Matches in SemOpenAlex for { <https://semopenalex.org/work/W2023889905> ?p ?o ?g. }
- W2023889905 endingPage "238" @default.
- W2023889905 startingPage "231" @default.
- W2023889905 abstract "The photophysics of all-trans-retinoic acid (ATRA) in methanol solution and of the system comprising ATRA chemisorbed to nanoparticulate TiO2 have been examined in methanol solution and in aqueous dispersion (pH = 7), respectively. We found evidence for two closely spaced singlet excited states of ATRA, tentatively assigned as n−π* and π−π*, with the former primarily responsible for ATRA fluorescence. The lifetime for this 1(n−π*) state in methanol solution is (55 ± 3) ps. The principal decay pathway of ATRA observable by picosecond transient absorption spectroscopy is photoionization. Under our conditions, photoionization is monophotonic and proceeds directly from the S1 state of ATRA, yielding the corresponding radical cation, ATRA·+. Electrochemical characterization of ATRA by square wave voltammetry supports this interpretation. ATRA chemisorbs to TiO2 at pH 7 in large part by deprotonation, i.e., it is present on the anatase surface as the conjugate anion of ATRA. This species is much more fluorescent than free ATRA in solution. On laser flash photolysis at 355 nm, the principal observable photoproduct was deep trapped electrons in TiO2. Unlike the TiO2 preparation without ATRA, these species appear only slowly after photoexcitation. A mechanism is proposed, whereby chemisorbed ATRA quenches the initially photoexcited TiO2 by energy transfer, followed by rate-limiting injection of electrons into the conduction band of TiO2. The photoholes remain trapped in the ATRA." @default.
- W2023889905 created "2016-06-24" @default.
- W2023889905 creator A5019781033 @default.
- W2023889905 creator A5039234814 @default.
- W2023889905 date "1998-06-01" @default.
- W2023889905 modified "2023-09-30" @default.
- W2023889905 title "Photophysics of all-trans-retinoic acid (ATRA) chemisorbed to nanoparticulate TiO2: Evidence for TiO2* to ATRA energy transfer and reverse electron transfer sensitisation" @default.
- W2023889905 cites W128722722 @default.
- W2023889905 cites W1508762865 @default.
- W2023889905 cites W1726956448 @default.
- W2023889905 cites W1965678124 @default.
- W2023889905 cites W1966000765 @default.
- W2023889905 cites W1969954653 @default.
- W2023889905 cites W1971772652 @default.
- W2023889905 cites W1977926599 @default.
- W2023889905 cites W1986802380 @default.
- W2023889905 cites W1987741147 @default.
- W2023889905 cites W1988839922 @default.
- W2023889905 cites W1990718871 @default.
- W2023889905 cites W1992916990 @default.
- W2023889905 cites W1995173156 @default.
- W2023889905 cites W1997426410 @default.
- W2023889905 cites W1997772174 @default.
- W2023889905 cites W2015677612 @default.
- W2023889905 cites W2021553677 @default.
- W2023889905 cites W2023934941 @default.
- W2023889905 cites W2029051987 @default.
- W2023889905 cites W2034382046 @default.
- W2023889905 cites W2034646979 @default.
- W2023889905 cites W2036847232 @default.
- W2023889905 cites W2056284096 @default.
- W2023889905 cites W2056799861 @default.
- W2023889905 cites W2064510980 @default.
- W2023889905 cites W2073079183 @default.
- W2023889905 cites W2074455832 @default.
- W2023889905 cites W2074915413 @default.
- W2023889905 cites W2084082836 @default.
- W2023889905 cites W2087061873 @default.
- W2023889905 cites W2088088579 @default.
- W2023889905 cites W2088728031 @default.
- W2023889905 cites W2106703905 @default.
- W2023889905 cites W2141246535 @default.
- W2023889905 cites W2158080505 @default.
- W2023889905 cites W2332275848 @default.
- W2023889905 cites W2949680301 @default.
- W2023889905 doi "https://doi.org/10.1016/s1010-6030(98)00250-0" @default.
- W2023889905 hasPublicationYear "1998" @default.
- W2023889905 type Work @default.
- W2023889905 sameAs 2023889905 @default.
- W2023889905 citedByCount "9" @default.
- W2023889905 countsByYear W20238899052013 @default.
- W2023889905 countsByYear W20238899052015 @default.
- W2023889905 countsByYear W20238899052019 @default.
- W2023889905 countsByYear W20238899052023 @default.
- W2023889905 crossrefType "journal-article" @default.
- W2023889905 hasAuthorship W2023889905A5019781033 @default.
- W2023889905 hasAuthorship W2023889905A5039234814 @default.
- W2023889905 hasConcept C118629725 @default.
- W2023889905 hasConcept C121332964 @default.
- W2023889905 hasConcept C123669783 @default.
- W2023889905 hasConcept C145148216 @default.
- W2023889905 hasConcept C158749347 @default.
- W2023889905 hasConcept C178790620 @default.
- W2023889905 hasConcept C185592680 @default.
- W2023889905 hasConcept C198291218 @default.
- W2023889905 hasConcept C32891209 @default.
- W2023889905 hasConcept C62520636 @default.
- W2023889905 hasConcept C75473681 @default.
- W2023889905 hasConcept C95503338 @default.
- W2023889905 hasConceptScore W2023889905C118629725 @default.
- W2023889905 hasConceptScore W2023889905C121332964 @default.
- W2023889905 hasConceptScore W2023889905C123669783 @default.
- W2023889905 hasConceptScore W2023889905C145148216 @default.
- W2023889905 hasConceptScore W2023889905C158749347 @default.
- W2023889905 hasConceptScore W2023889905C178790620 @default.
- W2023889905 hasConceptScore W2023889905C185592680 @default.
- W2023889905 hasConceptScore W2023889905C198291218 @default.
- W2023889905 hasConceptScore W2023889905C32891209 @default.
- W2023889905 hasConceptScore W2023889905C62520636 @default.
- W2023889905 hasConceptScore W2023889905C75473681 @default.
- W2023889905 hasConceptScore W2023889905C95503338 @default.
- W2023889905 hasIssue "3" @default.
- W2023889905 hasLocation W20238899051 @default.
- W2023889905 hasOpenAccess W2023889905 @default.
- W2023889905 hasPrimaryLocation W20238899051 @default.
- W2023889905 hasRelatedWork W1971970902 @default.
- W2023889905 hasRelatedWork W1975374882 @default.
- W2023889905 hasRelatedWork W1976250521 @default.
- W2023889905 hasRelatedWork W2028372877 @default.
- W2023889905 hasRelatedWork W2064942795 @default.
- W2023889905 hasRelatedWork W2069330208 @default.
- W2023889905 hasRelatedWork W2088735407 @default.
- W2023889905 hasRelatedWork W2091175789 @default.
- W2023889905 hasRelatedWork W2463708132 @default.
- W2023889905 hasRelatedWork W4239711731 @default.
- W2023889905 hasVolume "115" @default.
- W2023889905 isParatext "false" @default.
- W2023889905 isRetracted "false" @default.