{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,10]],"date-time":"2026-07-10T13:25:29Z","timestamp":1783689929828,"version":"3.55.0"},"reference-count":62,"publisher":"AIP Publishing","issue":"2","funder":[{"DOI":"10.13039\/501100001843","name":"Anusandhan National Research Foundation","doi-asserted-by":"crossref","award":["ANRF\/ARG\/2025\/004928\/CS"],"award-info":[{"award-number":["ANRF\/ARG\/2025\/004928\/CS"]}],"id":[{"id":"10.13039\/501100001843","id-type":"DOI","asserted-by":"crossref"}]}],"content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2026,7,14]]},"abstract":"<jats:p>The development of heavy-atom-free triplet materials has emerged as a major research focus due to their potential for diverse photochemical and photophysical applications. Nitroaromatic compounds represent an important class of such systems, exhibiting ultrafast intersystem crossing (ISC), high triplet yields, and rich triplet-mediated photochemistry. Here, we present a comprehensive investigation of the excited-state dynamics of 3-nitrobenzanthrone (NBT), a polycyclic nitroaromatic chromophore of atmospheric and photochemical relevance. Steady-state and time-resolved emission studies reveal that NBT possesses many closely spaced singlet excited states. The fluorescence predominantly originates from the weakly absorbing S1 state, which was confirmed through enhanced fluorescence yield upon direct excitation of the state. In contrast, triplet formation occurs efficiently from the strongly absorbing S2 state. Singlet-oxygen phosphorescence measurements confirm that the triplet yield also depends on the solvent polarity. Femtosecond transient absorption measurements indicated a sequential S2 (LE) \u2192 S2 (R*) \u2192 Tn pathway with an ISC time constant of \u223c10\u201317\u00a0ps depending upon the solvent polarity. Time-dependent density functional theory and spin\u2013orbit coupling calculations support these findings, identifying S2 (1\u03c0\u03c0*) \u2192 T2 (3n\u03c0*) as the dominant ISC channel. Collectively, the results establish a dual-state photophysical model, in which the solvent polarity and electronic state character govern fluorescence and triplet efficiency in NBT.<\/jats:p>","DOI":"10.1063\/5.0327644","type":"journal-article","created":{"date-parts":[[2026,7,10]],"date-time":"2026-07-10T13:00:57Z","timestamp":1783688457000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":0,"title":["Excitation-regulated fluorescence and triplet yield in 3-nitrobenzanthrone: Experimental and theoretical insights into excited-state dynamics"],"prefix":"10.1063","volume":"165","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6199-2347","authenticated-orcid":false,"given":"Suman","family":"Bhowmik","sequence":"first","affiliation":[{"name":"Department of Chemistry, Indian Institute of Technology Kanpur 1 , Kanpur 208 016, UP,","place":["India"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0003-2026-7802","authenticated-orcid":false,"given":"Dipankar","family":"Mondal","sequence":"additional","affiliation":[{"name":"Department of Chemistry, Indian Institute of Technology Kanpur 1 , Kanpur 208 016, UP,","place":["India"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kiran","family":"Arora","sequence":"additional","affiliation":[{"name":"Institute of Nano Science and Technology 2 , Knowledge City, Sector 81, Mohali 140306, Punjab,","place":["India"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0002-1409-9593","authenticated-orcid":false,"given":"Abhijit","family":"Dutta","sequence":"additional","affiliation":[{"name":"Department of Chemistry, Indian Institute of Technology Kanpur 1 , Kanpur 208 016, UP,","place":["India"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4150-7994","authenticated-orcid":false,"given":"Prakash P.","family":"Neelakandan","sequence":"additional","affiliation":[{"name":"Institute of Nano Science and Technology 2 , Knowledge City, Sector 81, Mohali 140306, Punjab,","place":["India"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8202-1854","authenticated-orcid":false,"given":"Pratik","family":"Sen","sequence":"additional","affiliation":[{"name":"Department of Chemistry, Indian Institute of Technology Kanpur 1 , Kanpur 208 016, UP,","place":["India"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"317","published-online":{"date-parts":[[2026,7,10]]},"reference":[{"issue":"15","key":"2026071009005259000_c1","doi-asserted-by":"publisher","first-page":"10679","DOI":"10.1021\/jacs.4c00511","article-title":"Optical and EPR detection of a triplet ground state phenyl nitrenium ion","volume":"146","year":"2024","journal-title":"J.