e.g. Filippa Pettersson or Cancer Res. 75(6) , 1102-12, (2015) or 10.1002/anie.201600521
Photochromism of the synthetic 4', 7-dihydroxyflavylium chloride
…, MC Wigand, R Brouillard, AL Macanita…
Index: Figueiredo, Paulo; Lima, Joao C.; Santos, Helena; Wigand, Marie-Claude; Brouillard, Raymond; Macanita, Antonio L.; Pina, Fernando Journal of the American Chemical Society, 1994 , vol. 116, # 4 p. 1249 - 1254
Abstract: The synthetic compound 4', 7-dihydroxyflavylium chloride shows an interesting photochromic effect at moderately acidic pH values. Pale yellow solutions of this compound, equilibrated in the dark at pH 3.4, become bright yellow upon irradiation with 313-nm light. Switching off the light, gives back the initial pale yellow solution. Photochemical methods, 1H NMR, and molecular orbital calculations wereused to elucidate this photochromic ...
