Thermally assisted and heavy-atom assisted intersystem crossing in meso-substituted anthracenes

✍ Scribed by Herbert Dreeskamp; Joachim Pabst

• Book ID: 103018597
• Publisher: Elsevier Science
• Year: 1979
• Tongue: English
• Weight: 337 KB
• Volume: 61
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(79)80640-5

✦ Synopsis

Lcitrsttthl B fi P#tystkaLkk Chentie der T2chtiscItett tittiwmlrif Brattttschr eig. D-3300 Bmuttscht eig_ Gertttmt_v Receivrd 7 November I978 A singIe Iinear gorrelation between the activztion energy of St-T intersystem crossing and the iogxithm of the bimolecuhr ~uorexence quenching rate constant by hztIoal!unes for mcso-substituted anthmcenes in fluid solutions is estiblkhed-It is concluded ttit both the monomokcuhr znd the hcwy-atom-assisted dextivation of St depend in the smne usp on the change of Sr energy by substitution or solvent rekttive to the energy of the accepting triplet T,,. The anomalous increase of fluorescence of Br-substituted anthrxenes in hay-atom conhining solvents is consistent Bith a widening of the S, -Trr ener_w gzp due to the cbznging solvent_