FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W1837255544> ?p ?o ?g. }

• W1837255544 endingPage "14924" @default.
• W1837255544 startingPage "14905" @default.
• W1837255544 abstract "Femtosecond transient-grating spectroscopy with heterodyne detection was employed to characterize the nonradiative decay pathway in β-carotene from the S2 (11Bu+) state to the S1 (21Ag–) state in benzonitrile solution. The results indicate definitively that the S2 state populates an intermediate state, Sx, on an ultrafast time scale prior to nonradiative decay to the S1 state. Numerical simulations using the response function formalism and the multimode Brownian oscillator model were used to fit the absorption and dispersion components of the transient-grating signal with a common set of parameters for all of the relevant Feynman pathways, including double-quantum coherences. The requirement for inclusion of the Sx state in the nonradiative decay pathway is the observed fast rise time of the dispersion component, which is predominantly controlled by the decay of the stimulated emission signal from the optically prepared S2 state. The finding that the excited-state absorption spectrum from the Sx state is significantly red-shifted from that of S2 and S1 leads to a new assignment for the spectroscopic origin of the Sx state. Rather than assigning Sx to a discrete electronic state, such as the 1Bu– state suggested in previous work, it is proposed that the Sx state corresponds to a transition-state-like structure on the S2 potential surface. In this hypothesis, the 12 fs time constant for the decay of the S2 state corresponds to a vibrational displacement of the C—C and C═C bond-length alternation coordinates of the conjugated polyene backbone from the optically prepared Franck–Condon structure to a potential energy barrier on the S2 surface that divides planar and torsionally displaced structures. The lifetime of the Sx state would be associated with a subsequent relaxation along torsional coordinates over a steep potential energy gradient toward a conical intersection with the S1 state. This hypothesis leads to the idea that twisted structures with intramolecular charge-transfer character along the S2 torsional gradient are active in excitation energy-transfer mechanisms to (bacterio)chlorophyll acceptors." @default.
• W1837255544 created "2016-06-24" @default.
• W1837255544 creator A5000055068 @default.
• W1837255544 creator A5005702206 @default.
• W1837255544 creator A5006938084 @default.
• W1837255544 creator A5007157426 @default.
• W1837255544 creator A5024219598 @default.
• W1837255544 creator A5075083607 @default.
• W1837255544 creator A5075410289 @default.
• W1837255544 creator A5080580467 @default.
• W1837255544 date "2015-11-12" @default.
• W1837255544 modified "2023-09-23" @default.
• W1837255544 title "Femtosecond Heterodyne Transient-Grating Studies of Nonradiative Decay of the S₂ (1¹B_u⁺) State of β-Carotene: Contributions from Dark Intermediates and Double-Quantum Coherences" @default.
• W1837255544 cites W1044363188 @default.
• W1837255544 cites W1841868763 @default.
• W1837255544 cites W1899027455 @default.
• W1837255544 cites W1964068845 @default.
• W1837255544 cites W1964524553 @default.
• W1837255544 cites W1975728089 @default.
• W1837255544 cites W1976605133 @default.
• W1837255544 cites W1976892738 @default.
• W1837255544 cites W1981353021 @default.
• W1837255544 cites W1982591311 @default.
• W1837255544 cites W1987047380 @default.
• W1837255544 cites W1992271131 @default.
• W1837255544 cites W1994039402 @default.
• W1837255544 cites W1997409282 @default.
• W1837255544 cites W1998260932 @default.
• W1837255544 cites W2000374082 @default.
• W1837255544 cites W2002310403 @default.
• W1837255544 cites W2005054312 @default.
• W1837255544 cites W2010056946 @default.
• W1837255544 cites W2013038051 @default.
• W1837255544 cites W2013278850 @default.
• W1837255544 cites W2014346308 @default.
• W1837255544 cites W2019201607 @default.
• W1837255544 cites W2020970089 @default.
• W1837255544 cites W2021997226 @default.
• W1837255544 cites W2024509728 @default.
• W1837255544 cites W2026154956 @default.
• W1837255544 cites W2027886692 @default.
• W1837255544 cites W2028390765 @default.
• W1837255544 cites W2029133059 @default.
• W1837255544 cites W2029941106 @default.
• W1837255544 cites W2039929450 @default.
• W1837255544 cites W2041521799 @default.
• W1837255544 cites W2044613099 @default.
• W1837255544 cites W2046082701 @default.
• W1837255544 cites W2046092966 @default.
• W1837255544 cites W2047187990 @default.
• W1837255544 cites W2049247543 @default.
• W1837255544 cites W2054740497 @default.
• W1837255544 cites W2055442639 @default.
• W1837255544 cites W2055961050 @default.
• W1837255544 cites W2056085146 @default.
• W1837255544 cites W2062930226 @default.
• W1837255544 cites W2063461279 @default.
• W1837255544 cites W2066051927 @default.
• W1837255544 cites W2068110212 @default.
• W1837255544 cites W2069980955 @default.
• W1837255544 cites W2071349730 @default.
• W1837255544 cites W2071956622 @default.
• W1837255544 cites W2073537842 @default.
• W1837255544 cites W2075547783 @default.
• W1837255544 cites W2077444299 @default.
• W1837255544 cites W2088166539 @default.
• W1837255544 cites W2090078926 @default.
• W1837255544 cites W2092154952 @default.
• W1837255544 cites W2094957715 @default.
• W1837255544 cites W2098559262 @default.
• W1837255544 cites W2106062711 @default.
• W1837255544 cites W2113141616 @default.
• W1837255544 cites W2121324859 @default.
• W1837255544 cites W2123789809 @default.
• W1837255544 cites W2124442906 @default.
• W1837255544 cites W2127641314 @default.
• W1837255544 cites W2127821828 @default.
• W1837255544 cites W2150407957 @default.
• W1837255544 cites W2313913153 @default.
• W1837255544 cites W2316800669 @default.
• W1837255544 cites W2318666685 @default.
• W1837255544 cites W2320277517 @default.
• W1837255544 cites W2320457752 @default.
• W1837255544 cites W2333792660 @default.
• W1837255544 cites W2334595233 @default.
• W1837255544 cites W2335178769 @default.
• W1837255544 cites W2343217850 @default.
• W1837255544 cites W412672287 @default.
• W1837255544 cites W4294990658 @default.
• W1837255544 doi "https://doi.org/10.1021/acs.jpcb.5b09405" @default.
• W1837255544 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/26505493" @default.
• W1837255544 hasPublicationYear "2015" @default.
• W1837255544 type Work @default.
• W1837255544 sameAs 1837255544 @default.
• W1837255544 citedByCount "19" @default.
• W1837255544 countsByYear W18372555442016 @default.
• W1837255544 countsByYear W18372555442017 @default.
• W1837255544 countsByYear W18372555442018 @default.

• next