ISSN:
1436-2449
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Summary The inclusion compounds of 1′, 3′, 3′-trimethyl-6-nitrospiro-[2H, 1-benzo-pyran-2, 2′-indoline] (NSP) with γ-cyclodextrin (γ-CD), 2,3,6,0-permethylated γ-CD (γ-MCD), and naphthyl modified γ-CD (γ-NCD) showed normal photochromism in the solid state with high light sensitivity comparable with that of NSP dispersed in polymer matrices. This is in sharp contrast with NSP in the crystalline state, which is much less photosensitive. These results suggest that the host cavity offers a sufficient free volume for phototransformation of the guest molecule. The colored form of the inclusion compounds were found to be more stable both chemically upon prolonged UV irradiation and thermally in the dark as compared with that in a PMMA film.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00395580
Permalink