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| HAL : hal-00424674, version 1 |
| DOI : 10.1021/jp901849a |
| Fiche détaillée |  Récupérer au format |
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| Journal of Physical Chemistry C 113 (2009) 11959-11968 |
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| Comparative investigation of ultrafast photoinduced processes in salicylidene-aminopyridine in solution and solid state |
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M. Sliwa 1, 2N. Mouton 1, 2 |
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| (2009) |
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| Photodynamics and excited-state intramolecular proton transfer (ESIPT) of N-(3,5-ditert-butylsalicylidene)-4-aminopyridine (4P) and N-(3,5-ditert-butylsalicylidene)-2-aminopyridine (2P) are studied by steady-state and transient optical spectroscopy in solution and solid state (microcrystalline powder). These two compounds are representative of anils Classes A and B, respectively. The results confirm that in solution both compounds have a similar dynamic behavior: upon excitation at 390 nm, ESIPT leads to different cis-keto* fluorescent species which relax to the photochromic trans-keto photoproduct within a few tens of picoseconds. Furthermore, for the first time, picosecond data are recorded for the two classes of anils in the solid state: in 2P, two cis-keto* fluorescent excited state species (23 and 250 ps lifetime) are relaxing exclusively to the cis-keto ground state, whereas in 4P, a single cis-keto* fluorescent species is observed which leads to the trans-keto photoproduct in 250 ps via an intermediate metastable species. |
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| 1 : | LAboratoire de Spectrochimie Infrarouge et Raman (LASIR) |
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Université Lille I - Sciences et technologies – CNRS : UMR8516 |
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| 2 : | Centre d'Etudes et de Recherches Lasers et Applications (CERLA) |
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Université Lille I - Sciences et technologies |
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| 3 : | Laboratoire de Photophysique et Photochimie Supramoléculaires et Macromoléculaires (PPSM) |
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CNRS : UMR8531 – École normale supérieure de Cachan - ENS Cachan |
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| 4 : | Graduate School of Materials Science |
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Nara Institute os Science and Technology |
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| 5 : | Department of Applied Physics |
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Osaka University |
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| Domaine | : | Chimie/Chimie théorique et/ou physique |
| hal-00424674, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00424674 | |
| oai:hal.archives-ouvertes.fr:hal-00424674 | |
| Contributeur : Emilie De Paepe | |
| Soumis le : Vendredi 16 Octobre 2009, 17:19:13 | |
| Dernière modification le : Vendredi 16 Octobre 2009, 17:19:13 | |
