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Triplet Lifetime Determination of Molecules in the Gas Phase by T‐T Energy Transfer
Author(s) -
Brühlmann Ueli,
Huber J. Robert
Publication year - 1981
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19810640709
Subject(s) - chemistry , torr , molecule , energy transfer , triplet state , gas phase , reaction rate constant , common emitter , benzaldehyde , phase (matter) , transfer (computing) , activation energy , atomic physics , analytical chemistry (journal) , photochemistry , chemical physics , kinetics , thermodynamics , organic chemistry , optoelectronics , catalysis , parallel computing , computer science , physics , quantum mechanics
It has been demonstrated that the triplet lifetime of nonemitting molecules in the dilute vapor phase ‐ even for complex triplet decays ‐ can be accurately determined by means of time‐resolved triplet‐triplet (T‐T) energy transfer to a strong emitter molecule. Besides the test molecules 1‐butyne‐3‐one and benzaldehyde the lifetime of the vibrationally relaxed nonemitting T 1 (nπ*) state of cycloheptanone, τ=63 ± 5 µs at ∼0.5 Torr, together with its energy transfer rate constant to biacetyl, k ET =(1.80±0.08) x 10 6 s −1 Torr −1 , have been measured.
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