用于环状L-丙交酯开环聚合的均配型和杂配型酮二亚胺锌配合物。
Homoleptic and heteroleptic ketodiiminate zinc complexes for the ROP of cyclic l-lactide.
作者信息
Glöckler Eduard, Kapp Leon, Wölper Christoph, Schumacher Marcel, Gröschel André H, Schulz Stephan
机构信息
Faculty of Chemistry, University of Duisburg-Essen Universitätsstraße 7 45141 Essen Germany
Faculty of Chemistry, University of Münster and Center for Soft Nanoscience (SoN) Busso-Peus-Strasse 10 48149 Münster Germany.
出版信息
RSC Adv. 2023 Oct 12;13(43):29879-29885. doi: 10.1039/d3ra06529d. eCollection 2023 Oct 11.
Homo- and heteroleptic ketodiiminate zinc complexes LZn (1, L = [MeNCHNC(Me)CH]CO), L(ZnCp) (2, L = [MeNCHNC(Me)CH]CO, Cp = CH) and LHZnCp* (3, Cp* = CMe) were synthesized and characterized by H and C NMR and IR spectroscopy as well as by elemental analysis and single crystal X-ray diffraction (sc-XRD, 2, 3). The catalytical activity of heteroleptic complexes 2 and 3 were tested in the ring-opening polymerization (ROP) of l-lactide. Homobimetallic complex 2 showed the highest activity and selectivity for the synthesis of cyclic polylactide (cPLLA; TOF = 17 460 h) at 100 °C in toluene solution, while linear polymers are formed with mononuclear complex 3.
合成了均配和异配酮二亚胺锌配合物LZn (1, L = [MeNCHNC(Me)CH]CO)、L(ZnCp) (2, L = [MeNCHNC(Me)CH]CO, Cp = CH) 和LHZnCp* (3, Cp* = CMe)，并通过氢谱和碳谱、红外光谱以及元素分析和单晶X射线衍射（sc-XRD，2, 3）对其进行了表征。测试了异配配合物2和3在丙交酯开环聚合（ROP）中的催化活性。同双核配合物2在100℃的甲苯溶液中对合成环状聚丙交酯（cPLLA；TOF = 17460 h⁻¹）表现出最高的活性和选择性，而单核配合物3则生成线性聚合物。
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