Two-step Laser Excitation Fluorescence Research Articles

Two-step laser excitation of 3-hydroxyflavone with stimulated-emission pumping

The effect of stimulated-emission pumping (SEP) on the two-step laser excitation (TSLE) fluorescence of 3-hydroxyflavone in 3-methylpentane solution has been investigated. The results presented contradict the idea of a long-lived ground-state tautomer as a species responsible for TSLE fluorescence. An alternative mechanism involving the triplet-triplet absorption followed by the excited triplet-singlet intersystem crossing is discussed.

Photochemistry of transient tautomer of 7-azaindole hydrogen-bonded dimer studied by two-step laser excitation fluorescence measurements

Photochemistry of transient tautomer of 7-azaindole hydrogen-bonded dimer studied by two-step laser excitation fluorescence measurements

ChemInform Abstract: Two‐Step Laser Excitation Fluorescence Study of the Ground‐ and Excited‐State Proton Transfer in Alcohol Solutions of 7‐Hydroxyisoflavone

ChemInformVolume 18, Issue 5 Physical Organic Chemistry ChemInform Abstract: Two-Step Laser Excitation Fluorescence Study of the Ground- and Excited-State Proton Transfer in Alcohol Solutions of 7-Hydroxyisoflavone M. ITOH, M. ITOH Fac. Pharm. Sci., Kanazawa Univ., Kanazawa 920, Jap.Search for more papers by this authorK. HASEGAWA, K. HASEGAWA Fac. Pharm. Sci., Kanazawa Univ., Kanazawa 920, Jap.Search for more papers by this authorY. FUJIWARA, Y. FUJIWARA Fac. Pharm. Sci., Kanazawa Univ., Kanazawa 920, Jap.Search for more papers by this author M. ITOH, M. ITOH Fac. Pharm. Sci., Kanazawa Univ., Kanazawa 920, Jap.Search for more papers by this authorK. HASEGAWA, K. HASEGAWA Fac. Pharm. Sci., Kanazawa Univ., Kanazawa 920, Jap.Search for more papers by this authorY. FUJIWARA, Y. FUJIWARA Fac. Pharm. Sci., Kanazawa Univ., Kanazawa 920, Jap.Search for more papers by this author First published: February 3, 1987 https://doi.org/10.1002/chin.198705043Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat No abstract is available for this article. Volume18, Issue5February 3, 1987 RelatedInformation

Magnetic Field Effects on the Primary Photoprocess of Anthrone in Micellar Solution by Laser Flash Photolysis and Two-Step Laser Excitation Fluorescence

Abstract The magnetic field effects on hydrogen abstraction reaction of anthrone have been studied in micellar solution by laser flash photolysis and two-step laser excitation (TSLE) fluorescence. The decaytime of the anthrone ketyl radical determined by laser flash photolysis increases from 370 ns at zero field to 890 ns at 80 mT. The results are in accordance with the magnetic field effects on the risetime of the cage product by the TSLE fluorescence. All of the results are discussed in terms of the radical pair model.

The ground state tautomer in the excited state relaxation process of 3-hydroxyflavone at room temperature

Very recently, the ground state reverse proton transfer in 3-hydroxyflavone (3-HF) has been reported to take place within 30 ps by picosecond transient absorption spectroscopy by Aartsma and co-workers. Here we present evidence of intervention of a long-lived ground state tautomer involved in the excited state relaxation process of 3-HF by transient absorption and two-step laser excitation fluorescence spectroscopy.

Two-step laser excitation fluorescence study of the ground- and excited-state proton transfer in alcohol solutions of 7-hydroxyisoflavone

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTwo-step laser excitation fluorescence study of the ground- and excited-state proton transfer in alcohol solutions of 7-hydroxyisoflavoneMichiya. Itoh, Kiyoshi. Hasegawa, and Yoshihisa. FujiwaraCite this: J. Am. Chem. Soc. 1986, 108, 19, 5853–5857Publication Date (Print):September 1, 1986Publication History Published online1 May 2002Published inissue 1 September 1986https://doi.org/10.1021/ja00279a032RIGHTS & PERMISSIONSArticle Views96Altmetric-Citations15LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (655 KB) Get e-Alerts Get e-Alerts

Doublet-doublet fluorescence and coupling reactions of 9-anthrylmethyl radical in fluid hexane solution studied by two-step laser excitation fluorescence spectroscopy

Doublet-doublet fluorescence and coupling reactions of 9-anthrylmethyl radical in fluid hexane solution studied by two-step laser excitation fluorescence spectroscopy

ChemInform Abstract: Two‐Step Laser Excitation Fluorescence Study of the Reactions of the l‐Naphthylmethyl Radical Produced in the 248‐nm KrF Laser Photolysis of l‐(Chloromethyl)naphthalene in Hexane at Room Temperature.

