{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,23]],"date-time":"2026-09-23T16:07:07Z","timestamp":1790179627348,"version":"4.1.0"},"reference-count":59,"publisher":"American Chemical Society (ACS)","issue":"5","license":[{"start":{"date-parts":[[2026,6,3]],"date-time":"2026-06-03T00:00:00Z","timestamp":1780444800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001412","name":"Council of Scientific and Industrial Research, India","doi-asserted-by":"publisher","award":["01(3034)\/21\/EMR-II"],"award-info":[{"award-number":["01(3034)\/21\/EMR-II"]}],"id":[{"id":"10.13039\/501100001412","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001501","name":"University Grants Commission","doi-asserted-by":"publisher","award":["221610008215"],"award-info":[{"award-number":["221610008215"]}],"id":[{"id":"10.13039\/501100001501","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001403","name":"Indian Institute of Technology Kanpur","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100001403","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001843","name":"Science and Engineering Research Board","doi-asserted-by":"publisher","award":["CRG\/2022\/007849"],"award-info":[{"award-number":["CRG\/2022\/007849"]}],"id":[{"id":"10.13039\/501100001843","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100004541","name":"Ministry of Education, India","doi-asserted-by":"publisher","award":["1301129"],"award-info":[{"award-number":["1301129"]}],"id":[{"id":"10.13039\/501100004541","id-type":"DOI","asserted-by":"publisher"}]},{"name":"J. C. Bose Grant","award":["ANRF\/JBG\/2025\/000067\/CS"],"award-info":[{"award-number":["ANRF\/JBG\/2025\/000067\/CS"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2026,9,23]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>Understanding the role of conformational flexibility in multichromophoric systems is crucial for elucidating excited-state processes such as electronic coupling, energy transfer, and exciton\u2013exciton annihilation, which are central to the rational design of artificial light-harvesting assemblies. In the present work, the excited-state dynamics of a highly flexible free-base porphyrin dimer has been investigated and compared with its monomer using femtosecond transient absorption spectroscopy and femtosecond optical gating. While the excited-state kinetics of the dimer closely resemble those of the monomer at low pump fluence, pump-fluence-dependent transient absorption and femtosecond optical gating measurements reveal additional ultrafast components of 1 ps and 18\u201328 ps. Potential energy surface scan reveals a strong dependence of electronic coupling on the dihedral angle between the two porphyrin units. Comparison of the estimated electronic coupling with the reorganization energy indicates that the dimer lies in the weak-coupling regime. Correlation of femtosecond optical gating measurements with transition dipole moments calculated at different dihedral angles suggests that conformers with more favorable transition-dipole orientations predominantly contribute to the blue side of the emission spectrum. These components are attributed to Fo\u0308rster-mediated singlet\u2013singlet annihilation, arising from the significant spectral overlap between the S0 \u2190 S1 emission and the Sn \u2190 S1 excited-state absorption. Overall, these results demonstrate that conformational flexibility modulates Fo\u0308rster-mediated annihilation dynamics in a porphyrin dimer.