\u00a0Am. Chem. Soc."},{"issue":"1","key":"2026071009005259000_c2","doi-asserted-by":"publisher","first-page":"3458","DOI":"10.1038\/s41467-022-31091-z","article-title":"Generation and direct observation of a triplet arylnitrenium ion","volume":"13","year":"2022","journal-title":"Nat. Commun."},{"key":"2026071009005259000_c3","doi-asserted-by":"publisher","first-page":"115593","DOI":"10.1016\/j.jphotochem.2024.115593","article-title":"Controlled photoinduced electron transfer via triplet in polymer matrix using electrostatic interactions","volume":"452","year":"2024","journal-title":"J.\u00a0Photochem. Photobiol., A"},{"issue":"29","key":"2026071009005259000_c4","doi-asserted-by":"publisher","first-page":"e202302714","DOI":"10.1002\/anie.202302714","article-title":"A kinetically stabilized nitrogen-doped triangulene cation: Stable and NIR fluorescent diradical cation with triplet ground state","volume":"62","year":"2023","journal-title":"Angew. Chem., Int. Ed."},{"issue":"6","key":"2026071009005259000_c5","doi-asserted-by":"publisher","first-page":"1549","DOI":"10.1021\/acs.jpclett.4c03267","article-title":"Controlling triplet-harvesting pathways and nonlinear optical properties in Cu(I) iodide-based polymers through ligand engineering","volume":"16","year":"2025","journal-title":"J.\u00a0Phys. Chem. Lett."},{"issue":"11","key":"2026071009005259000_c6","doi-asserted-by":"publisher","first-page":"8794","DOI":"10.1021\/acscatal.4c01185","article-title":"Synergistic excited state photocatalysis: Divergent energy transfer vs Lewis acid mediated photo transformations","volume":"14","year":"2024","journal-title":"ACS Catal."},{"key":"2026071009005259000_c7","doi-asserted-by":"publisher","first-page":"100207","DOI":"10.1016\/j.jpap.2023.100207","article-title":"Deciphering mechanism of excited state reactivity by spectroscopic methods","volume":"18","year":"2023","journal-title":"J.\u00a0Photochem. Photobiol."},{"key":"2026071009005259000_c8","doi-asserted-by":"publisher","first-page":"115510","DOI":"10.1016\/j.jphotochem.2024.115510","article-title":"Room temperature phosphorescence of 2-thioxo-coumarins in aqueous solution promoted by octa acid inclusion","volume":"451","year":"2024","journal-title":"J.\u00a0Photochem. Photobiol., A"},{"issue":"22","key":"2026071009005259000_c9","doi-asserted-by":"publisher","first-page":"5896","DOI":"10.1021\/acs.jpclett.4c01201","article-title":"Symmetry-breaking charge separation mediated triplet population in a perylenediimide trimer at the single-molecule level","volume":"15","year":"2024","journal-title":"J.\u00a0Phys. Chem. Lett."},{"issue":"28","key":"2026071009005259000_c10","doi-asserted-by":"publisher","first-page":"19120","DOI":"10.1039\/C8CP01023D","article-title":"Extending the scope of the carbonyl facilitated triplet excited state towards visible light excitation","volume":"20","year":"2018","journal-title":"Phys. Chem. Chem. Phys."},{"key":"2026071009005259000_c11","doi-asserted-by":"publisher","first-page":"683","DOI":"10.1038\/s41561-023-01237-9","article-title":"Shortwave absorption by wildfire smoke dominated by dark brown carbon","volume":"16","year":"2023","journal-title":"Nat. Geosci."},{"key":"2026071009005259000_c12","doi-asserted-by":"publisher","first-page":"6316","DOI":"10.1021\/es400683v","article-title":"Contribution of nitrated phenols to wood burning brown carbon light absorption in Detling, United Kingdom during winter time","volume":"47","year":"2013","journal-title":"Environ. Sci. Technol."