Bulletin of the Chemical Society of Japan
Online ISSN : 1348-0634
Print ISSN : 0009-2673
ISSN-L : 0009-2673
Polarized Absorption Spectra and Configuration Analyses of Xanthene and Xanthone
Tsuneyuki MinegishiToshihiko HoshiHiroshi HiratsukaYoshie Tanizaki
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1977 Volume 50 Issue 12 Pages 3140-3143

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Abstract

The polarized absorption sepctra of xanthene and xanthone were measured in stretched poly (vinyl alcohol) films, and the polarization direction of each electronic transition was determined. It was confirmed that xanthone has the short molecular-axis polarized bands (1A11A1) at 343, 260, and 226 nm, and the long molecular-axis polarized ones (1BA21A1) at 290, 266, and 242 nm. The electronic transitions of xanthone are discussed in connection with those of xanthene by use of the configuration analysis. For the 266 and 260 nm bands, the contributions of the intramolecular charge transfer character from the xanthene skeleton to the carbonyl group are considerable.

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