K. Pitchumani et al., GENERATION, ENTRAPMENT AND REACTIVITY OF LONG-LIVED ORGANIC CARBOCATIONS AND RADICAL CATIONS WITHIN A SUPRAMOLECULAR ASSEMBLY - CA-Y-ZEOLITE, Chemical communications, (2), 1997, pp. 181-182
Diarylethenes spontaneously form the corresponding radical cations and
carbocations upon inclusion within activated Ca Y zeolite; oxygen pla
ys an important role in the generation of the radical cations.