552321-58-1Relevant articles and documents
Photochromic radical compounds based on a naphthopyran system
Kaneko, Takashi,Akutsu, Hiroki,Yamada, Jun-Ichi,Nakatsuji, Shin'ichi
, p. 2127 - 2129 (2007/10/03)
(Matrix presented) Naphthopyran derivatives with aminoxyl substituents (4a,b) gave the corresponding open-formed isomers (5a,b) by irradiation, which could be changed back to the starting closed-formed naphthopyrans by the treatment with SiO2 as a catalyst. The tuning of intermolecular magnetic interactions between the isomer couples was found to be possible in these reversible systems.