title: Inclusion complex of spironaphthoxazine with gamma-cyclodextrin and its photochromism study.
abstract: An environmentally benign transparent photochromic film, 1,3-dihydro-1,3,3-trimethylspiro[2H-indole-2,3'-[3H]-naphtho[2,1-b][1,4]oxazine] (SPO) /gamma-cyclodextrin (gamma-CD), was prepared using the cast-coating method, and the nanocavity effect of gamma-CD on the photochromism of SPO was studied. The film mainly consists of the inclusion complex SPO@gamma-CD, which has been verified by EA, TGA, XRD, MS, and ICD to comprise a 1:1 host-guest stoichiometry. The film shows normal photochromism. The decoloration of photomerocyanine (PMC) fits biexponential decay: PMCs located in the cavity of gamma-CD decay with a rate constant of 6.0 x 10(-2) s(-1), which is nearly one order faster than those PMCs outside of the cavity.
authors.affiliation: Beijing National Laboratory of Molecular Sciences, Center for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, PR China.
authors.forename: Shu-Xiao
authors.initials: SX
authors.lastname: Zhang
authors.forename: Mei-Gong
authors.initials: MG
authors.lastname: Fan
authors.forename: Yuan-Yuan
authors.initials: YY
authors.lastname: Liu
authors.forename: Ying
authors.initials: Y
authors.lastname: Ma
authors.forename: Guang-Jin
authors.initials: GJ
authors.lastname: Zhang
authors.forename: Jian-Nian
authors.initials: JN
authors.lastname: Yao