Environmental effects on singlet-triplet transitions in aromatic molecules

✍ Scribed by C. Dijkgraaf; G.J. Hoijtink

• Book ID: 104207206
• Publisher: Elsevier Science
• Year: 1963
• Tongue: French
• Weight: 441 KB
• Volume: 19
• Category: Article
• ISSN: 0040-4020
• DOI: 10.1016/s0040-4020(63)80015-0

✦ Synopsis

Recent interpretations of Evans' experiments on the oxygen-induced singlet-triplet transitions in aromatic molecules are briefly discussed.

In addition to the oxygen-induced singlet-triplet absorption for naphthalene there is a second absorption band which is possibly due to a simultaneous transition, i.e. a transition of the aromatic molecule from the ground state to the lowest triplet excited state and the 3 g~----~ Id transition of the oxygen molecule.

Singlet-triplet transitions can also be stimulated by solvents containing heavy atoms. The results are shown for naphthalene, pyrene and fluoranthene with the solvents ethyl iodide, bromoform and iodobenzene.

A qualitative discussion is given.