Femto/Picosecond Transient Absorption Spectroscopy of Photochromic 3,3-Diphenylnaphtho[2,1-b]pyran
作者:
J. Aubard,
F. Maurel,
G. Buntinx,
O. Poizat,
G. Levi,
R. Guglielmetti,
A. Samat,
期刊:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals
(Taylor Available online 2000)
卷期:
Volume 345,
issue 1
页码: 215-220
ISSN:1058-725X
年代: 2000
DOI:10.1080/10587250008023921
出版商: Taylor & Francis Group
关键词: fs spectroscopy;diphenylnaphthopyran;opening mechanism
数据来源: Taylor
摘要:
Transient absorption spectroscopy with femtosecond time resolution was used to probe the photochemical ring opening process of 3,3-diphenylnaphtho[2,1-b] pyran in solution. Analysis of the temporal evolution of the spectra from 0.4 ps to 100 ps has allowed us to detect and identify some of the intermediates involved in the photochemical formation of colored photomerocyanine isomers. From these data and those of recentab initioand semi-empirical calculations on related photochromic systems, a simple mechanistic model was proposed for the ring opening/closing reaction in room temperature solution.
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