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Kolek P, Andrzejak M, Uchacz T, Goclon J, Pogocki D, Kisała J, Bankiewicz B, Szlachcic P, Tulej M. LIF spectrum for the localised S 0 → S 1(ππ*) excitation in the H-bonded anthranilic acid dimer: Symmetry breaking or coupling of vibrations. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 319:124491. [PMID: 38823243 DOI: 10.1016/j.saa.2024.124491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 03/07/2024] [Accepted: 05/19/2024] [Indexed: 06/03/2024]
Abstract
This study aims to investigate the impact of the π → π* excitation localised in one monomer on the equilibrium geometry and oscillations of the AA dimer. Several low-frequency vibrations appear in pairs in the LIF spectrum because oscillations involving intermolecular hydrogen bonds are coupled, generating approximately symmetric and antisymmetric combinations (especially the COOH rocking modes, LIF: 295 and 301 cm-1). Furthermore, quantitative evaluation based on the TDDFT(B3LYP) results indicates that a dozen among 90 intramolecular oscillations are strongly coupled. In contrast, most vibrations are decoupled or weakly coupled, since they involve remote parts of the monomers. This makes several single vibrations active in the LIF spectrum (including the bending mode of the NH···O intramolecular hydrogen bond associated the strongest vibronic band 442 cm-1), while the other in each pair remains inactive. The reason for decoupling of oscillations and symmetry breaking is that the π → π* electronic excitation is entirely localised within one of the monomers, which makes them no longer equivalent in terms of geometry and dynamics. Additionally, the excitation of one monomer induces strengthening and shortening by 6 pm of only one intermolecular hydrogen bond linking the carboxylic groups of both molecules. This causes the 1.7° in-plane distortion of the dimer and lowering of its symmetry to Cs group (from C2h for the S0 state). The distortion induces the activity of two low-frequency in-plane intermolecular vibrations, i.e. the geared oscillation (LIF: 58 cm-1) and the shearing motion (99 cm-1) of the monomers.
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Affiliation(s)
- Przemysław Kolek
- Institute of Physics, University of Rzeszów, 1 Pigonia Street, 35-310 Rzeszów, Poland.
| | - Marcin Andrzejak
- K. Gumiński Department of Theoretical Chemistry, Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland
| | - Tomasz Uchacz
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland
| | - Jakub Goclon
- Faculty of Chemistry, University of Bialystok, Ciolkowskiego 1K, 15-245 Bialystok, Poland
| | - Dariusz Pogocki
- Institute of Nuclear Chemistry and Technology, Dorodna 16, 03-195 Warsaw, Poland
| | - Joanna Kisała
- Institute of Biology University of Rzeszow, 1 Pigonia Street, 35-310 Rzeszow, Poland
| | - Barbara Bankiewicz
- Faculty of Chemistry, University of Bialystok, Ciolkowskiego 1K, 15-245 Bialystok, Poland
| | - Paweł Szlachcic
- Department of Chemistry, Faculty of Food Technology, University of Agriculture in Krakow, ul. Balicka 122, PL-31-149 Kraków, Poland
| | - Marek Tulej
- Physics Institute, Space Research and Planetary Sciences, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland
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Wavepacket insights into the photoprotection mechanism of the UV filter methyl anthranilate. Nat Commun 2018; 9:5188. [PMID: 30518753 PMCID: PMC6281654 DOI: 10.1038/s41467-018-07681-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Accepted: 11/16/2018] [Indexed: 12/23/2022] Open
Abstract
Meradimate is a broad-spectrum ultraviolet absorber used as a chemical filter in commercial sunscreens. Herein, we explore the ultrafast photodynamics occurring in methyl anthranilate (precursor to Meradimate) immediately after photoexcitation with ultraviolet radiation to understand the mechanisms underpinning Meradimate photoprotection. Using time-resolved photoelectron spectroscopy, signal from the first singlet excited state of methyl anthranilate shows an oscillatory behavior, i.e., quantum beats. Our studies reveal a dependence of the observed beating frequencies on photoexcitation wavelength and photoelectron kinetic energy, unveiling the different Franck-Condon overlaps between the vibrational levels of the ground electronic, first electronic excited, and ground cationic states of methyl anthranilate. By evaluating the behavior of these beats with increasing photon energy, we find evidence for intramolecular vibrational energy redistribution on the first electronic excited state. Such energy redistribution hinders efficient relaxation of the electronic excited state, making methyl anthranilate a poor choice for an efficient, efficacious sunscreen chemical filter. Here, the authors explore the ultrafast photodynamics of methyl anthranilate. From the quantum beat behavior, the authors find evidence for ultrafast energy redistribution processes which hinder excited state relaxation, making methyl anthranilate a poor choice for a sunscreen chemical filter.
