Fluorescence properties and conformational changes of some keto-cyanine dyes Vasileva, I. A. ; Galanin, M. D. ; Krasnaya, Zh. A. ; Nikitina, A. N. ; Chizhikova, Z. A. Abstract Publication: Optics and Spectroscopy Pub Date: August 1992 Bibcode: 1992OptSp..73..173V