Ring-opening polymerization of lactide using salen–aluminum complexes bearing Schiff-base ligands derived from cis-1,2-cyclohexanediamine

Autor:	Yuan Cui, Dongni Li, Bo Gao, Yuqi Zhou, Li Chen, Baoguo Qiu, Yanhui Li, Qian Duan, Ninghai Hu
Rok vydání:	2015
Předmět:	010405 organic chemistry Materials Chemistry Physical and Theoretical Chemistry 010402 general chemistry 01 natural sciences 0104 chemical sciences
Zdroj:	Journal of Coordination Chemistry. 69:656-667
ISSN:	1029-0389 0095-8972
DOI:	10.1080/00958972.2015.1121248
Popis:	Three aluminum complexes supported by salen ligands derived from cis-1,2-cyclohexanediamine and salicylaldehyde derivatives were synthesized. They were characterized by 1H, 13C NMR spectra, and elemental analysis. X-ray diffraction analysis revealed that aluminum was in distorted square pyramidal geometry in 2. These complexes were employed as catalysts for the ring-opening polymerization (ROP) of L-lactide and rac-lactide. Complex 2 showed the highest activity among these complexes with isopropanol for the ROP of L-lactide and 3 showed the highest stereoselectivity for the ROP of rac-lactide attaining partially isotactic polylactide with a Pm of 0.75. The kinetic data of the polymerization utilizing 3 as catalyst showed that the polymeric rate was first order to the monomer and catalyst.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::707e2f508d06a1deef2d9d587de71a9d https://doi.org/10.1080/00958972.2015.1121248 Zobrazit plný text záznamu