Dyes as quenchers of singlet oxygen

✍ Scribed by R.Stephen Davidson; Julie E Pratt

• Book ID: 104221937
• Publisher: Elsevier Science
• Year: 1982
• Tongue: French
• Weight: 191 KB
• Volume: 23
• Category: Article
• ISSN: 0040-4039
• DOI: 10.1016/s0040-4039(00)88669-4

✦ Synopsis

The magnitude of solvent Isotope effects on the rate of the dye sensltlsed photo-oxldatlon of alkenes 1s dependent upon the nature and concentration of the dye An explanation, lnvolvlng quenching of singlet oxygen by the dye, 1s proposed Generation of singlet oxygen, for both preparative and kinetic studies, 1s often accomplished by the use of dyes as sensltlsers Klnetlc studies, using steady state and transient methods enable the determination of the lifetime of slnglct oxygen and the rate constant for its reaction with a substrate Values for the lifetime of singlet oxygen in a range of solvents are now available, but there are discrepancies between the values obtained from different lnvestlgatlons1'2'3'4 Recently: " life-