These authors contributed equally to this work.
Synthesis and Characterization of Magnesium Alkoxides Incorporated into Bulky Aluminium Tetraphenolate Helices and Application in the Ring-Opening Polymerization of Lactides
Article first published online: 4 JUN 2013
Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
European Journal of Inorganic Chemistry
Volume 2013, Issue 20, pages 3533–3541, July 2013
How to Cite
Jian, C., Zhang, J., Dai, Z., Gao, Y., Tang, N. and Wu, J. (2013), Synthesis and Characterization of Magnesium Alkoxides Incorporated into Bulky Aluminium Tetraphenolate Helices and Application in the Ring-Opening Polymerization of Lactides. Eur. J. Inorg. Chem., 2013: 3533–3541. doi: 10.1002/ejic.201300284
- Issue published online: 2 JUL 2013
- Article first published online: 4 JUN 2013
- Manuscript Received: 28 FEB 2013
- Ring-opening polymerization;
- Heterobimetallic complexes;
Two aluminium and magnesium heterobimetallic complexes of [(LAl)MgOBn]2 (2) and [(LAl)Mg(OC2H4OCH3)]2 (3), in which L = N1,N1,N2,N2-tetrakis(2-hydroxy-3,5-dimethylbenzyl)-1,2-ethanediamine, have been synthesized and characterized by NMR spectroscopy, X-ray crystallography, and elemental analysis. The magnesium alkoxide of complex 2 supported by the bulky aluminium tetraphenolates, as a rare helical heterobimetallic initiator, can effectively initiate the ring-opening polymerization (ROP) of L-lactide (L-LA) leading to polymers with good molecular weight control and narrow molecular weight distributions. Kinetic studies have shown the overall rate expression is –d[lactide]/dt = k[lactide][complex] for the ROP of L-LA. Furthermore, complex 2 shows modest isotactic selectivity in the ROP of rac-lactide.