Chemischer InformationsdienstVolume 17, Issue 11 Preparative Organic Chemistry ChemInform Abstract: Two-Step Laser Excitation Fluorescence Study of the Reactions of the l-Naphthylmethyl Radical Produced in the 248-nm KrF Laser Photolysis of l-(Chloromethyl)naphthalene in Hexane at Room Temperature. K. TOKUMURA, K. TOKUMURASearch for more papers by this authorM. UDAGAWA, M. UDAGAWASearch for more papers by this authorM. ITOH, M. ITOHSearch for more papers by this author K. TOKUMURA, K. TOKUMURASearch for more papers by this authorM. UDAGAWA, M. UDAGAWASearch for more papers by this authorM. ITOH, M. ITOHSearch for more papers by this author First published: March 18, 1986 https://doi.org/10.1002/chin.198611112AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat No abstract is available for this article. Volume17, Issue11March 18, 1986 RelatedInformation

Two-step laser excitation fluorescence study of the reactions of the 1-naphthylmethyl radical produced in the 248-nm krypton fluoride laser photolysis of 1-(chloromethyl)naphthalene in hexane at room temperature

Two-step laser excitation fluorescence study of the reactions of the 1-naphthylmethyl radical produced in the 248-nm krypton fluoride laser photolysis of 1-(chloromethyl)naphthalene in hexane at room temperature

ChemInform Abstract: TRANSIENT ABSORPTION AND TWO‐STEP LASER EXCITATION FLUORESCENCE STUDIES OF PHOTOISOMERIZATION IN 2‐(2‐HYDROXYPHENYL)BENZOXAZOLE AND 2‐(2‐HYDROXYPHENYL)BENZOTHIAZOLE

Chemischer InformationsdienstVolume 16, Issue 30 Preparative Organic Chemistry ChemInform Abstract: TRANSIENT ABSORPTION AND TWO-STEP LASER EXCITATION FLUORESCENCE STUDIES OF PHOTOISOMERIZATION IN 2-(2-HYDROXYPHENYL)BENZOXAZOLE AND 2-(2-HYDROXYPHENYL)BENZOTHIAZOLE M. ITOH, M. ITOHSearch for more papers by this authorY. FUJIWARA, Y. FUJIWARASearch for more papers by this author M. ITOH, M. ITOHSearch for more papers by this authorY. FUJIWARA, Y. FUJIWARASearch for more papers by this author First published: July 30, 1985 https://doi.org/10.1002/chin.198530112AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat No abstract is available for this article. Volume16, Issue30July 30, 1985 RelatedInformation

Transient absorption and two-step laser excitation fluorescence studies of photoisomerization in 2-(2-hydroxyphenyl)benzoxazole and 2-(2-hydroxyphenyl)benzothiazole

Observation de bandes d'absorption transitoire a 390-450 et 420-480 nm respectivement pour l'hydroxy-2' phenyl-2 benzooxazole (HBO) et l'hydroxy-2' phenyl-2 benzothiazole (HBT). Donnees cinetiques. Ces bandes sont attribuees aux phototautomeres respectifs generes par le transfert de proton intramoleculaire a l'etat excite et par la relaxation de la fluorescence. On suggere qu'il y a deux phototautomeres a l'etat fondamental de HBT et seulement un phototautomere pour HBO. Comparaison de ces phototaumeres

MAGNETIC FIELD EFFECT ON THE INTRAMOLECULAR HYDROGEN ABSTRACTION REACTION OF n-TETRADECYL ANTHRAQUINONE-2-CARBOXYLATE

Abstract The magnetic field effect on the intramolecular hydrogen abstraction of n-tetradecyl anthraquinone-2-carboxylate was studied in aerated 1,1,2-trichlorotrifluoroethane, using steady-state photolysis, two-step laser excitation fluorescence, and laser flash photolysis.

