autores Carlos Jorge Ribeiro da Silva Gomes, M. J. M. Coelho, P.J. Carvalho, L.M. Campos, A.M. Carlos J. R. Silva Gomes, M. J. M.
palavras-chave Kinetics Naphthopyran Naphtopyran Organic-inorganic hybrid Photochromism Phtochromism Sol-gel UV light Ureasilicate