},{"key":"2026071009005259000_c13","doi-asserted-by":"publisher","first-page":"10407","DOI":"10.1021\/jacs.3c13826","article-title":"Unraveling the ultrafast photochemical dynamics of nitrobenzene in aqueous solution","volume":"146","year":"2024","journal-title":"J.\u00a0Am. Chem. Soc."},{"key":"2026071009005259000_c14","doi-asserted-by":"publisher","first-page":"1067","DOI":"10.1021\/acsearthspacechem.2c00007","article-title":"Formation and evolution of catechol-derived SOA mass, composition, volatility, and light absorption","volume":"6","year":"2022","journal-title":"ACS Earth Space Chem."},{"key":"2026071009005259000_c15","doi-asserted-by":"publisher","first-page":"1233","DOI":"10.1016\/s0140-6736(02)11274-8","article-title":"Air pollution and health","volume":"360","year":"2002","journal-title":"Lancet"},{"key":"2026071009005259000_c16","doi-asserted-by":"publisher","first-page":"1981","DOI":"10.1021\/acs.est.7b05864","article-title":"Identification and quantification of 4-nitrocatechol formed from OH and NO3 radical-initiated reactions of catechol in air in the presence of NOx: Implications for secondary organic aerosol formation from biomass burning","volume":"52","year":"2018","journal-title":"Environ. Sci. Technol."},{"key":"2026071009005259000_c17","doi-asserted-by":"publisher","first-page":"1","DOI":"10.1038\/s41598-018-37186-2","article-title":"Occurrence of the potent mutagens 2-nitrobenzanthrone and 3-nitrobenzanthrone in fine airborne particles","volume":"9","year":"2019","journal-title":"Sci. Rep."},{"key":"2026071009005259000_c18","doi-asserted-by":"publisher","first-page":"3591","DOI":"10.1016\/s1352-2310(02)00255-8","article-title":"Occurrence and photostability of 3-nitrobenzanthrone associated with atmospheric particles","volume":"36","year":"2002","journal-title":"Atmos. Environ."},{"key":"2026071009005259000_c19","doi-asserted-by":"publisher","first-page":"17","DOI":"10.1093\/mutage\/gen049","article-title":"The carcinogenic air pollutant 3-nitrobenzanthrone induces GC to TA transversion mutations in human P53 sequences","volume":"24","year":"2008","journal-title":"Mutagenesis"},{"key":"2026071009005259000_c20","doi-asserted-by":"publisher","first-page":"399","DOI":"10.1093\/mutage\/gei057","article-title":"3-nitrobenzanthrone, a potential human cancer hazard in diesel exhaust and urban air pollution: A review of the evidence","volume":"20","year":"2005","journal-title":"Mutagenesis"},{"key":"2026071009005259000_c21","doi-asserted-by":"publisher","first-page":"7389","DOI":"10.1002\/jgrd.50561","article-title":"Speciation of \u2018brown\u2019 carbon in cloud water impacted by agricultural biomass burning in eastern China","volume":"118","year":"2013","journal-title":"J.\u00a0Geophys. Res.: Atmos."},{"key":"2026071009005259000_c22","doi-asserted-by":"publisher","first-page":"561","DOI":"10.1016\/j.atmosenv.2013.09.041","article-title":"One-year study of nitro-organic compounds and their relation to wood burning in PM10 aerosol from a rural site in Belgium","volume":"81","year":"2013","journal-title":"Atmos. Environ."},{"key":"2026071009005259000_c23","doi-asserted-by":"publisher","first-page":"5441","DOI":"10.1002\/2016jd026230","article-title":"Broadband optical properties of biomass\u2013burning aerosol and identification of brown carbon chromophores","volume":"122","year":"2017","journal-title":"J.\u00a0Geophys. Res.: Atmos."},{"key":"2026071009005259000_c24","doi-asserted-by":"publisher","first-page":"5655","DOI":"10.1021\/acs.jpcb.3c01143","article-title":"Solvent effects on the singlet\u2013triplet couplings in nitroaromatic compounds. Applications","volume":"127","year":"2023","journal-title":"J.\u00a0Phys. Chem. B"},{"key":"2026071009005259000_c25","doi-asserted-by":"publisher","first-page":"3401","DOI":"10.1016\/j.chempr.2023.09.008","article-title":"Nitroarenes: The rediscovery of their photochemistry opens new avenues in organic synthesis","volume":"9","year":"2023","journal-title":"Chem."