Electrogeneration of triplet states of intramolecular anthracene-amine systems
โ Scribed by R. Ziebig; F. Pragst
- Publisher
- Elsevier Science
- Year
- 1980
- Tongue
- English
- Weight
- 345 KB
- Volume
- 70
- Category
- Article
- ISSN
- 0009-2614
No coin nor oath required. For personal study only.
โฆ Synopsis
In the electron trancfer bctwcen the catlon ralcals
Ah D+or A MD+of the amme moiety of four mtramolecular anthracene-anune systems and the amon ralcals B-of some heterocychc and carbonyl compounds In acetomtrde/toluene, the tnplet state of the anthraccne moiety 3A h D or 3AMD IS formed As mtermedlates m thrs process, mtramolecular and mtermolecular tnplet e~c~plews 3A%'J or 3(A%+) and 3(B-D3 A or 3
๐ SIMILAR VOLUMES
The lowest triplet state infrared spectrum of matrix-isolated anthracene between 1650 and 550 cm-' is reported. The seven triplet state bands were tentatively assigned based on frequency proximity to ground state absorptions and comparisons with triplet state features in similar molecules.
The mechanism of fluorescence quenching of anthracene by dimethylmercury, tetramethyllead end tetramethyltin has been examined by fluorescence and flash photolysis measurements. The increased rates OF SI -T, and TI -S6 Intersystem-crossings induced by the heavy-atom molecules are discussed
A picosecond-her study of tour carbonyl dcrlvativcs of mthraccnc ~I.I\ rcvealetl that the lowest triplet states arc populated very rapidly. first order rate constants king between 5 X IO9 and 10" <' . Iiowcver, the observed r.ltc constants of triplet population arc assigned to those of the mtcrnal c