1
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Marín MDC, Agathangelou D, Orozco-Gonzalez Y, Valentini A, Kato Y, Abe-Yoshizumi R, Kandori H, Choi A, Jung KH, Haacke S, Olivucci M. Fluorescence Enhancement of a Microbial Rhodopsin via Electronic Reprogramming. J Am Chem Soc 2018; 141:262-271. [PMID: 30532962 DOI: 10.1021/jacs.8b09311] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The engineering of microbial rhodopsins with enhanced fluorescence is of great importance in the expanding field of optogenetics. Here we report the discovery of two mutants (W76S/Y179F and L83Q) of a sensory rhodopsin from the cyanobacterium Anabaena PCC7120 with opposite fluorescence behavior. In fact, while W76S/Y179F displays, with respect to the wild-type protein, a nearly 10-fold increase in red-light emission, the second is not emissive. Thus, the W76S/Y179F, L83Q pair offers an unprecedented opportunity for the investigation of fluorescence enhancement in microbial rhodopsins, which is pursued by combining transient absorption spectroscopy and multiconfigurational quantum chemistry. The results of such an investigation point to an isomerization-blocking electronic effect as the direct cause of instantaneous (subpicosecond) fluorescence enhancement.
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Affiliation(s)
- María Del Carmen Marín
- Biotechnology, Pharmacy and Chemistry Department , University of Siena , Siena 53100 , Italy.,Chemistry Department , Bowling Green State University , Bowling Green , Ohio 43403 , United States
| | - Damianos Agathangelou
- University of Strasbourg-CNRS , Institute of Physics and Chemistry of Materials of Strasbourg , 67034 Strasbourg , France
| | - Yoelvis Orozco-Gonzalez
- Chemistry Department , Bowling Green State University , Bowling Green , Ohio 43403 , United States.,Université de Strasbourg , USIAS Institut d'Études Avanceés , 67083 Strasbourg , France
| | - Alessio Valentini
- Theoretical Physical Chemistry , UR Molsys, University of Liège , Liège , Belgium
| | - Yoshitaka Kato
- Department of Life Science and Applied Chemistry , Nagoya Institute of Technology , Showa-ku , Nagoya 466-8555 , Japan
| | - Rei Abe-Yoshizumi
- Department of Life Science and Applied Chemistry , Nagoya Institute of Technology , Showa-ku , Nagoya 466-8555 , Japan.,OptoBioTechnology Research Center , Nagoya Institute of Technology , Showa-ku , Nagoya 466-8555 , Japan
| | - Hideki Kandori
- Department of Life Science and Applied Chemistry , Nagoya Institute of Technology , Showa-ku , Nagoya 466-8555 , Japan.,OptoBioTechnology Research Center , Nagoya Institute of Technology , Showa-ku , Nagoya 466-8555 , Japan
| | - Ahreum Choi
- Department of Life Science and Institute of Biological Interfaces , Sogang University , Sogang 04107 , South Korea
| | - Kwang-Hwan Jung
- Department of Life Science and Institute of Biological Interfaces , Sogang University , Sogang 04107 , South Korea
| | - Stefan Haacke
- University of Strasbourg-CNRS , Institute of Physics and Chemistry of Materials of Strasbourg , 67034 Strasbourg , France
| | - Massimo Olivucci
- Biotechnology, Pharmacy and Chemistry Department , University of Siena , Siena 53100 , Italy.,Chemistry Department , Bowling Green State University , Bowling Green , Ohio 43403 , United States.,Université de Strasbourg , USIAS Institut d'Études Avanceés , 67083 Strasbourg , France
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2
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El-Tahawy MMT, Nenov A, Weingart O, Olivucci M, Garavelli M. Relationship between Excited State Lifetime and Isomerization Quantum Yield in Animal Rhodopsins: Beyond the One-Dimensional Landau-Zener Model. J Phys Chem Lett 2018; 9:3315-3322. [PMID: 29791163 PMCID: PMC6650607 DOI: 10.1021/acs.jpclett.8b01062] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
We show that the speed of the chromophore photoisomerization of animal rhodopsins is not a relevant control knob for their light sensitivity. This result is at odds with the momentum-driven tunnelling rationale (i.e., assuming a one-dimensional Landau-Zener model for the decay: Zener, C. Non-Adiabatic Crossing of Energy Levels. Proc. R. Soc. London, Ser. A 1932, 137 (833), 696-702) holding that a faster nuclear motion through the conical intersection translates into a higher quantum yield and, thus, light sensitivity. Instead, a model based on the phase-matching of specific excited state vibrational modes should be considered. Using extensive semiclassical hybrid quantum mechanics/molecular mechanics trajectory computations to simulate the photoisomerization of three animal rhodopsin models (visual rhodopsin, squid rhodopsin and human melanopsin), we also demonstrate that phase-matching between three different modes (the reactive carbon and hydrogen twisting coordinates and the bond length alternation mode) is required to achieve high quantum yields. In fact, such "phase-matching" mechanism explains the computational results and provides a tool for the prediction of the photoisomerization outcome in retinal proteins.