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Ray J, Ramesh SG. Conical intersections involving the lowest 1πσ∗ state in aniline: Role of the NH2 group. Chem Phys 2018. [DOI: 10.1016/j.chemphys.2018.03.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Kolek P, Andrzejak M, Hakalla R, Szajna W. Quantitatively Adequate Calculations of the H-Chelate Ring Distortion upon the S0 → S1(ππ*) Excitation in Internally H-Bonded o-Anthranilic Acid: CC2 Coupled-Cluster versus TDDFT. J Phys Chem A 2018; 122:6243-6255. [DOI: 10.1021/acs.jpca.8b04973] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Przemysław Kolek
- Department of Experimental Physics, Faculty of Mathematics and Natural Sciences, University of Rzeszów, 1 Pigonia Street, PL-35-310 Rzeszów, Poland
| | - Marcin Andrzejak
- K. Gumiński Department of Theoretical Chemistry, Faculty of Chemistry, Jagiellonian University, Krakόw, 30-060, Poland
| | - Rafał Hakalla
- Department of Experimental Physics, Faculty of Mathematics and Natural Sciences, University of Rzeszów, 1 Pigonia Street, PL-35-310 Rzeszów, Poland
| | - Wojciech Szajna
- Department of Experimental Physics, Faculty of Mathematics and Natural Sciences, University of Rzeszów, 1 Pigonia Street, PL-35-310 Rzeszów, Poland
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Vogt N, Savelyev DS, Giricheva NI, Islyaikin MK, Girichev GV. Accurate Determination of Equilibrium Structure of 3-Aminophthalonitrile by Gas Electron Diffraction and Coupled-Cluster Computations: Structural Effects Due to Intramolecular Charge Transfer. J Phys Chem A 2016; 120:8853-8861. [DOI: 10.1021/acs.jpca.6b08241] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Natalja Vogt
- Section
of Chemical Information Systems, Faculty of Sciences, University of Ulm, 89069 Ulm, Germany
- Department
of Chemistry, Lomonosov Moscow State University, 119992 Moscow, Russia
| | - Denis S. Savelyev
- Section
of Chemical Information Systems, Faculty of Sciences, University of Ulm, 89069 Ulm, Germany
- Department
of Physics, Ivanovo State University of Chemical Technology, 153025 Ivanovo, Russia
| | - Nina I. Giricheva
- Department
of Organic and Physical Chemistry, Ivanovo State University, 153000 Ivanovo, Russia
| | - Mikhail K. Islyaikin
- Department
of Fine Organic Synthesis Technology, Ivanovo State University of Chemical Technology, 153000 Ivanovo, Russia
| | - Georgiy V. Girichev
- Department
of Physics, Ivanovo State University of Chemical Technology, 153025 Ivanovo, Russia
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Sala M, Kirkby OM, Guérin S, Fielding HH. New insight into the potential energy landscape and relaxation pathways of photoexcited aniline from CASSCF and XMCQDPT2 electronic structure calculations. Phys Chem Chem Phys 2014; 16:3122-33. [DOI: 10.1039/c3cp54418d] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
New insight into the nonadiabatic relaxation dynamics of aniline following excitation to its first three singlet excited states, 11ππ*, 11π3s/πσ* and 21ππ*.
