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The quenching of anthracene triplets by ground-state anthracene
The first-order decay constant, k dt, of anthracene triplets, 3A*, in benzene depends linearly on ground-state anthracene, 1A, concentration: k dt = k dt o + k sq[ 1A], where k dt o = 49 ± 12 s −1 and k sq = (3.19 ± 0.10) × 10 5 M −1 s −1 at 23°C. The actual involvement of 1A in the quenching proces...
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| Published in: | Chemical physics letters 1983-01, Vol.100 (3), p.219-222 |
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| Main Authors: | , , , |
| Format: | Article |
| Language: | English |
| Citations: | Items that this one cites Items that cite this one |
| Online Access: | Get full text |
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| Summary: | The first-order decay constant,
k
dt, of anthracene triplets,
3A*, in benzene depends linearly on ground-state anthracene,
1A, concentration:
k
dt =
k
dt
o +
k
sq[
1A], where
k
dt
o = 49 ± 12 s
−1 and
k
sq = (3.19 ± 0.10) × 10
5 M
−1 s
−1 at 23°C. The actual involvement of
1A in the quenching process is unequivocally established by varying [
1A] in situ through a sequence of partial photodimerization steps. The temperature dependence of
k
sq being normal,
k
sq = 3.89 × 10
8 exp (−4.19/
RT), while not precluding it, does not require formation of triplet anthracene excimer. Less extensive but similar results are reported with cyclohexane and ethanol as solvents. |
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| ISSN: | 0009-2614 1873-4448 |
| DOI: | 10.1016/0009-2614(83)87279-0 |