A Chiral Salen-type Schiff Base Cu2+ Complex for the Vinylic-type Polymerization of Norbornene

• Published in: Journal of inorganic and organometallic polymers and materials 2010-06, Vol.20 (2), p.235-241
• Main Authors: Chu, Zeng, Ding, Li Qin, Long, Yong, Chen, Lei Lei, Lü, Xing Qiang, Song, Ji Rong, Fan, Dai Di, Bao, Feng, Ma, Rui
• Format: Article
• Language: English
• Subjects: Chemistry; Chemistry and Materials Science; Inorganic Chemistry; Organic Chemistry; Polymer Sciences
• ISSN: 1574-1443; 1574-1451
• DOI: 10.1007/s10904-010-9335-z

The chiral Salen-type Schiff base ligand H 2 L ( H 2 L  = (s)-(+)2,2′-bis(2-hydroxy-3-methoxybenzylideneamino)-1,1′-binaphthyl), was selected to obtain the new chiral Cu 2+ complex CuL ( 1 ), which was found to catalyze the polymerization of norbornene (NBE). The complex shows the distinctively distorted geometry from a square-planar reactive center, this feature being suggested to account for the efficient catalysis on the vinylic-type polymerization of NBE, with moderate molecular weights and narrow molecular weight distributions. Graphical Abstract From the involvement of a chiral Salen-type Schiff base ligand H 2 L ( H 2 L  = (s)-(+)2,2′-bis(2-hydroxy-3-methoxybenzylideneamino)-1,1′-binaphthyl), the new chiral Cu 2+ complex CuL ( 1 ) was obtained, and found to catalyze the polymerization of Norbornene (NBE). The polymerization results showed that the Cu 2+ complex 1 , endowing the distinctive distortion from a square-planar reactive center, could efficiently catalyze the vinylic-type polymerization of NBE, with moderate molecular weights and narrow molecular weight distributions.