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

被引：11

作者：

Liu, Dei-Cheng ^{[1
]}

Li, Chen-Yu ^{[1
,2
]}

Lin, Pei-Hua ^{[1
]}

Chen, Jhy-Der ^{[1
]}

Tsai, Chen-Yen ^{[1
]}

Lin, Chia-Her ^{[1
]}

Ko, Bao-Tsan ^{[1
,3
]}

机构：

[1] Chung Yuan Christian Univ, Dept Chem, Chungli 32023, Taiwan

[2] Plast Ind Dev Ctr, Technol Res Dev, Taichung 407, Taiwan

[3] Natl Chung Hsing Univ, Dept Chem, Taichung 402, Taiwan

来源：

INORGANIC CHEMISTRY COMMUNICATIONS | 2018年 / 90卷

关键词：

Titanium complex; Catalyst; Benzotriazole iminophenolate ligand; Ring-opening polymerization; epsilon-caprolactone; Lactide; METAL-COMPLEXES; ZINC-COMPLEXES; LACTIDE; INITIATORS; TETRADENTATE; DERIVATIVES;

D O I：

10.1016/j.inoche.2018.01.018

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Titanium catalysts incorporated by imino-benzotriazole phenolate (IBTP) ligands ((IBTP)-I-C1NN, (IBTP)-I-C1Fu and (IBTP)-I-C1NO) were synthesized and structurally characterized. The reaction of Ti(OPr)(4) with (IBTP)-I-C1NN-H (1.0 molar equiv.) in toluene produced hexa-coordinated mono-adduct titanium complex ((IBTP)-I-C1NN)Ti((OPr)-Pr-i)(3)] (1). However, six-coordinated bis-adduct Ti complex [((IBTP)-I-C1Fu)(2)Ti((OPr)-Pr-i)(2)] (2) or [((IBTP)-I-C1NO))(2)Ti((OPr)-Pr-i)(2)] (3) resulted from treatment of Ti((OPr)-Pr-i)(4) with (IBTP)-I-C1Fu-H or (IBTP)-I-C1NO-H in CH2Cl2 using a Ti to ligand precursor ratio of 1:2. Catalytic studies for ring-opening polymerization of epsilon-caprolactone (epsilon-CL) or L-lactide utilizing complex 1 were detailedly investigated. Titanium complex 1 was shown to effectively catalyze the epsilon-CL polymerization not only in a "controlled" fashion but also an "immortal" manner, giving narrowly dispersed polymers having the expected molecular weights. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：1 / 7

页数：7

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