Ring-opening polymerization of rac-lactide by mononuclear zinc complexes that contain chiral tetra-azane ligands

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• 作者：Yancheng Han^a ; ¹ ; Qiyun Feng^b ; ¹ ; Yongfang Zhang^a ; Yunping Zhang^a ; Wei Yao^a ; ^{yaoweiujn@aliyun.com}
• 关键词：Catalyst ; Zinc complex ; Rac-lactide ; Ring-opening polymerization ; Chiral tera-azane ligand
• 刊名：Polyhedron
• 出版年：2017
• 出版时间：10 January 2017
• 年：2017
• 卷：121
• 期：Complete
• 页码：206-210
• 全文大小：755 K
• 卷排序：121

文摘

A series of zinc complexes supported by chiral tetra-azane ligands, (1R,2R)-[(NHAr)C6H4CHN]2C6H10 (L1H2 (Ar = 2,6-iPr2C6H3); L2H2 (Ar = 2,6-Et2C6H3); L3H2 (Ar = 2,6-Me2C6H3); L4H2 (Ar = 4-MeC6H4)), were synthesized via the reactions of the corresponding ligands with ZnMe2. These complexes were well characterized by NMR spectroscopy and elemental analysis. The molecular structures of L2Zn (2) and L3Zn (3) were further confirmed by X-ray diffraction studies. The zinc complexes are efficient initiators for the ring-opening polymerization of rac-lactide, yielding heterotactic-rich polylactide.