Journal
JOURNAL OF PHYSICAL CHEMISTRY A
Volume 119, Issue 45, Pages 11138-11145Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpca.5b08205
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Funding
- Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan [2406, 25107509, 2408, 15H00917]
- Grants-in-Aid for Scientific Research [25107509, 15H00917] Funding Source: KAKEN
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Cyclization reactions of three diarylethene derivatives, 1,2-bis(2-methyl-3-benzothienyl)-perfluorocydopentene), and 2-bis2-isor (BTHex 1, (p opyl-3-perfluorocydopentene (BT), 1,2-bis(2-hexyl-3-benzothienyl)-benzothienyl)perfluorocydopentene (BTiPr), via their excited triplet states were studied by means of steady-state and nanosecond transient absorption spectroscopy. The excited triplet states of BT, BTHex, and BTiPr were generated by energy transfer from the photoexcited triplet states of sensitizers such as xanthone, phenanthrene, and pyrene. The single-step quantum yields of the cydization reactions from the excited triplet states of BT, BTHex, and BTiPr were determined to be 0.34, 0.53, and 0.65, respectively. The triplet energies of these three BTs were estimated to be 190-200 kJ mol(-1).
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