<\/jats:p>","DOI":"10.1021\/acsphyschemau.6c00042","type":"journal-article","created":{"date-parts":[[2026,6,3]],"date-time":"2026-06-03T14:48:31Z","timestamp":1780498111000},"page":"1083-1093","source":"Crossref","is-referenced-by-count":0,"title":["Implications\nof Intramolecular Interactions on the\nFluorescence of a Highly Flexible Ethane-Bridged Porphyrin Dimer"],"prefix":"10.1021","volume":"6","author":[{"ORCID":"https:\/\/orcid.org\/0009-0004-9091-3889","authenticated-orcid":true,"given":"Sucheta","family":"Kundu","sequence":"first","affiliation":[{"name":"Indian Institute of Technology Bombay , , ,","place":["Mumbai, India, 400 076"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Arya","family":"Roychowdhury","sequence":"additional","affiliation":[{"name":"Indian Institute of Technology Kanpur , , ,","place":["Kanpur, India, 208 016"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7582-9724","authenticated-orcid":true,"given":"Arkaprava","family":"Chowdhury","sequence":"additional","affiliation":[{"name":"Indian Institute of Technology Bombay , , ,","place":["Mumbai, India, 400 076"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6686-582X","authenticated-orcid":true,"given":"Achintya Kumar","family":"Dutta","sequence":"additional","affiliation":[{"name":"Indian Institute of Technology Bombay , , ,","place":["Mumbai, India, 400 076"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4129-5074","authenticated-orcid":true,"given":"Sankar Prasad","family":"Rath","sequence":"additional","affiliation":[{"name":"Indian Institute of Technology Kanpur , , ,","place":["Kanpur, India, 208 016"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7966-2944","authenticated-orcid":true,"given":"Anindya","family":"Datta","sequence":"additional","affiliation":[{"name":"Indian Institute of Technology Bombay , , ,","place":["Mumbai, India, 400 076"]},{"name":"Institute of Nano Science and Engineering , Sector 81 , ,","place":["SAS Nagar, India, 140 306"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"316","published-online":{"date-parts":[[2026,6,3]]},"reference":[{"key":"2026092310072879900_cit1","doi-asserted-by":"publisher","first-page":"3443","DOI":"10.1021\/acs.jpclett.0c00856","article-title":"Ultrafast\nDynamics of Nonrigid Zinc-Porphyrin Arrays Mimicking the Photosynthetic\n\u201cSpecial Pair\u201d","volume":"11","author":"Moretti","year":"2020","journal-title":"J. Phys. Chem.\nLett."},{"key":"2026092310072879900_cit2","doi-asserted-by":"publisher","first-page":"3502","DOI":"10.1021\/jf0211736","article-title":"Fluorescence of\nDietary Porphyrins as a Basis for Real-Time\nDetection of Fecal Contamination on Meat","volume":"51","author":"Ashby","year":"2003","journal-title":"J.\nAgric. Food Chem."},{"key":"2026092310072879900_cit3","doi-asserted-by":"publisher","first-page":"691","DOI":"10.1039\/D4TC03281K","article-title":"Influence\nof a Diketopyrrolopyrrole Spacer on the Ultrafast Nonlinear Optical\nProperties and Excited State Dynamics of Dimeric Zinc Porphyrin Molecules","volume":"13","author":"Murali","year":"2025","journal-title":"J. Mater. Chem. C"},{"key":"2026092310072879900_cit4","doi-asserted-by":"publisher","first-page":"978","DOI":"10.1021\/jacs.4c14161","article-title":"Radical\nAnions of Porphyrin Molecular Wires: Delocalization and Dynamics","volume":"147","author":"Hergenhahn","year":"2025","journal-title":"J. Am. Chem. Soc."},{"key":"2026092310072879900_cit5","doi-asserted-by":"publisher","first-page":"18857","DOI":"10.1021\/acs.jpcc.4c05066","article-title":"Synthesis\nand Understanding of the Role of Donor-Tetracyanobutadiene in Porphyrin\n\u03b2-Periphery toward Ultrafast Charge Transfer Dynamics","volume":"128","author":"Dawson","year":"2024","journal-title":"J. Phys. Chem. C"},{"key":"2026092310072879900_cit6","doi-asserted-by":"publisher","DOI":"10.1002\/anie.7602426","article-title":"Pictet-Spengler Synthesis\nof Fused-Azepine- and 1H-Azocine-Bridged Ni II Porphyrin Dimers","volume":"65","author":"Li","year":"2026","journal-title":"Angew. Chem., Int. Ed."