},{"key":"2026071009005259000_c26","doi-asserted-by":"publisher","first-page":"12218","DOI":"10.1039\/d1cc04999b","article-title":"Excited state dynamics and photochemistry of nitroaromatic compounds","volume":"57","year":"2021","journal-title":"Chem. Commun."},{"key":"2026071009005259000_c27","doi-asserted-by":"publisher","first-page":"044008","DOI":"10.1063\/1.4977735","article-title":"Distortion dependent intersystem crossing: A femtosecond time-resolved photoelectron spectroscopy study of benzene, toluene, and p-xylene","volume":"4","year":"2017","journal-title":"Struct. Dyn."},{"key":"2026071009005259000_c28","doi-asserted-by":"publisher","first-page":"5379","DOI":"10.1002\/chem.201705854","article-title":"Mechanism of ultrafast intersystem crossing in 2-nitronaphthalene","volume":"24","year":"2018","journal-title":"Chem.-Eur. J."},{"key":"2026071009005259000_c29","doi-asserted-by":"publisher","first-page":"358","DOI":"10.1021\/jp074809a","article-title":"Ultrafast intersystem crossing in 1-nitronaphthalene. An experimental and computational study","volume":"112","year":"2008","journal-title":"J.\u00a0Phys. Chem. A"},{"key":"2026071009005259000_c30","doi-asserted-by":"publisher","first-page":"5872","DOI":"10.1021\/acs.jpca.3c02899","article-title":"Role of ultrafast internal conversion and intersystem crossing in the nonadiabatic relaxation dynamics of ortho-nitrobenzaldehyde","volume":"127","year":"2023","journal-title":"J.\u00a0Phys. Chem. A"},{"key":"2026071009005259000_c31","doi-asserted-by":"publisher","first-page":"19364","DOI":"10.1038\/srep19364","article-title":"A combination of chemometrics and quantum mechanics methods applied to analysis of femtosecond transient absorption spectrum of ortho-nitroaniline","volume":"6","year":"2016","journal-title":"Sci. Rep."},{"key":"2026071009005259000_c32","doi-asserted-by":"publisher","first-page":"833","DOI":"10.1002\/cptc.201900108","article-title":"Nonadiabatic dynamics simulation predict intersystem crossing in nitroaromatic molecules on a picosecond time scale","volume":"3","year":"2019","journal-title":"ChemPhotoChem"},{"key":"2026071009005259000_c33","doi-asserted-by":"publisher","first-page":"4262","DOI":"10.1021\/acs.jpca.9b02312","article-title":"Nonstatistical dissociation dynamics of nitroaromatic chromophores","volume":"123","year":"2019","journal-title":"J.\u00a0Phys. Chem. A"},{"key":"2026071009005259000_c34","doi-asserted-by":"publisher","first-page":"747","DOI":"10.1021\/acs.estlett.1c00614","article-title":"Photolysis of nitroaromatic compounds under sunlight: A possible daytime photochemical source of nitrous acid","volume":"8","year":"2021","journal-title":"Environ. Sci. Technol. Lett."},{"key":"2026071009005259000_c35","doi-asserted-by":"publisher","first-page":"899","DOI":"10.1016\/0043-1354(86)90179-x","article-title":"Influence of humic substances on photolysis of nitroaromatic compounds in aqueous systems","volume":"20","year":"1986","journal-title":"Water Res."},{"key":"2026071009005259000_c36","doi-asserted-by":"publisher","first-page":"577","DOI":"10.1021\/jp109041y","article-title":"Primary photochemistry of nitrated aromatic compounds: Excited-state dynamics and NO\u00b7 dissociation from 9-nitroanthracene","volume":"115","year":"2011","journal-title":"J.\u00a0Phys. Chem. A"},{"key":"2026071009005259000_c37","doi-asserted-by":"publisher","first-page":"190","DOI":"10.1038\/s42004-020-00434-6","article-title":"Deciphering the unusual fluorescence in weakly coupled bis-nitro-pyrrolo[3,2-b] pyrroles","volume":"3","year":"2020","journal-title":"Commun. Chem."},{"key":"2026071009005259000_c38","doi-asserted-by":"publisher","first-page":"2772","DOI":"10.1021\/es961067i","article-title":"3-nitrobenzanthrone, a powerful bacterial mutagen and suspected human carcinogen found in diesel exhaust and airborne particulates","volume":"31","year":"1997","journal-title":"Environ. Sci. Technol."