The interaction of singlet molecular oxygen O2(1Δg) with indolic derivatives. Distinction between physical and reactive quenching

✍ Scribed by M.C. Palumbo; N.A. García; Gustavo A. Argüello

• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 671 KB
• Volume: 7
• Category: Article
• ISSN: 1011-1344
• DOI: 10.1016/1011-1344(90)85141-i

✦ Synopsis

A number of indolic compounds were studied as quenchers of singlet molecular oxygen. O&A,) generated by photosensitization. The ratio of the chemical (reactive) and physical quenching paths was a function of the substitution pattern of the quencher. Indoles substituted in position 3 gave measurable reaction rates, whereas the parent indole and those derivatives substituted in other nuclear positions predominantly gave physical interaction.

The results are discussed in terms of the formation of an exciplex with partial polar character between OZ(lAg) and the indolic compound.