},{"key":"2026092310072879900_cit7","doi-asserted-by":"publisher","first-page":"1771","DOI":"10.1021\/jz4005152","article-title":"Porphyrin-Based\nSupramolecular Nanoarchitectures for Solar Energy Conversion","volume":"4","author":"Hasobe","year":"2013","journal-title":"J. Phys. Chem. Lett."},{"key":"2026092310072879900_cit8","doi-asserted-by":"publisher","first-page":"9712","DOI":"10.1021\/acs.jpcc.0c00670","article-title":"Quantum Chemical\nSupport on the Two-Dimensional Assembly\nof Porphyrin Rings in the Application of Energy-Storage Devices","volume":"124","author":"Suresh","year":"2020","journal-title":"J. Phys. Chem. C"},{"key":"2026092310072879900_cit9","doi-asserted-by":"publisher","first-page":"28213","DOI":"10.1039\/D3CP03055E","article-title":"Mechanism of Optical\nLimiting in Metalloporphyrins under Visible Continuous Radiation","volume":"25","author":"Zhang","year":"2023","journal-title":"Phys. Chem. Chem. Phys."},{"key":"2026092310072879900_cit10","doi-asserted-by":"publisher","first-page":"2517","DOI":"10.1021\/acs.chemrev.6b00361","article-title":"Porphyrinoids for Chemical Sensor\nApplications","volume":"117","author":"Paolesse","year":"2017","journal-title":"Chem. Rev."},{"key":"2026092310072879900_cit11","doi-asserted-by":"publisher","DOI":"10.1002\/anie.202303501","article-title":"Photoinitiated Energy Transfer in\nPorous-Cage-Stabilised\nSilver Nanoparticles","volume":"62","author":"Wilms","year":"2023","journal-title":"Angew. Chem., Int. Ed."},{"key":"2026092310072879900_cit12","doi-asserted-by":"publisher","first-page":"340","DOI":"10.1039\/B915149B","article-title":"The Role\nof Porphyrin\nChemistry in Tumor Imaging and Photodynamic Therapy","volume":"40","author":"Ethirajan","year":"2011","journal-title":"Chem. Soc. Rev."},{"key":"2026092310072879900_cit13","doi-asserted-by":"publisher","first-page":"1922","DOI":"10.1021\/ar9001697","article-title":"Discrete Cyclic\nPorphyrin Arrays as Artificial Light-Harvesting\nAntenna","volume":"42","author":"Aratani","year":"2009","journal-title":"Acc. Chem. Res."},{"key":"2026092310072879900_cit14","doi-asserted-by":"publisher","first-page":"1602","DOI":"10.1038\/ncomms2603","article-title":"Quantum Coherence Controls the Charge Separation in\na Prototypical Artificial Light-Harvesting System","volume":"4","author":"Andrea Rozzi","year":"2013","journal-title":"Nat. Commun."},{"key":"2026092310072879900_cit15","doi-asserted-by":"publisher","first-page":"943","DOI":"10.1039\/C3CS60443H","article-title":"Conjugated Porphyrin\nArrays: Synthesis, Properties and Applications\nfor Functional Materials","volume":"44","author":"Tanaka","year":"2015","journal-title":"Chem. Soc. Rev."},{"key":"2026092310072879900_cit16","doi-asserted-by":"publisher","first-page":"9353","DOI":"10.1021\/acs.jpca.2c06040","article-title":"Balancing\nPanchromatic Absorption and Multistep Charge Separation in a Compact\nMolecular Architecture","volume":"126","author":"Roy","year":"2022","journal-title":"J. Phys. Chem. A"},{"key":"2026092310072879900_cit17","doi-asserted-by":"publisher","first-page":"10654","DOI":"10.1021\/jp053514z","article-title":"Energy\nTransfer\nwithin Zn-Porphyrin Dendrimers: Study of the Singlet-Singlet Annihilation\nKinetics","volume":"109","author":"Larsen","year":"2005","journal-title":"J. Phys. Chem. A"},{"key":"2026092310072879900_cit18","doi-asserted-by":"publisher","first-page":"4281","DOI":"10.1039\/b003612i","article-title":"Photoinduced Energy and Electron Transfer in Bis-Porphyrins\nwith Quinoxaline Troger\u2019s Base and Biquinoxalinyl Spacers","volume":"2","author":"Yeow","year":"2000","journal-title":"Phys. Chem. Chem. Phys."