title: Electronic spectra and structure of some phenoxazone-type dyes.
abstract: Quantum-mechanical calculations of the electronic structure and spectra of a number of phenoxazone dyes are given. The distribution analysis of pi-electron density in the ground and excited states makes clear the origin of the colour of these compounds and gives the possibility of direct assessment of organic reagents in terms of colour contrast and sensitivity of analytical reactions. This is illustrated for a series of dihydroxy derivatives of phenoxazone dyes.
authors.affiliation: Colloidal Chemistry and Chemistry of Water Institute, Ukrainian Academy of Sciences, T. G. Shevchenko Kiev State University, Kiev, USSR.
authors.forename: A T
authors.initials: AT
authors.lastname: Pilipenko
authors.forename: L I
authors.initials: LI
authors.lastname: Savransky
authors.forename: I
authors.initials: I
authors.lastname: Simek