Femtosecond transient absorption studies of diphenylpolyenes. Direct detection of S2 → S1 radiationless conversion in diphenylhexatriene and diphenyloctatetraene

Autor:	James W. Lewis, W. Atom Yee, Jin Z. Zhang, David S. Kliger, R. H. O’Neil
Rok vydání:	1997
Předmět:	Diphenylhexatriene Cyclohexane Analytical chemistry General Physics and Astronomy Photochemistry chemistry.chemical_compound Internal conversion chemistry Excited state Femtosecond Ultrafast laser spectroscopy Physical and Theoretical Chemistry Absorption (electromagnetic radiation) Excitation
Zdroj:	Chemical Physics Letters. 276:430-434
ISSN:	0009-2614
DOI:	10.1016/s0009-2614(97)00842-7
Popis:	Femtosecond transient absorption studies of diphenyloctatetraene (DPO), diphenylhexatriene (DPH), diphenylbutadiene (DPB), and 1,4-diphenyl-1,3-cyclopentadiene (DPCP) were performed in cyclohexane solution at room temperature using 390 nm excitation and probe wavelengths of 720 and 780 nm. Fast decay components observed in DPH and DPO are attributed to absorption by initially excited S2 with decay rates of ∼ 450–600 fs assigned to S2 → S1 internal conversion processes. No comparable fast decay components were observed in DPB and DPCP.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::62e282150656a61ad9ef9e9a8b66b784 https://doi.org/10.1016/s0009-2614(97)00842-7 Zobrazit plný text záznamu Full Text from ScienceDirect