新型苯氧基酮亚胺钛配合物：在丙烯聚合中兼具全同立构规整性与活性聚合行为
New phenoxyketimine titanium complexes: combining isotacticity and living behavior in propylene polymerization.
作者信息
Mason Andrew F, Coates Geoffrey W
机构信息
Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853-1301, USA.
出版信息
J Am Chem Soc. 2004 Dec 22;126(50):16326-7. doi: 10.1021/ja044268s.
A series of titanium bis(phenoxyketimine) olefin polymerization catalysts were synthesized and screened for propylene polymerization. The phenoxyketimine ligands contain pentafluorophenyl N-aryl groups and ortho-phenol substituents of varying size. Catalysts with ortho-phenol substituents of intermediate size produce living, substantially isotactic polypropylene. The living nature of these catalyst systems is demonstrated through the synthesis of block copolymers with narrow molecular weight distributions.
合成了一系列双（苯氧基酮亚胺）钛烯烃聚合催化剂，并对其进行丙烯聚合筛选。苯氧基酮亚胺配体含有五氟苯基N-芳基基团和不同尺寸的邻位酚取代基。具有中等尺寸邻位酚取代基的催化剂可生成活性、基本上全同立构的聚丙烯。通过合成具有窄分子量分布的嵌段共聚物证明了这些催化剂体系的活性本质。
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