佈 - 2018 4月
對外發佈

ASJC Scopus subject areas

  • 物理與理論化學
  • 無機化學
  • 材料化學

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