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Beckwith JS, Aster A, Vauthey E. The excited-state dynamics of the radical anions of cyanoanthracenes. Phys Chem Chem Phys 2021; 24:568-577. [PMID: 34904984 PMCID: PMC8694058 DOI: 10.1039/d1cp04014f] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Accepted: 11/29/2021] [Indexed: 12/03/2022]
Abstract
The radical anion of 9,10-dicyanoanthracene (DCA) has been suggested to be a promising chromophore for photoredox chemistry, due to its nanosecond excited-state lifetime determined from indirect measurements. Here, we investigate the excited-state dynamics of the radical anion of three cyanoanthracenes, including DCA˙-, produced by photoinduced electron transfer in liquid using both pump-probe and pump-pump probe transient electronic absorption spectroscopy. All three excited radical ions are characterised by a 3-5 ps lifetime, due to efficient non-radiative deactivation to the ground state. The decay pathway most probably involves D1/D0 conical intersection(s), whose presence is favoured by the enhanced flexibility of the radical anions relative to their neutral counterparts. The origin of the discrepancy with the nanosecond lifetime of DCA˙-* reported previously is discussed. These very short lifetimes limit, but do not preclude, photochemical applications of the cyanoanthracene anions.
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Affiliation(s)
- Joseph S Beckwith
- Department of Physical Chemistry, University of Geneva, 30 Quai Ernest-Ansermet, CH-1211 Geneva 4, Switzerland.
| | - Alexander Aster
- Department of Physical Chemistry, University of Geneva, 30 Quai Ernest-Ansermet, CH-1211 Geneva 4, Switzerland.
| | - Eric Vauthey
- Department of Physical Chemistry, University of Geneva, 30 Quai Ernest-Ansermet, CH-1211 Geneva 4, Switzerland.
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Kochman MA, Durbeej B, Kubas A. Simulation and Analysis of the Transient Absorption Spectrum of 4-( N, N-Dimethylamino)benzonitrile (DMABN) in Acetonitrile. J Phys Chem A 2021; 125:8635-8648. [PMID: 34550700 PMCID: PMC8503879 DOI: 10.1021/acs.jpca.1c06166] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2021] [Revised: 09/03/2021] [Indexed: 12/17/2022]
Abstract
4-(N,N-Dimethylamino)benzonitrile (DMABN) is a well-known model compound for dual fluorescence-in sufficiently polar solvents, it exhibits two distinct fluorescence emission bands. The interpretation of its transient absorption (TA) spectrum in the visible range is the subject of a long-standing controversy. In the present study, we resolve this issue by calculating the TA spectrum on the basis of nonadiabatic molecular dynamics simulations. An unambiguous assignment of spectral signals to specific excited-state structures is achieved by breaking down the calculated spectrum into contributions from twisted and nontwisted molecular geometries. In particular, the much-discussed excited-state absorption band near 1.7 eV (ca. 700 nm) is attributed to the near-planar locally excited (LE) minimum on the S1 state. On the technical side, our study demonstrates that the second-order approximate coupled cluster singles and doubles (CC2) method can be used successfully to calculate the TA spectra of moderately large organic molecules, provided that the system in question does not approach a crossing between the lowest excited state and the singlet ground state within the time frame of the simulation.
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Affiliation(s)
- Michał Andrzej Kochman
- Institute
of Physical Chemistry, Polish Academy of
Sciences, Ul. Marcina Kasprzaka 44/52, 01-224 Warszawa, Poland
| | - Bo Durbeej
- Division
of Theoretical Chemistry, Department of Physics, Chemistry and Biology
(IFM), Linköping University, 581 83 Linköping, Sweden
| | - Adam Kubas
- Institute
of Physical Chemistry, Polish Academy of
Sciences, Ul. Marcina Kasprzaka 44/52, 01-224 Warszawa, Poland
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Nazarov AE, Ivanov AI. Effect of the transition rate between two excited states on the spectral dynamics of dual fluorescence: Blurring of the isoemissive point. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2020.112881] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Beckwith JS, Rumble CA, Vauthey E. Data analysis in transient electronic spectroscopy – an experimentalist's view. INT REV PHYS CHEM 2020. [DOI: 10.1080/0144235x.2020.1757942] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Joseph S. Beckwith
- Department of Physical Chemistry, University of Geneva, Geneva, Switzerland
| | | | - Eric Vauthey
- Department of Physical Chemistry, University of Geneva, Geneva, Switzerland
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Fedunov RG, Yermolenko IP, Nazarov AE, Ivanov AI, Rosspeintner A, Angulo G. Theory of fluorescence spectrum dynamics and its application to determining the relaxation characteristics of the solvent and intramolecular vibrations. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2019.112016] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Beckwith JS, Lang B, Grilj J, Vauthey E. Ion-Pair Dynamics upon Photoinduced Electron Transfer Monitored by Pump-Pump-Probe Spectroscopy. J Phys Chem Lett 2019; 10:3688-3693. [PMID: 31194559 DOI: 10.1021/acs.jpclett.9b01431] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The excited-state dynamics of the radical anion of perylene (Pe) generated upon bimolecular photoinduced electron transfer (PET) with a donor was investigated using broadband pump-pump-probe spectroscopy. It was found to depend on the age of the anion, that is, on the time interval between the first pump pulse that triggers PET and the second one that excites the ensuing Pe anion (Pe•-). These differences, observed in acetonitrile but not in tetrahydrofuran, report on the evolution of the PET product from an ion pair to free ions. Two photoinduced charge recombination pathways of the ion pair to the neutral Pe*(S1) + donor state were identified: one occurring in a few picoseconds from Pe•-*(D1) and one taking place within 100-200 fs from Pe•-*(D n>1). Both processes are sensitive to the interionic distance over different length scales and thus serve as molecular rulers.
