期刊
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
卷 92, 期 10, 页码 1759-1766出版社
CHEMICAL SOC JAPAN
DOI: 10.1246/bcsj.20190118
关键词
Chemometrics; Acid-base indicator; Molecular structure analysis
资金
- JSPS KAKENHI [JP16K13619, JP18H01998]
- Collaborative Research Program of Institute for Chemical Research, Kyoto University [2015-85, 2016-75]
The pH dependent structure of thymol blue (TB) in solution, a long-standing controversial issue, has been determined by quantum chemistry with an aid of multivariate analysis of electronic absorption spectra. It has been revealed that the TB structure varies from the neutral biprotonated form with open-sulton ring showing red to the monovalent anion of the pure quinoid form showing yellow and then to the quinoid-phenolate form showing blue on raising the pH for a solution.
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