Inside Cover, Volume 50, Issue 15
Article first published online: 22 JUN 2012
Copyright © 2012 Wiley Periodicals, Inc.
Journal of Polymer Science Part A: Polymer Chemistry
Volume 50, Issue 15, pages iii–iv, 1 August 2012
How to Cite
(2012), Inside Cover, Volume 50, Issue 15. J. Polym. Sci. A Polym. Chem., 50: iii–iv. doi: 10.1002/pola.26214
- Issue published online: 22 JUN 2012
- Article first published online: 22 JUN 2012
- Cited By
Rare earth tris(borohydride) complexes, Ln(BH4)3(THF)3 (Ln = Sc, Y, La and Dy), are highly efficient single-component catalysts for ring opening polymerizations of α-amino acid N-carboxyanhydrides (NCAs) as presented by H. Peng, J. Ling, Y. Zhu, L. You, and Z. Shen on page 3016. Homopolypeptides and block copolypeptides with relatively narrow molecular weight distributions (as low as 1.14) can be prepared. Polymerization mechanism studies show that at room temperature, two reaction pathways occur simultaneously producing α-hydroxyl-ω-aminotelechelic and α-carboxylic-ω-aminotelechelic polypeptides. However, when the temperature is decreased to 0°C, one of the reaction pathways can be efficiently depressed affording α-hydroxyl-ω-aminotelechelic polypeptide exclusively.