SPREITZER, H and DAUB, J (1995) FUNCTIONAL DYES FOR MOLECULAR SWITCHING - DIHYDROAZULENE/VINYLHEPTAFULVENE PHOTOCHROMISM - EFFECT OF PI-ARYLENES ON THE SWITCHING BEHAVIOR. LIEBIGS ANNALEN-RECUEIL (9). pp. 1637-1641. ISSN 0947-3440,
Full text not available from this repository.Abstract
The reversible interconversion of dihydroazulene (DHA) and vinylheptafulvene (VHF) can be utilized to switch a number of physical properties. This communication reports on a fluorescent switch. By a multistep sequence involving an [8 + 2] cycloaddition route 9-anthracenyl-1,4-phenylene was covalently attached to C-2 of the DHA chromophore affording DHA-1 which undergoes complete and clean photochemical ring opening to vinylheptafulvene VHF-1. The latter is thermally reverted to DHA-1. The kinetics and the energetics of the thermal back reaction are discussed. On/off switching of luminescence was investigated: DHA-1 displays fluorescence whereas VHF-1 is nonfluorescent at ambient temperature.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | INVERSE RING-POLARIZATION; ELECTRONICS; DIHYDROAZULENES; LUMINESCENCE; FULVENES; THERMAL AND PHOTOCHEMICAL ELECTROCYCLIZATION REACTIONS; PHOTOCHROMISM; MOLECULAR SWITCHING; LUMINESCENT PROPERTIES |
| Depositing User: | Dr. Gernot Deinzer |
| Last Modified: | 19 Oct 2022 08:37 |
| URI: | https://pred.uni-regensburg.de/id/eprint/52363 |
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