},{"key":"2026071009005259000_c39","doi-asserted-by":"publisher","first-page":"42","DOI":"10.1039\/b210174b","article-title":"Determination of mutagenic 3-nitrobenzanthrone in diesel exhaust particulate matter by three-dimensional high-performance liquid chromatography","volume":"128","year":"2003","journal-title":"Analyst"},{"key":"2026071009005259000_c40","doi-asserted-by":"publisher","first-page":"433","DOI":"10.1080\/10406630290103645","article-title":"Absorption and fluorescence spectra of nitrobenzanthrones","volume":"22","year":"2002","journal-title":"Polycyclic Aromat. Compd."},{"key":"2026071009005259000_c41","doi-asserted-by":"publisher","first-page":"402","DOI":"10.1016\/j.saa.2015.08.053","article-title":"Vibrational and electronic spectra of 2-nitrobenzanthrone: An experimental and computational study","volume":"153","year":"2016","journal-title":"Spectrochim. Acta, Part A"},{"key":"2026071009005259000_c42","doi-asserted-by":"publisher","first-page":"10762","DOI":"10.1021\/jp205946c","article-title":"Origin of ultrafast excited state dynamics of 1-nitropyrene","volume":"115","year":"2011","journal-title":"J.\u00a0Phys. Chem. A"},{"key":"2026071009005259000_c43","doi-asserted-by":"publisher","first-page":"552","DOI":"10.1021\/jp065364d","article-title":"Singlet excited-state dynamics of nitropolycyclic aromatic hydrocarbons: Direct measurements by femtosecond fluorescence up-conversion","volume":"111","year":"2007","journal-title":"J.\u00a0Phys. Chem. A"},{"key":"2026071009005259000_c44","doi-asserted-by":"publisher","first-page":"224518","DOI":"10.1063\/1.3272536","article-title":"On the origin of ultrafast nonradiative transitions in nitro-polycyclic aromatic hydrocarbons: Excited-state dynamics in 1-nitronaphthalene","volume":"131","year":"2009","journal-title":"J.\u00a0Chem. Phys."},{"key":"2026071009005259000_c45","doi-asserted-by":"publisher","first-page":"805","DOI":"10.1021\/jp8087397","article-title":"Relaxation in the triplet manifold of 1-nitronaphthalene observed by transient absorption spectroscopy","volume":"113","year":"2009","journal-title":"J.\u00a0Phys. Chem. A"},{"key":"2026071009005259000_c46","doi-asserted-by":"publisher","first-page":"6580","DOI":"10.1021\/jp405656n","article-title":"Excited-state dynamics in nitro-naphthalene derivatives: Intersystem crossing to the triplet manifold in hundreds of femtoseconds","volume":"117","year":"2013","journal-title":"J.\u00a0Phys. Chem. A"},{"issue":"12","key":"2026071009005259000_c47","doi-asserted-by":"publisher","first-page":"1460","DOI":"10.1021\/tx980104b","article-title":"An unusual DNA adduct derived from the powerfully mutagenic environmental contaminant 3-nitrobenzanthrone","volume":"11","year":"1998","journal-title":"Chem. Res. Toxicol."},{"issue":"1","key":"2026071009005259000_c48","doi-asserted-by":"publisher","first-page":"162","DOI":"10.1021\/acs.jpcb.4c07039","article-title":"Critical role of water beyond the media to maintain protein stability and activity in hydrated deep eutectic solvent","volume":"129","year":"2025","journal-title":"J.\u00a0Phys. Chem. B"},{"key":"2026071009005259000_c49","doi-asserted-by":"publisher","first-page":"134538","DOI":"10.1016\/j.molstruc.2022.134538","article-title":"Ultrafast excited state relaxation of a model green fluorescent protein chromophore: Femtosecond fluorescence and transient absorption stud","volume":"1275","year":"2023","journal-title":"J.\u00a0Mol. Struct."},{"issue":"20","key":"2026071009005259000_c50","doi-asserted-by":"publisher","first-page":"4414","DOI":"10.1021\/acs.jpca.5c00901","article-title":"Effect of hydrogen bonding on ultrafast intersystem crossing in 7-diethylaminothiocoumarin","volume":"129","year":"2025","journal-title":"J.\u00a0Phys. Chem. A"},{"key":"2026071009005259000_c51","doi-asserted-by":"publisher","first-page":"116361","DOI":"10.1016\/j.jphotochem.2025.116361","article-title":"Effect of halogenation on the photophysics of salicylideneimine\u2013boron compound: An unusual behaviour with bromination","volume":"466","year":"2025","journal-title":"J.\u00a0Photochem. Photobiol., A"},{"issue":"22","key":"2026071009005259000_c52","doi-asserted-by":"publisher","first-page":"224108","DOI":"10.1063\/5.0004608","article-title":"The ORCA quantum chemistry program package","volume":"152","year":"2020","journal-title":"J.