T. Nakano, Yasuaki Hidaka, Y. Okamoto
Jul 15, 1998
Citations
0
Influential Citations
9
Citations
Journal
Polymer Journal
Abstract
Polymerization of 9-phenylfluoren-9-yl methacrylate was carried out aiming at obtaining highly isotactic, single-handed helical polymers using the complexes of N,N′-diphenylethylenediamine monolithium amide with (−)-sparteine, (+)-1-(2-pyrrolidinylmethyl)pyrrolidine, and (+)-2,3-dimethoxy-1,4-bis(dimethylamino)butane. Although the isotacticity (mm=55–46%) and specific rotation ([α]365 −54–+119°) of the obtained polymers were much lower than those of known single-handed helical polymethacrylates, the poly(methyl methacrylate) (PMMA) derived from the obtained polymers exhibited rather high optical activity ([α]365 −44–−11°) for a polymer which does not take any stable, chiral conformation. The optical activity of the PMMA was attributed to configurational chirality of the main chain.