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■ Synthesis and Optical Properties of Zincke Salts Having Chiral Anions

Isao Yamaguchi,* Mikihiko Minamitani, and Sachiko Jonai

*Department of Material Science, Faculty of Science and Engineering, Shimane University, 1060 Nishikawatsu, Matsue 690-8504, Japan

Abstract

Zincke salts having chiral anions were obtained by the anion exchange reaction of Zincke salts having a chloride anion with R-(-)- or S-(+)-binaphthylphospholic acid sodium salts (R-BINAP-PO4Na and S-BINAP-PO4Na). The anion exchange behavior was investigated by photoluminescence measurements. The circular dichroism (CD) spectra of the Zincke salts having R-BINAP-PO4- or S-BINAP-PO4- showed relatively strong negative and positive Cotton effects, respectively.