Title
Photo Racemization and Polymerization of (R)-1,1′-Bi(2-naphthol)
Author
Zhaoming Zhang, Yue Wang, Tamaki Nakano
Year
2016
Journal
Molecules
Abstract
(R)-1,1’-Bi(2-naphthol) ((R)-BINOL) in an acetonitrile solution lost optical activity upon irradiation with an Hg–Xe lamp. HPLC resolution of the product indicated that (R)-BINOL was racemized upon irradiation, and SEC analysis suggested that a polymeric product was formed in the course of racemization. It is proposed that polymerization of BINOL can occur before it is racemized and that a unit in a polymer derived from BINOL may lose its optical activity afterwards due to in-chain racemization and/or reduction. The polymeric products seem to consist not only of BINOL residues but also of residues derived from acetonitrile as well as those derived through reduction of BINOL.
Full Article
Instrument
FP-8500
Keywords
Fluorescence, Polymers