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Affiliation(s)
- Joseph S Beckwith
- Department of Physical Chemistry , University of Geneva , 30 Quai Ernest-Ansermet , CH-1211 Geneva , Switzerland
| | - Bernhard Lang
- Department of Physical Chemistry , University of Geneva , 30 Quai Ernest-Ansermet , CH-1211 Geneva , Switzerland
| | - Jakob Grilj
- Department of Physical Chemistry , University of Geneva , 30 Quai Ernest-Ansermet , CH-1211 Geneva , Switzerland
| | - Eric Vauthey
- Department of Physical Chemistry , University of Geneva , 30 Quai Ernest-Ansermet , CH-1211 Geneva , Switzerland
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Hernández FJ, Bonafé FP, Aradi B, Frauenheim T, Sánchez CG. Simulation of Impulsive Vibrational Spectroscopy. J Phys Chem A 2019; 123:2065-2072. [DOI: 10.1021/acs.jpca.9b00307] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Federico J. Hernández
- Universidad Nacional de Córdoba. Facultad de Ciencias Quı́micas, Departamento de Quı́mica Teórica y Computacional, Córdoba Argentina
- Instituto de Investigaciones en Fisicoquímica de Córdoba, INFIQC (CONICET-Universidad Nacional de Córdoba), Córdoba 5000, Argentina
| | - Franco P. Bonafé
- Universidad Nacional de Córdoba. Facultad de Ciencias Quı́micas, Departamento de Quı́mica Teórica y Computacional, Córdoba Argentina
- Instituto de Investigaciones en Fisicoquímica de Córdoba, INFIQC (CONICET-Universidad Nacional de Córdoba), Córdoba 5000, Argentina
| | - Bálint Aradi
- Bremen Center for Computational Materials Science, Universität Bremen, Bremen 28359, Germany
| | - Thomas Frauenheim
- Bremen Center for Computational Materials Science, Universität Bremen, Bremen 28359, Germany
| | - Cristián G. Sánchez
- Universidad Nacional de Córdoba. Facultad de Ciencias Quı́micas, Departamento de Quı́mica Teórica y Computacional, Córdoba Argentina
- Instituto de Investigaciones en Fisicoquímica de Córdoba, INFIQC (CONICET-Universidad Nacional de Córdoba), Córdoba 5000, Argentina
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Bondarev SL, Tikhomirov SA, Buganov OV, Knyukshto VN, Galinovskii NA, Fedunov RG, Khokhlova SS, Ivanov AI. Spectral Dynamics of Nitro Derivatives of Xanthione in Solutions. J Phys Chem A 2019; 123:1570-1580. [DOI: 10.1021/acs.jpca.8b11146] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Stanislav L. Bondarev
- B. I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, Prospect Nezavisimosti 68, Minsk BY-220072, Republic of Belarus
| | - Sergei A. Tikhomirov
- B. I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, Prospect Nezavisimosti 68, Minsk BY-220072, Republic of Belarus
| | - Oleg V. Buganov
- B. I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, Prospect Nezavisimosti 68, Minsk BY-220072, Republic of Belarus
| | - Valeri N. Knyukshto
- B. I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, Prospect Nezavisimosti 68, Minsk BY-220072, Republic of Belarus
| | - Nikolaii A. Galinovskii
- Institute of Chemistry of New Materials, National Academy of Sciences of Belarus, 36, Fr. Skaryna Street, Minsk BY-220141, Republic of Belarus
| | - Roman G. Fedunov
- Volgograd State University, University Avenue 100, Volgograd 400062, Russia
| | | | - Anatoly I. Ivanov
- Volgograd State University, University Avenue 100, Volgograd 400062, Russia
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Angiolini L, Cohen B, Douhal A. Ultrafast dynamics of the antibiotic Rifampicin in solution. Photochem Photobiol Sci 2019; 18:80-91. [DOI: 10.1039/c8pp00192h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ultrafast time-resolved studies demonstrate that intra- and intermolecular H-bonds with water molecules act synergistically to stabilize the active zwitterionic form of Rifampicin, an effective antibiotic against mycobacterial infections.
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Affiliation(s)
- Lorenzo Angiolini
- Departamento de Química Física
- Facultad de Ciencias Ambientales y Bioquímica and INAMOL
- Universidad de Castilla-La Mancha
- 45071 Toledo
- Spain
| | - Boiko Cohen
- Departamento de Química Física
- Facultad de Ciencias Ambientales y Bioquímica and INAMOL
- Universidad de Castilla-La Mancha
- 45071 Toledo
- Spain
| | - Abderrazzak Douhal
- Departamento de Química Física
- Facultad de Ciencias Ambientales y Bioquímica and INAMOL
- Universidad de Castilla-La Mancha
- 45071 Toledo
- Spain
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Fedunov RG, Rogozina MV, Khokhlova SS, Ivanov AI, Tikhomirov SA, Bondarev SL, Raichenok TF, Buganov OV, Olkhovik VK, Vasilevskii DA. Electronic structures and population dynamics of excited states of xanthione and its derivatives. Chem Phys 2017. [DOI: 10.1016/j.chemphys.2017.07.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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