Abstract
The primary steps of triplet state (T 1) sensitization of singlet oxygen O 2( 1Σ + g) and O 2 ( 1Δ g) by phenalenone (PH) and benzophenone (BP) have been investigated in carbon tetrachloride by time-resolved measurements of the phosphorescence of T 1, O 2( 1Σ + g) and O 2( 1Δ g). Besides lifetimes, the detailed analysis of the transient curves yields absolute efficiencies a of O 2( 1Σ + g) and b of O 2( 1Δ g) formation in the primary energy transfer step from T 1 to O 2. For PH a= 0.62 and b=0.37, for BP a=0.11 and b=0.26 were found. Collisional deactivation of O 2( 1Σ + g) by carbon tetrachloride, benzene, cyclohexane, trimethylpentane and methanol produces O 2( 1Δ g) with efficiency c⩾0.95.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
