The internal heavy-atom effect on 3-phenylselanyl and 3-phenyltellanyl BODIPY derivatives studied by transient absorption spectroscopy. Issue 2 (21st January 2016)

• Record Type: Journal Article
• Authors: Al Anshori, Jamaludin; Slanina, Tomáš; Palao, Eduardo; Klán, Petr
• Is Part Of: Photochemical & photobiological sciences. Volume 15:Issue 2(2016:Feb.)
• Page Start: 250
• Page End: 259
• Publication Date: 2016-01-21
• Subjects: Photochemistry -- Periodicals; Photobiology -- Periodicals; 541.35
• DOI: 10.1039/c5pp00366k
• Languages: English
• ISSNs: 1474-905X

Abstract

Abstract : The extent of intersystem crossing related to the heavy-atom effect of Se and Te atoms was investigated on monosubstituted 3-phenylselanyl and 3-phenyltellanyl BODIPY derivatives. Abstract : Three monosubstituted 3-phenylselanyl and 3-phenyltellanyl BODIPY derivatives were synthesized and their spectroscopic properties were characterized and compared to those of iodine and chlorine-atoms containing analogues as well as an unsubstituted BODIPY derivative. The fluorescence quantum yields were found to decrease, whereas the intersystem crossing quantum yields ( Φ ISC ), determined by transient spectroscopy, increased in the order of the H → Cl → Se/I → Te substitution. The maximum Φ ISC, found for the 3-phenyltellanyl derivative, was 59%. The results are interpreted in terms of the internal heavy-atom effect of the substituents.