},{"key":"2026092310072879900_cit19","doi-asserted-by":"publisher","first-page":"4632","DOI":"10.1021\/ja00038a028","article-title":"Photophysics\nof Entwined Porphyrin Conjugates: Competitive Exciton Annihilation,\nEnergy-Transfer, Electron-Transfer, and Superexchange Processes","volume":"114","author":"Brim","year":"1992","journal-title":"J. Am. Chem. Soc."},{"key":"2026092310072879900_cit20","doi-asserted-by":"publisher","first-page":"6298","DOI":"10.1021\/jacs.1c12889","article-title":"Synthetic Control of Exciton Dynamics\nin Bioinspired Cofacial Porphyrin Dimers","volume":"144","author":"Roy","year":"2022","journal-title":"J.\nAm. Chem. Soc."},{"key":"2026092310072879900_cit21","doi-asserted-by":"publisher","first-page":"21476","DOI":"10.1021\/jacs.4c04186","article-title":"Charge\nand Spin\nTransfer Dynamics in a Weakly Coupled Porphyrin Dimer","volume":"146","author":"Kopp","year":"2024","journal-title":"J. Am. Chem. Soc."},{"key":"2026092310072879900_cit22","doi-asserted-by":"publisher","first-page":"11432","DOI":"10.1021\/jp010411h","article-title":"Spectroscopic\nProperties of a Self-Assembled Zinc Porphyrin Tetramer II. Time-Resolved\nFluorescence Spectroscopy","volume":"105","author":"Yatskou","year":"2001","journal-title":"J. Phys. Chem. A"},{"key":"2026092310072879900_cit23","doi-asserted-by":"publisher","first-page":"76","DOI":"10.1021\/ja0009976","article-title":"Photophysical Properties\nof Long Rodlike Meso\u2013Meso-Linked Zinc(II) Porphyrins Investigated\nby Time-Resolved Laser Spectroscopic Methods","volume":"123","author":"Kim","year":"2001","journal-title":"J. Am. Chem. Soc."},{"key":"2026092310072879900_cit24","doi-asserted-by":"publisher","first-page":"648","DOI":"10.1021\/jp107407p","article-title":"One-Dimensional\nExciton Diffusion in Perylene Bisimide Aggregates","volume":"115","author":"Marciniak","year":"2011","journal-title":"J. Phys. Chem. A"},{"key":"2026092310072879900_cit25","doi-asserted-by":"publisher","first-page":"13368","DOI":"10.1039\/C6CP01780K","article-title":"Identification of Effective Exciton-Exciton\nAnnihilation in Squaraine-Squaraine Copolymers","volume":"18","author":"Hader","year":"2016","journal-title":"Phys. Chem. Chem. Phys."},{"key":"2026092310072879900_cit26","doi-asserted-by":"publisher","first-page":"054103","DOI":"10.1063\/1.4863259","article-title":"Kinetic Theory\nof Exciton-Exciton Annihilation","volume":"140","author":"May","year":"2014","journal-title":"J. Chem. Phys."},{"key":"2026092310072879900_cit27","doi-asserted-by":"publisher","first-page":"18416","DOI":"10.1021\/acs.jpcc.0c04546","article-title":"Exciton-Exciton\nAnnihilation as a Probe of Exciton Diffusion in Large Porphyrin Nanorings","volume":"124","author":"Bressan","year":"2020","journal-title":"J. Phys. Chem. C"},{"key":"2026092310072879900_cit28","doi-asserted-by":"publisher","first-page":"16187","DOI":"10.1021\/ja046241e","article-title":"Porphyrin Boxes Constructed\nby Homochiral Self-Sorting Assembly: Optical Separation, Exciton Coupling,\nand Efficient Excitation Energy Migration","volume":"126","author":"Hwang","year":"2004","journal-title":"J.\nAm. Chem. Soc."