\u00a0Chem. Phys."},{"key":"2026071009005259000_c53","volume-title":"Modern Molecular Photochemistry of Organic Molecules","year":"2010"},{"key":"2026071009005259000_c54","doi-asserted-by":"publisher","first-page":"617","DOI":"10.1146\/annurev-physchem-061020-053433","article-title":"Understanding and controlling intersystem crossing in molecules","volume":"72","year":"2021","journal-title":"Annu. Rev. Phys. Chem."},{"key":"2026071009005259000_c55","doi-asserted-by":"publisher","first-page":"187","DOI":"10.1002\/wcms.83","article-title":"Spin-orbit coupling and intersystem crossing in molecules","volume":"2","year":"2012","journal-title":"WIREs Comput. Mol. Sci."},{"key":"2026071009005259000_c56","doi-asserted-by":"publisher","first-page":"2777","DOI":"10.1021\/acs.jctc.6b01149","article-title":"Insights into the complex photophysics and photochemistry of the simplest nitroaromatic compound: A CASPT2\/\/CASSCF study on nitrobenzene","volume":"13","year":"2017","journal-title":"J.\u00a0Chem. Theory Comput."},{"key":"2026071009005259000_c57","doi-asserted-by":"publisher","first-page":"3296845","DOI":"10.1155\/2017\/3296845","article-title":"Torsional potential energy surfaces of dinitrobenzene isomers","volume":"2017","journal-title":"Adv. Condens. Matter Phys."},{"key":"2026071009005259000_c58","doi-asserted-by":"publisher","first-page":"109051","DOI":"10.1016\/j.dyepig.2020.109051","article-title":"A study on photophysical and photodynamic properties of donor\u2013acceptor BODIPY complexes: Correlation between singlet oxygen quantum yield and singlet-triplet energy gap","volume":"187","year":"2021","journal-title":"Dyes Pigm."},{"key":"2026071009005259000_c59","doi-asserted-by":"publisher","first-page":"113","DOI":"10.1063\/1.555934","article-title":"Quantum yields for the photosensitized formation of the lowest electronically excited singlet state of molecular oxygen in solution","volume":"22","year":"1993","journal-title":"J.\u00a0Phys. Chem. Ref. Data"},{"key":"2026071009005259000_c60","doi-asserted-by":"publisher","first-page":"113583","DOI":"10.1016\/j.jphotochem.2021.113583","article-title":"Comparative study of the multistate ESIPT in dihydroxyanthraquinones","volume":"423","year":"2022","journal-title":"J.\u00a0Photochem. Photobiol., A"},{"issue":"33","key":"2026071009005259000_c61","doi-asserted-by":"publisher","first-page":"6853","DOI":"10.1021\/acs.jpca.4c03139","article-title":"Ultrafast processes in upper excited singlet states of free and caged 7-diethylaminothiocoumarin","volume":"128","year":"2024","journal-title":"J.\u00a0Phys. Chem. A"},{"issue":"33","key":"2026071009005259000_c62","doi-asserted-by":"publisher","first-page":"6864","DOI":"10.1021\/acs.jpca.4c03224","article-title":"Ultrafast intersystem crossing in benzanthrone: Effect of hydrogen bonding and viscosity","volume":"128","year":"2024","journal-title":"J.\u00a0Phys. Chem. A"}],"container-title":["The Journal of Chemical Physics"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/pubs.aip.org\/aip\/jcp\/article-pdf\/doi\/10.1063\/5.0327644\/21071419\/024307_1_5.0327644.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"syndication"},{"URL":"https:\/\/pubs.aip.org\/aip\/jcp\/article-pdf\/doi\/10.1063\/5.0327644\/21071419\/024307_1_5.0327644.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,7,10]],"date-time":"2026-07-10T13:00:58Z","timestamp":1783688458000},"score":1,"resource":{"primary":{"URL":"https:\/\/pubs.aip.org\/jcp\/article\/165\/2\/024307\/3398138\/Excitation-regulated-fluorescence-and-triplet"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,7,10]]},"references-count":62,"journal-issue":{"issue":"2","published-print":{"date-parts":[[2026,7,14]]}},"URL":"https:\/\/doi.org\/10.1063\/5.0327644","relation":{},"ISSN":["0021-9606","1089-7690"],"issn-type":[{"value":"0021-9606","type":"print"},{"value":"1089-7690","type":"electronic"}],"subject":[],"published-other":{"date-parts":[[2026,7,14]]},"published":{"date-parts":[[2026,7,10]]},"article-number":"024307"}}