Two-step laser excitation fluorescence study of the magnetic field effect on the hydrogen abstraction reaction of anthraquinone in SDS micellar solution

The magnetic field effect on the hydrogen abstraction reaction of anthraquinone in sodium dodecyl sulfate (SDS) micellar solution has been studied by two-step laser excitation fluorescence including a variable delay technique. The risetime of the “cage product” is 380 ns at 0 G and 890 ns at 800 G, while its yield decreases by 20% at 800 G. The results are interpreted in terms of the radical pair model of CIDNP.

ChemInform Abstract: TRANSIENT ABSORPTION AND TWO‐STEP LASER EXCITATION FLUORESCENCE STUDIES OF THE EXCITED‐STATE PROTON TRANSFER AND RELAXATION IN THE METHANOL SOLUTION OF 7‐HYDROXYFLAVONE

Chemischer InformationsdienstVolume 15, Issue 46 Physical Organic Chemistry ChemInform Abstract: TRANSIENT ABSORPTION AND TWO-STEP LASER EXCITATION FLUORESCENCE STUDIES OF THE EXCITED-STATE PROTON TRANSFER AND RELAXATION IN THE METHANOL SOLUTION OF 7-HYDROXYFLAVONE M. ITOH, M. ITOHSearch for more papers by this authorT. ADACHI, T. ADACHISearch for more papers by this author M. ITOH, M. ITOHSearch for more papers by this authorT. ADACHI, T. ADACHISearch for more papers by this author First published: November 13, 1984 https://doi.org/10.1002/chin.198446047AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat No abstract is available for this article. Volume15, Issue46November 13, 1984 RelatedInformation

A transient absorption and two-step laser excitation fluorescence study of the double proton transfer of 7-azaindole H-bonded dimers in 3-methylpentane

For the 7-azaindole dirner (N D) in 3-methylpentane, the metastable ground-state dimeric tautomer generated through an excited- state double proton transfer and its subsequent relaxation was detected by transient absorption and two-step laser excitation fluorescence spectroscopies. The second laser excitation of the ground-state dimeric tautomer produces different fluorescence character from that of the one-step laser excitation of N D, suggesting the formation of a monomeric tautomer.

Transient absorption and two-step laser excitation fluorescence studies of the excited-state proton transfer and relaxation in the methanol solution of 7-hydroxyflavone

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTransient absorption and two-step laser excitation fluorescence studies of the excited-state proton transfer and relaxation in the methanol solution of 7-hydroxyflavoneMichiya Itoh and Tomoko AdachiCite this: J. Am. Chem. Soc. 1984, 106, 16, 4320–4324Publication Date (Print):August 1, 1984Publication History Published online1 May 2002Published inissue 1 August 1984https://doi.org/10.1021/ja00328a003RIGHTS & PERMISSIONSArticle Views157Altmetric-Citations29LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (592 KB) Get e-Alerts Get e-Alerts

Time-resolved fluorescence and absorption spectra and two-step laser excitation fluorescence of the excited-state proton transfer in the methanol solution of 7-hydroxyquinoline

Time-resolved fluorescence and absorption spectra and two-step laser excitation fluorescence of the excited-state proton transfer in the methanol solution of 7-hydroxyquinoline

Two-step laser excitation fluorescence study of the ground- and excited-state proton transfer in 3-hydroxyflavone and 3-hydroxychromone

Etude de l'excitation en 2 etapes par faisceau laser, de la fluorescence de solution benzenique d'hydroxy-3 flavone et hydroxy-3 chromone. La 1ere excitation induit la formation d'un tautomere T instable, obtenu par transfert de proton a l'etat excite, la 2eme excitation provoque la fluorescence du tautomere T* a l'etat excite

Transient absorption and two-step laser excitation fluorescence spectra of the excited-state and ground-state proton transfer in 7-hydroxyquinoline

Transient absorption and two-step laser excitation fluorescence spectra of the excited-state and ground-state proton transfer in 7-hydroxyquinoline