},{"key":"2026092310072879900_cit29","doi-asserted-by":"publisher","first-page":"3961","DOI":"10.1021\/jp003643+","article-title":"Intramolecular\nEnergy Hopping in Polyphenylene Dendrimers with an Increasing Number\nof Peryleneimide Chromophores","volume":"105","author":"Maus","year":"2001","journal-title":"J. Phys. Chem.\nA"},{"key":"2026092310072879900_cit30","doi-asserted-by":"publisher","first-page":"236","DOI":"10.1021\/ja045254p","article-title":"Directly Meso-Meso\nLinked Porphyrin Rings: Synthesis,\nCharacterization, and Efficient Excitation Energy Hopping","volume":"127","author":"Nakamura","year":"2005","journal-title":"J. Am. Chem. Soc."},{"key":"2026092310072879900_cit31","doi-asserted-by":"publisher","first-page":"68","DOI":"10.1002\/0471264180.os070.09","article-title":"3,4-Diethylpyrrole and 2,3,7,8,12,13,17,18-Octaethylporphyrin","volume":"70","author":"Sessler","year":"2003","journal-title":"Org. Synth."},{"key":"2026092310072879900_cit32","doi-asserted-by":"publisher","first-page":"1643","DOI":"10.1039\/p19770001643","article-title":"Bis-Porphyrin\nDerivatives. Part 1.\nReaction of Meso-Hydroxymethylporphyrinatometal Derivatives with Acids","volume":"1","author":"Arnold","year":"1977","journal-title":"J. Chem. Soc., Perkin Trans."},{"key":"2026092310072879900_cit33","doi-asserted-by":"publisher","first-page":"100401","DOI":"10.1016\/j.jphotochemrev.2020.100401","article-title":"Comprehensive Review\nof Photophysical Parameters (\u03b5, \u03a6f, \u03a4s) of Tetraphenylporphyrin\n(H2TPP) and Zinc Tetraphenylporphyrin (ZnTPP)\u2500Critical Benchmark\nMolecules in Photochemistry and Photosynthesis","volume":"46","author":"Taniguchi","year":"2021","journal-title":"J. Photochem. Photobiol., C"},{"key":"2026092310072879900_cit34","doi-asserted-by":"publisher","first-page":"19494","DOI":"10.1039\/D1CP02540F","article-title":"From Fluorogens to\nFluorophores by Elucidation and Suppression of Ultrafast Excited State\nProcesses of a Schiff Base","volume":"23","author":"Dasgupta","year":"2021","journal-title":"Phys. Chem. Chem.\nPhys."},{"key":"2026092310072879900_cit35","doi-asserted-by":"publisher","first-page":"1","DOI":"10.18637\/jss.v049.i03","article-title":"Glotaran:\nA Java-Based Graphical User Interface for the R Package TIMP","volume":"49","author":"Snellenburg","year":"2012","journal-title":"J. Stat. Software"},{"key":"2026092310072879900_cit36","doi-asserted-by":"publisher","DOI":"10.1002\/wcms.1606","article-title":"Software Update:\nThe ORCA Program System\u2500Version 5.0","volume":"12","author":"Neese","year":"2022","journal-title":"Wiley Interdiscip. Rev. Comput. Mol. Sci."},{"key":"2026092310072879900_cit37","unstructured":"Knizia, G.\n          \n          Iboview. http:\/\/www.iboview.org (accessed Feb 25, 2026)."},{"key":"2026092310072879900_cit38","unstructured":"Zhurko, G. A.\n          \n          Chemcraft\u2500Graphical\nProgram for Visualization of Quantum Chemistry Computations. https:\/\/chemcraftprog.com (accessed Feb 03, 2026)."},{"key":"2026092310072879900_cit39","doi-asserted-by":"publisher","first-page":"733","DOI":"10.1039\/jr9570000733","article-title":"142. Chlorophyll and Related Compounds.\nPart VI. The Synthesis of Octaethylchlorin","author":"Eisner","year":"1957","journal-title":"J. Chem. Soc."},{"key":"2026092310072879900_cit40","doi-asserted-by":"publisher","first-page":"138","DOI":"10.1016\/0022-2852(61)90236-3","article-title":"Spectra of\nPorphyrins","volume":"6","author":"Gouterman","year":"1961","journal-title":"J. Mol. Spectrosc."},{"key":"2026092310072879900_cit41","doi-asserted-by":"publisher","first-page":"108","DOI":"10.1016\/0022-2852(63)90011-0","article-title":"Spectra of Porphyrins","volume":"11","author":"Gouterman","year":"1963","journal-title":"J. Mol. Spectrosc."