@article{oai:soar-ir.repo.nii.ac.jp:00012348,
 author = {Nishikiori,  Hiromasa and Shimamura,  Suguru and Fujii,  Tsuneo},
 journal = {JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY},
 month = {Jan},
 note = {The reaction of spironaphthoxazine (SNO) with acid in ethanol was investigated by spectroscopic analyses SNO was protonated and then transformed into a complex in an acidic ethanol solution in the dark. It is presumed that the complex contains a hydrated proton and its structure is similar to that of the metal complex of a merocyanine-type isomer photoderived from SNO based on its UV-vis absorption and fluorescence spectra. The complex dissociated into SNO by adding base. The complex was further changed under acidic conditions after a long time. Highly concentrated acid decomposed SNO to an indoline compound having a carboxyl group and 1-amino-2-naphthol, which was revealed by fluorescence, IR, and GC-MS analyses. These reaction processes were promoted by UV irradiation., Article, JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY. 252:100-106 (2013)},
 pages = {100--106},
 title = {Reaction of spironaphthoxazine with acid},
 volume = {252},
 year = {2013}
}