Equilibration of an excited charge-transfer state of molecular electron-donor—acceptor systems in liquid solution
✍ Scribed by E. Gawécda; J. Prochorow
- Publisher
- Elsevier Science
- Year
- 1975
- Tongue
- English
- Weight
- 536 KB
- Volume
- 30
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
is demonstmted that in the molecular electrondonor-acceptor system of sym.tetracyanobenzene with pus-xylene, both ground-state and stable cxcitedkate complexes can be formed. Measurements of the decay times of fIuorcsocnce and investigation of the influence of solvent polarity on the fluorescence spectra have revealed the identity of fluorescent states cf complexes of bcth kinds.
📜 SIMILAR VOLUMES
Donor-acceptor compounds containing a phenylenediamine electron donor and a naphthalene, a cyanobenzene, or a cyanonaphthalene acceptor were studied. The two chromophores are connected by three different bridging units, consisting of CH 2 groups linked to a semiflexible piperidine or piperazine ring
## Anomalously large Stokes shifts (10 000 -20 000 cm-') and fluorescence decay times (lo-\* -10s5 set)
The hyperfine tensors of the triplet states of several guest donor molecules in naphthaleneitetracyanobenzene host crystals have been measured by EPR s~ctroscopy. From these data the degree of charge transfer (6') in the excited state can be derived. in a straightforward way. Whereas anthracene yieI