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Affiliation(s)
- Matthieu Sala
- Laboratoire Interdisciplinaire Carnot de Bourgogne UMR 5209 CNRS
- Université de Bourgogne
- F-21078 Dijon, France
| | - Oliver M. Kirkby
- Department of Chemistry
- University College London
- London WC1H 0AJ, UK
| | - Stéphane Guérin
- Laboratoire Interdisciplinaire Carnot de Bourgogne UMR 5209 CNRS
- Université de Bourgogne
- F-21078 Dijon, France
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Andrzejak M, Kolek P. Theoretical modeling of deuteration-induced shifts of the 0-0 bands in absorption spectra of selected aromatic amines: the role of the double-well potential. J Phys Chem A 2013; 117:12770-82. [PMID: 24219819 DOI: 10.1021/jp407987y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The harmonic approximation fails for inversion of the NH2 group in the ground state of aromatic amines as this vibration is characterized by a symmetric double-well potential with relatively small energy barrier. In such cases, the standard harmonic vibrational analysis is inapplicable: the inversion frequency calculated for the bottom of the potential well is strongly overestimated, while it attains imaginary values for the planar conformation of the molecule. The model calculations are discussed taking explicitly into account the presence of the double-well potential. The study is initially focused on reproduction of the deuteration-induced shifts of the 0-0 absorption band for anthranilic acid. The (incorrect) harmonic frequency of the NH2 inversion is replaced by a better one, obtained from numerical calculations employing a simple, quartic-quadratic model for the double-well potential, which is parametrized using just the harmonic frequency of the inversion and the height of the energy barrier. This operation brings theoretical results to qualitative agreement with experiment. A still better match is achieved with a modified version of the model that accounts for mixing of the NH2 inversion mode with other normal modes while retaining the initial simplicity of one-dimensional approach. The corrected results show surprisingly good accuracy, with deviations of the calculated shifts from the experimental values reduced to less than 5 cm(-1). In order to test the performance of the model for systems with higher energy barrier for the NH2 inversion, we have measured the LIF excitation spectra of three different amminobenzonitriles. Partial assignment of the 0-0 bands has been achieved based on their relative intensities for samples with different isotopic exchange ratios. Calculated shifts are in excellent agreement with experimental values for the identified bands. Theoretical predictions are used to complete the assignment of the 0-0 bands in the spectra of the studied amminobenzonitriles.
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Affiliation(s)
- Marcin Andrzejak
- K. Gumiński Department of Theoretical Chemistry, Faculty of Chemistry, Jagiellonian University , Kraków, 30-060, Poland
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McCarthy A, Ruth AA. Fluorescence excitation and excited state intramolecular proton transfer of jet-cooled naphthol derivatives: Part 1. 1-hydroxy-2-naphthaldehyde. Phys Chem Chem Phys 2011; 13:7485-99. [DOI: 10.1039/c0cp02601h] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Szczepanik B, Styrcz S, Góra M. Protolytic dissociation of cyanoanilines in the ground and excited state in water and methanol solutions. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2008; 71:403-409. [PMID: 18378186 DOI: 10.1016/j.saa.2008.01.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2007] [Accepted: 01/02/2008] [Indexed: 05/26/2023]
Abstract
The effect of cyano substituents on the photoacidity of mono- and dicyanoanilines has been investigated. It was demonstrated that the cyano substitution increases significantly the acidity of aniline derivatives in the excited state in comparison to the ground state. 3,5-Dicyanoaniline is the strongest acid in the lowest excited singlet state, while 4-cyanoaniline is the weakest one. The derivatives of aniline with two cyano groups in o,o'-position show different properties from those characteristic for aniline and other investigated cyanoanilines. In the methanol solution with sodium methanolate the anions of 2,6-dicyano-3,5-dimethylaniline and 2,6-dicyano-3,5-diphenylaniline appear already in the ground state. The electronic ground and excited state charge distributions and dipole moments of all investigated cyanoanilines have been evaluated by ab initio calculations using the GAMESS program.
