摘要
合成了一系列含不同取代基水杨醛亚胺配体L1~L5,及相应镍配合物C1~C5,并用核磁共振（1H-NMR）、红外光谱（IR）、质谱（Mass）和元素分析（EA）等手段对配体及配合物进行了表征。以C3为单组分催化剂,研究了在不同聚合条件下单组分催化剂对乙烯聚合的影响,结果表明在极性溶剂二氯甲烷中单组分催化剂显示出高的催化活性,甚至在二氯甲烷与水的混合溶剂中也具有一定的聚合活性。以C1~C5为单组分催化剂对乙烯进行催化聚合,发现当水杨醛亚胺氧的邻位含大位阻取代基时,催化剂显示出较高的催化活性;而当水杨醛亚胺氧的邻、对位含吸电子基时,则显示出低的催化活性。
A series of substituted salicylaldiminato ligands L1—L5 and corresponding nickel（II） complexes C1—C5 were prepared and characterized by 1H-NMR,IR,Mass and EA.Using C3 as a single-component catalyst,ethylene polymerization was investigated under different polymerization conditions.C3 exhibited the highest activity in CH2Cl2 among the applied solvents,and even medium activity in mixed solvent of CH2Cl2 and H2O.Under optimal conditions,the polymerization activities of C1—C5 were compared.Complexes with bulky substituents on the ortho-position of salicylaldiminato displayed high activity,while those with electron-withdrawing groups in ortho-position or para-position,provided low catalytic activities.
出处
《华东理工大学学报（自然科学版）》
CAS
CSCD
北大核心
2011年第3期293-298,共6页
Journal of East China University of Science and Technology
基金
上海市重点学科项目(B502)
中国石油天然气股份有限公司科技风险创新研究项目
教育部留学回国人员科研启动经费
华东理工大学校基金
关键词
水杨醛亚胺配体
镍配合物
催化剂
乙烯聚合
salicylaldiminato ligand
nickel complex
catalyst
ethylene polymerization
