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Supplementary Observations on the Chemistry of the Alkaloids of Berberine Series and Related Compounds. III. Fluorescence Spectra of the Alkaloids of Berberine Series and Their Related Compounds
Author(s) -
Sebe Eigai,
Abe Seishi,
Murase Noriyoshi,
Sugaya Hideo
Publication year - 1968
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.196800017
Subject(s) - berberine , chemistry , fluorescence , spectral line , series (stratigraphy) , alkaloid , absorption spectroscopy , stereochemistry , organic chemistry , paleontology , physics , quantum mechanics , astronomy , biology
Abstract The absorption maxima of the fluorescence spectra of the berberine series alkaloids are broadly distributed between 360 and 560 m μ. The fluorescence spectra of most substances of this series are very monotonous one having a single peak, the spectra of tetrahydrocoptisine and tetrahydroepiberberine are quite exceptional and consist of two wavy bands. The introduction of the auxochrome group into the molecule of “proto” compounds causes the decreasing of the fluorescence intensity and this effect is strongest in case of transition from protoberberine to berberine. That, tetrahydropalmatine does not show the distinct fluorescence spectrum band is the only incomprehensible fact.