Redox photochromism in films of viologens and related compounds bearing long-chain alkyl groups
- Yamanashi Univ., Kofu (Japan)
1,1{prime}-Bis(benzyl or p-methylbenzyl)-4,4{prime}-bipyridinium and trans-4,4{prime}-vinylenebis(1-benzylpyridinium)bis-(p-alkylbenzenesulfonate)s bearing long-chain alkyl groups (viologen Ia,b), prepared from their respective dichlorides by the anion-exchange reaction, were sandwiched between two glass plates by melting to afford thin transparent and mainly isotropic films. These almost colorless or pale yellow films developed intense visible colors by near-UV irradiation, which bleached upon heating (photochromism). This behavior is considered to be due to reversible redox reactions consisting of the one-electron transfer to viologen Ia,b dication from the counteranion by the photon mode (color development) and vice versa by the heat mode (bleaching).
- OSTI ID:
- 7115559
- Journal Information:
- Chemistry of Materials; (United States), Journal Name: Chemistry of Materials; (United States) Vol. 3:6; ISSN CMATE; ISSN 0897-4756
- Country of Publication:
- United States
- Language:
- English
Similar Records
Pathways of viologen-mediated oxidation-reduction reactions across dihexadecyl phosphate bilayer membranes
Electrochemical investigations of product deposition and dissolution of the reduced forms of alkyl viologens on glassy carbon
Related Subjects
400500* -- Photochemistry
ABSORPTION SPECTROSCOPY
ALKYLATED AROMATICS
AMINES
AMMONIUM COMPOUNDS
AROMATICS
AZINES
CHEMICAL REACTIONS
CHEMISTRY
CHLORIDES
CHLORINE COMPOUNDS
DATA
ELECTROMAGNETIC RADIATION
ELECTRON SPIN RESONANCE
EXPERIMENTAL DATA
FILMS
HALIDES
HALOGEN COMPOUNDS
HETEROCYCLIC COMPOUNDS
INFORMATION
MAGNETIC RESONANCE
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDATION
PHOTOCHEMISTRY
PYRIDINES
PYRIDINIUM COMPOUNDS
QUATERNARY COMPOUNDS
RADIATIONS
REDUCTION
RESONANCE
SPECTROSCOPY
TEMPERATURE EFFECTS
THERMOCHEMICAL PROCESSES
ULTRAVIOLET RADIATION