Synthesis and characterization of titanium complexes bearing sulfoxide groups and their catalytic behaviors in ethylene homo- and copolymerization  

作　　者：WANG Zheng PENG Ai-Qing SUN Xiu-Li TANG Yong 

机构地区：[1]State Key Laboratory of Organometallic Chemistry,Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences

出　　处：《Science China Chemistry》2014年第8期1144-1149,共6页中国科学（化学英文版）

基　　金：supported by the National Natural Sciences Foundation of China (21174159, 21121062);the Science and Technology Commission of Shanghai Municipality;the Chinese Academy of Sciences

摘　　要：Titanium complexes derived from 2,4-di-tert-butyl-6-（（2-（arylsulfinyl）phenylimino）methyl）phenol are designed and synthe- sized. X-ray diffraction studies reveal that the complexes adopt distorted octahedral geometry with O（phenol）, N（imine）, and O（sulfoxide） coordinated with titanium. Combined with modified methylaluminoxane（MMAO）, the complexes exhibit moderate to high activity to afford polyethylene even at 120 ℃ under 1 atm ethylene pressure. The complexes also show excellent capability in copolymerization of ethylene with either 1-hexene or norbornene. Results indicate that the introduction of sulfoxide groups could open the space around central metal and favors the insertion of bulky comonomers.Titanium complexes derived from 2,4-di-tert-butyl-6-((2-(arylsulfinyl)phenylimino)methyl)phenol are designed and synthesized. X-ray diffraction studies reveal that the complexes adopt distorted octahedral geometry with O(phenol), N(imine), and O(sulfoxide) coordinated with titanium. Combined with modified methylaluminoxane(MMAO), the complexes exhibit moderate to high activity to afford polyethylene even at 120 °C under 1 atm ethylene pressure. The complexes also show excellent capability in copolymerization of ethylene with either 1-hexene or norbornene. Results indicate that the introduction of sulfoxide groups could open the space around central metal and favors the insertion of bulky comonomers.

关 键 词：SULFOXIDE catalyst synthesis ethylene polymerization COPOLYMERIZATION 

分 类 号：O643.36[理学—物理化学] O631.5[理学—化学]