1,3-双取代吲哚基稀土金属配合物的合成及催化异戊二烯聚合研究

Synthesis and Catalytic Performance for Isoprene Polymerization by 1,3-Disubstiututed Indolyl Rare-earth Complexes

本文设计合成了新型的1,3-双取代吲哚基配体,并得到了一系列新型相应稀土金属配合物。该配合物经过了X-单晶衍射、核磁、红外和元素分析表征。配合物的结构表明,配体与配合物以NCN三齿形式配位,加上两个烃基辅助配体,形成单核五配位构型。该类型配合物在助催化剂(AlMe_(3)和[Ph_(3)C][B(C_(6)F_(5))_(4)])作用下,能高效,高选择性催化异戊二烯聚合反应得到1,4-顺式产物。

A novel 1,3-disubstitued indolyl ligand was designed and synthesized,and furtherly,a series of corresponding rare-earth metal complexes were obtained.The complexes were characterized by X-ray single crystal diffraction,nuclear magnetic resonance(NMR)spectroscopy,Fourier transform infrared(FTIR)spectroscopy as well as elemental analysis.The results indicated that the ligand coordinated to the metal in NCN tridentate mode to form a mononuclear penta-coordination geometry,adding two alkyl groups.The complexes could efficiently catalyze the isoprene polymerization with AlMe_(3)and[Ph_(3)C][B(C_(6)F_(5))_(4)]as co-catalysts to obtain 1,4-cis polymer.