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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Comparing a series of 8-quinolinolato complexes of aluminium, titanium and zinc as initiators for the ring-opening polymerization of rac-lactide
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Comparing a series of 8-quinolinolato complexes of aluminium, titanium and zinc as initiators for the ring-opening polymerization of rac-lactide

机译:比较一系列由铝,钛和锌组成的8-喹啉酸酯合成引发剂,用于外消旋丙交酯的开环聚合

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摘要

The preparation and characterization of a series of 8-hydroxyquinoline ligands and their complexes with Ti(IV), Al(III) and Zn(II) centres is presented. The complexes are characterized using NMR spectroscopy, elemental analysis and, in some cases, by single crystal X-ray diffraction experiments. The complexes are compared as initiators for the ring-opening polymerization of racemic-lactide; all the complexes show moderate/good rates and high levels of polymerization control. In the case of the titanium or aluminium complexes, moderate iso-selectivity is observed (P-i = 0.75), whereas in the case of the zinc complexes, moderate hetero-selectivity is observed (P-s = 0.70).
机译:介绍了一系列8-羟基喹啉配体及其与Ti(IV),Al(III)和Zn(II)中心的配合物的制备和表征。使用NMR光谱,元素分析以及在某些情况下通过单晶X射线衍射实验对复合物进行表征。比较了该配合物作为外消旋丙交酯开环聚合反应的引发剂。所有的配合物都显示出中等/良好的速率和高水平的聚合控制。在钛或铝络合物的情况下,观察到中等的选择性(P-i = 0.75),而在锌络合物的情况下,观察到中等的选择性(P-s = 0.70)。

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