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Affiliation(s)
- Beata Szczepanik
- Institute of Chemistry, Swietokrzyska Academy, Checinska 5, 25-020 Kielce, Poland.
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Yi C, Blum C, Liu SX, Frei G, Neels A, Renaud P, Leutwyler S, Decurtins S. An Efficient and Facile Synthesis of Highly Substituted 2,6-Dicyanoanilines. J Org Chem 2008; 73:3596-9. [DOI: 10.1021/jo800260b] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Chenyi Yi
- Departement für Chemie und Biochemie, Universität Bern, Freiestrasse 3, CH-3012 Bern, Switzerland, and Institut de Microtechnique, Université de Neuchâtel, Rue Jaquet Droz 1, CH-2002 Neuchâtel, Switzerland
| | - Carmen Blum
- Departement für Chemie und Biochemie, Universität Bern, Freiestrasse 3, CH-3012 Bern, Switzerland, and Institut de Microtechnique, Université de Neuchâtel, Rue Jaquet Droz 1, CH-2002 Neuchâtel, Switzerland
| | - Shi-Xia Liu
- Departement für Chemie und Biochemie, Universität Bern, Freiestrasse 3, CH-3012 Bern, Switzerland, and Institut de Microtechnique, Université de Neuchâtel, Rue Jaquet Droz 1, CH-2002 Neuchâtel, Switzerland
| | - Gabriela Frei
- Departement für Chemie und Biochemie, Universität Bern, Freiestrasse 3, CH-3012 Bern, Switzerland, and Institut de Microtechnique, Université de Neuchâtel, Rue Jaquet Droz 1, CH-2002 Neuchâtel, Switzerland
| | - Antonia Neels
- Departement für Chemie und Biochemie, Universität Bern, Freiestrasse 3, CH-3012 Bern, Switzerland, and Institut de Microtechnique, Université de Neuchâtel, Rue Jaquet Droz 1, CH-2002 Neuchâtel, Switzerland
| | - Philippe Renaud
- Departement für Chemie und Biochemie, Universität Bern, Freiestrasse 3, CH-3012 Bern, Switzerland, and Institut de Microtechnique, Université de Neuchâtel, Rue Jaquet Droz 1, CH-2002 Neuchâtel, Switzerland
| | - Samuel Leutwyler
- Departement für Chemie und Biochemie, Universität Bern, Freiestrasse 3, CH-3012 Bern, Switzerland, and Institut de Microtechnique, Université de Neuchâtel, Rue Jaquet Droz 1, CH-2002 Neuchâtel, Switzerland
| | - Silvio Decurtins
- Departement für Chemie und Biochemie, Universität Bern, Freiestrasse 3, CH-3012 Bern, Switzerland, and Institut de Microtechnique, Université de Neuchâtel, Rue Jaquet Droz 1, CH-2002 Neuchâtel, Switzerland
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Oshima J, Yoshihara T, Tobita S. Water-induced fluorescence quenching of mono- and dicyanoanilines. Chem Phys Lett 2006. [DOI: 10.1016/j.cplett.2006.03.073] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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12
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Drougas E, Philis JG, Kosmas AM. Ab initio study of the structure of aniline in the S1 and S2 ππ* states. ACTA ACUST UNITED AC 2006. [DOI: 10.1016/j.theochem.2005.06.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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13
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Wu C, He Y, Kong W. Two-color two-photon REMPI and ZEKE spectroscopy of supersonically cooled o-aminobenzoic acid. Chem Phys Lett 2004. [DOI: 10.1016/j.cplett.2004.09.095] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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