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Molecular Crystals and Liquid Crystals Volume 431, 2005 - Issue 1
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Original Articles

Transient Absorption Investigation of the Photophysical Properties of Thiophene Linked [2H]-Chromenes

B. Moine Laboratoire de Spectrochimie Infrarouge et Raman, Centre d'Etudes et de Recherches Lasers et Applications, Université des Sciences et Technologies de Lille, Cedex, FranceCorrespondence[email protected]
,
G. Buntinx Laboratoire de Spectrochimie Infrarouge et Raman, Centre d'Etudes et de Recherches Lasers et Applications, Université des Sciences et Technologies de Lille, Cedex, France
,
O. Poizat Laboratoire de Spectrochimie Infrarouge et Raman, Centre d'Etudes et de Recherches Lasers et Applications, Université des Sciences et Technologies de Lille, Cedex, France
,
M. Frigoli Groupe de Chimie Organique et Matériaux Moléculaires, Université de la Méditerranée, Faculté des Sciences de Luminy, Marseille Cedex, France
,
C. Moustrou Groupe de Chimie Organique et Matériaux Moléculaires, Université de la Méditerranée, Faculté des Sciences de Luminy, Marseille Cedex, France
&
A. Samat Groupe de Chimie Organique et Matériaux Moléculaires, Université de la Méditerranée, Faculté des Sciences de Luminy, Marseille Cedex, France
Pages 363-368 | Published online: 31 Aug 2006
 
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ABSTRACT

The photophysical and photochemical properties of a bi-thiophene linked 2H-chromene are investigated by femtosecond and nanosecond transient absorption spectroscopy. The spectral characteristics and dynamics of the lowest excited singlet and triplet states are determined. The ring-opening reaction responsible for the photochromism is observed to occur in the S1 state with a time constant of about 150 ps in acetonitrile.

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