Properties of the Triplet State of N,N,Nî,Nî‐Tetraethyloxonine | Zendy

Kamat Prashant V. | Zendy; Lichtin Norman N. | Zendy

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Properties of the Triplet State of N,N,Nî,Nî‐Tetraethyloxonine

Author(s) -

Kamat Prashant V.,

Lichtin Norman N.

Publication year - 1982

Publication title -

israel journal of chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.908

H-Index - 54

eISSN - 1869-5868

pISSN - 0021-2148

DOI - 10.1002/ijch.198200022

Subject(s) - chemistry , quenching (fluorescence) , flash photolysis , photochemistry , electron transfer , triplet state , analytical chemistry (journal) , fluorescence , kinetics , molecule , reaction rate constant , organic chemistry , physics , quantum mechanics

The triplet state of N,N,Nî,Nî‐tetraethyloxonine, TEO + generated by means of sensitization with 9,10‐dibromoanthracene, was investigated in ethanol solution by laser flash photolysis‐kinetic spectrometry employing the first harmonic of a Q‐switched ruby laser at 347.2 nm. Quenching of both the protonated triplet, TEOH 2+ (T 1 ), τ = 47 μs, and the unprotonated triplet, TEO + (T 1 ), τ = 285 μs, by TEO + (S 0 ) proceeds with substantial net electron transfer. No net electron transfer is detectable in the quenching of TEOH 2+ (T 1 ), and TEO + (T 1 ) by O 2 or 1,3,5,7‐cyclooctatetraene, processes which apparently involve transfer of energy. Specific rates of quenching are reported and the implications of the quenching processes for stability of TEO + in devices for conversion or storage of solar energy are discussed.

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