On the effect of 1,4-diazabicyclo[2.2.2]octane on the singlet-oxygen dimol emission: photosensitized generation of (1O2)2

Dmitri V Kazakov; Reinhard Schmidt

doi:10.1021/jp070630o

On the effect of 1,4-diazabicyclo[2.2.2]octane on the singlet-oxygen dimol emission: photosensitized generation of (1O2)2

J Phys Chem A. 2007 May 24;111(20):4274-9. doi: 10.1021/jp070630o. Epub 2007 Apr 25.

Authors

Dmitri V Kazakov¹, Reinhard Schmidt

Affiliation

¹ Institute of Organic Chemistry, Ufa Scientific Center of the RAS, 71 Prospect Oktyabrya, 450054 Ufa, Russia. chemlum@ifanet.ru

PMID: 17455925
DOI: 10.1021/jp070630o

Abstract

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.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Photochemistry
Piperazines / chemistry*
Singlet Oxygen / chemistry*

Substances

Piperazines
Singlet Oxygen
triethylenediamine