},{"key":"2026092310072879900_cit42","doi-asserted-by":"publisher","first-page":"2522","DOI":"10.1021\/acs.jpca.2c01225","article-title":"Tailoring the\nIntersystem Crossing and Triplet Dynamics of Free-Base Octaalkyl-\u03b2-Oxo-Substituted\nPorphyrins: Competing Effects of Spin\u2013Vibronic and NH Tautomerism\nRelaxation Channels","volume":"126","author":"Bhattacharya","year":"2022","journal-title":"J. Phys. Chem. A"},{"key":"2026092310072879900_cit43","doi-asserted-by":"publisher","first-page":"13769","DOI":"10.1021\/jacs.1c05793","article-title":"Null Exciton-Coupled Chromophoric\nDimer Exhibits Symmetry-Breaking\nCharge Separation","volume":"143","author":"Sebastian","year":"2021","journal-title":"J. Am. Chem. Soc."},{"key":"2026092310072879900_cit44","doi-asserted-by":"publisher","first-page":"371","DOI":"10.1351\/pac196511030371","article-title":"The Exciton\nModel in Molecular Spectroscopy","volume":"11","author":"Kasha","year":"1965","journal-title":"Pure Appl.\nChem."},{"key":"2026092310072879900_cit45","doi-asserted-by":"publisher","first-page":"13857","DOI":"10.1021\/jp9607374","article-title":"Spectral and\nPhotophysical Properties\nof Ethylene-Bridged Side-to-Side Porphyrin Dimers. 1. Ground-State\nAbsorption and Fluorescence Study and Calculation of Electronic Structure\nof Trans-1,2-Bis(Meso-Octaethylporphyrinyl)Ethene","volume":"100","author":"Chachisvilis","year":"1996","journal-title":"J. Phys. Chem."},{"key":"2026092310072879900_cit46","doi-asserted-by":"publisher","first-page":"726","DOI":"10.1007\/bf02678852","article-title":"Analysis\nof the Conformation Composition of Ethane-Bisporphyrin Solutions from\nAbsorption Spectra in the Region of the Soret Band","volume":"64","author":"Terekhov","year":"1997","journal-title":"J. Appl. Spectrosc."},{"key":"2026092310072879900_cit47","doi-asserted-by":"publisher","first-page":"57","DOI":"10.1146\/annurev.physchem.54.011002.103746","article-title":"Long-Range\nResonance Energy Transfer in Molecular Systems","volume":"54","author":"Scholes","year":"2003","journal-title":"Annu. Rev. Phys. Chem."},{"key":"2026092310072879900_cit48","doi-asserted-by":"publisher","first-page":"27222","DOI":"10.1021\/acs.jpcc.9b07494","article-title":"Time-Resolved\nStructural Dynamics of Extended \u03c0-Electron Porphyrin Nanoring","volume":"123","author":"Bressan","year":"2019","journal-title":"J. Phys. Chem. C"},{"key":"2026092310072879900_cit49","doi-asserted-by":"publisher","first-page":"8038","DOI":"10.1039\/c2cp23608g","article-title":"Ultrafast Exciton Dynamics after Soret- or Q-Band Excitation\nof a Directly \u03b2,\u0392\u2032-Linked Bisporphyrin","volume":"14","author":"Kullmann","year":"2012","journal-title":"Phys. Chem. Chem. Phys."},{"key":"2026092310072879900_cit50","doi-asserted-by":"publisher","first-page":"8847","DOI":"10.1021\/jp993154d","article-title":"Exciton Annihilation\nin J-Aggregates Probed by Femtosecond Fluorescence Upconversion","volume":"104","author":"Moll","year":"2000","journal-title":"J. Phys. Chem. A"},{"key":"2026092310072879900_cit51","doi-asserted-by":"publisher","first-page":"1594","DOI":"10.1021\/acs.jpca.8b11473","article-title":"One- to\nTwo-Exciton\nTransitions in Perylene Bisimide Dimer Revealed by Two-Dimensional\nElectronic Spectroscopy","volume":"123","author":"Bressan","year":"2019","journal-title":"J. Phys. Chem. A"},{"key":"2026092310072879900_cit52","doi-asserted-by":"publisher","DOI":"10.1002\/cphc.202400104","article-title":"Controlling\nChirogenic Effects in Porphyrin Based Supramolecular Systems: Theoretical\nAnalysis Versus Experimental