On the effect of 1,4-diazabicyclo[2.2.2]octane on the singlet-oxygen dimol emission: photosensitized generation of (1O2)2.
Time-resolved singlet-oxygen dimol luminescence has been recorded upon laser-pulsed photosensitization of singlet oxygen by 2-acetonaphthone or 1-H-phenalen-1-one in perfluorobenzene, perdeuterobenzene, and perdeuteroacetonitrile. It is shown that 1,4-diazabicyclo[2.2.2]octane (DABCO) does not enhance radiative properties of the dimol species generated by the photosensitization. Instead, DABCO strongly reduces the singlet-oxygen dimol luminescence. Rate constants for the quenching of the dimol luminescence by DABCO have been determined for the three solvents used.
Kazakov
Dmitri V
DV
Institute of Organic Chemistry, Ufa Scientific Center of the RAS, 71 Prospect Oktyabrya, 450054 Ufa, Russia. chemlum@ifanet.ru
Schmidt
Reinhard
R
D010777:Photochemistry; D010879:Piperazines / Q000737:chemistry*; D026082:Singlet Oxygen / Q000737:chemistry*
D010879:Piperazines; D026082:Singlet Oxygen; C007306:triethylenediamine