Observations","volume":"25","author":"Osadchuk","year":"2024","journal-title":"ChemPhysChem"},{"key":"2026092310072879900_cit53","doi-asserted-by":"publisher","first-page":"100","DOI":"10.1016\/j.jphotochem.2011.10.026","article-title":"The Dynamics and Origin of the Unrelaxed Fluorescence of Free-Base\nTetraphenylporphyrin","volume":"234","author":"Bia\u0142kowski","year":"2012","journal-title":"J. Photochem. Photobiol.,\nA"},{"key":"2026092310072879900_cit54","doi-asserted-by":"publisher","first-page":"177","DOI":"10.1016\/S0009-2614(99)00688-0","article-title":"Excitation Relaxation\nof Zinc and Free-Base Porphyrin Probed by Femtosecond Fluorescence\nSpectroscopy","volume":"309","author":"Akimoto","year":"1999","journal-title":"Chem. Phys. Lett."},{"key":"2026092310072879900_cit55","doi-asserted-by":"publisher","first-page":"4001","DOI":"10.1021\/jp9941256","article-title":"Internal Conversion\nand Vibronic Relaxation from Higher Excited Electronic State of Porphyrins:\nFemtosecond Fluorescence Dynamics Studies","volume":"104","author":"Mataga","year":"2000","journal-title":"J.\nPhys. Chem. B"},{"key":"2026092310072879900_cit56","doi-asserted-by":"publisher","first-page":"6092","DOI":"10.1039\/b207421d","article-title":"Femtosecond\nRelaxation Processes from Upper Excited States of Tetrakis(N-Methyl-4-Pyridyl)Porphyrins\nStudied by Transient Absorption Spectroscopy","volume":"4","author":"Enescu","year":"2002","journal-title":"Phys. Chem. Chem. Phys."},{"key":"2026092310072879900_cit57","doi-asserted-by":"publisher","first-page":"9837","DOI":"10.1021\/jp020398g","article-title":"Ultrafast Dynamics of Porphyrins\nin the Condensed Phase: I. Free Base Tetraphenylporphyrin","volume":"106","author":"Baskin","year":"2002","journal-title":"J. Phys. Chem. A"},{"key":"2026092310072879900_cit58","doi-asserted-by":"publisher","first-page":"21720","DOI":"10.1021\/acs.jpcc.5c07515","article-title":"Ultrafast Excited-State Dynamics of a Porphyrin\u2013OPE\nConjugate: Energy Transfer and Aggregation Effects","volume":"129","author":"Tumbarello","year":"2025","journal-title":"J. Phys. Chem. C"},{"key":"2026092310072879900_cit59","doi-asserted-by":"publisher","first-page":"10171","DOI":"10.1021\/ja711222c","article-title":"Dynamics of Excited-State\nConformational Relaxation and Electronic Delocalization in Conjugated\nPorphyrin Oligomers","volume":"130","author":"Chang","year":"2008","journal-title":"J. Am. Chem. Soc."}],"container-title":["ACS Physical Chemistry Au"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/pubs.acs.org\/doi\/pdf\/10.1021\/acsphyschemau.6c00042","content-type":"application\/pdf","content-version":"vor","intended-application":"unspecified"},{"URL":"https:\/\/pubs.acs.org\/apcach\/article-pdf\/6\/5\/1083\/66261400\/acsphyschemau.6c00042.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"syndication"},{"URL":"https:\/\/pubs.acs.org\/apcach\/article-pdf\/6\/5\/1083\/66261400\/acsphyschemau.6c00042.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,9,23]],"date-time":"2026-09-23T15:45:05Z","timestamp":1790178305000},"score":1,"resource":{"primary":{"URL":"https:\/\/pubs.acs.org\/apcach\/article\/6\/5\/1083\/5232800\/Implications-of-Intramolecular-Interactions-on-the"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,6,3]]},"references-count":59,"journal-issue":{"issue":"5","published-online":{"date-parts":[[2026,6,3]]},"published-print":{"date-parts":[[2026,9,23]]}},"URL":"https:\/\/doi.org\/10.1021\/acsphyschemau.6c00042","relation":{},"ISSN":["2694-2445"],"issn-type":[{"value":"2694-2445","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,6,3]]}}}