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Affiliation(s)
- Mohsen M. T. El-Tahawy
- Dipartimento di Chimica Industriale “Toso Montanari″, Università degli Studi di Bologna, Viale del Risorgimento, 4I -40136 Bologna, Italy
- Chemistry Department, Faculty of Science, Damanhour University, Damanhour 22511, Egypt
| | - Artur Nenov
- Dipartimento di Chimica Industriale “Toso Montanari″, Università degli Studi di Bologna, Viale del Risorgimento, 4I -40136 Bologna, Italy
| | - Oliver Weingart
- Institut für Theoretische Chemie und Computerchemie, Heinrich-Heine-Universität Düsseldorf, Universitätsstr. 1, 40225 Düsseldorf, Germany
| | - Massimo Olivucci
- Dipartimento di Biotecnologie, Chimica e Farmacia, Università di Siena, I-53100 Siena, Italy
- Chemistry Department, Bowling Green State University, Bowling Green, OH 43403
- Corresponding Author; (M.O.): ; Phone: +39 051 20 9 9476. Fax: +39 051 20 9 9456 (M.G.)
| | - Marco Garavelli
- Dipartimento di Chimica Industriale “Toso Montanari″, Università degli Studi di Bologna, Viale del Risorgimento, 4I -40136 Bologna, Italy
- Corresponding Author; (M.O.): ; Phone: +39 051 20 9 9476. Fax: +39 051 20 9 9456 (M.G.)
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3
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Barata-Morgado R, Sánchez ML, Muñoz-Losa A, Martín ME, Olivares Del Valle FJ, Aguilar MA. How Methylation Modifies the Photophysics of the Native All- trans-Retinal Protonated Schiff Base: A CASPT2/MD Study in Gas Phase and in Methanol. J Phys Chem A 2018; 122:3096-3106. [PMID: 29489369 DOI: 10.1021/acs.jpca.8b00773] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A comparison between the free-energy surfaces of the all- trans-retinal protonated Schiff base (RPSB) and its 10-methylated derivative in gas phase and methanol solution is performed at CASSCF//CASSCF and CASPT2//CASSCF levels. Solvent effects were included using the average solvent electrostatic potential from molecular dynamics method. This is a QM/MM (quantum mechanics/molecular mechanics) method that makes use of the mean field approximation. It is found that the methyl group bonded to C10 produces noticeable changes in the solution free-energy profile of the S1 excited state, mainly in the relative stability of the minimum energy conical intersections (MECIs) with respect to the Franck-Condon (FC) point. The conical intersections yielding the 9- cis and 11- cis isomers are stabilized while that yielding the 13- cis isomer is destabilized; in fact, it becomes inaccessible by excitation to S1. Furthermore, the planar S1 minimum is not present in the methylated compound. The solvent notably stabilizes the S2 excited state at the FC geometry. Therefore, if the S2 state has an effect on the photoisomerization dynamics, it must be because it permits the RPSB population to branch around the FC point. All these changes combine to speed up the photoisomerization in the 10-methylated compound with respect to the native compound.
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Affiliation(s)
- Rute Barata-Morgado
- Área de Química Física , University of Extremadura , Avda. Elvas s/n , Edif. José Ma Viguera Lobo 3a, planta, Badajoz 06006 , Spain
| | - M Luz Sánchez
- Área de Química Física , University of Extremadura , Avda. Elvas s/n , Edif. José Ma Viguera Lobo 3a, planta, Badajoz 06006 , Spain
| | - Aurora Muñoz-Losa
- Dpto. Didáctica de las Ciencias Experimentales y Matemáticas, Facultad de Formación del Profesorado , University of Extremadura , Avda. Universidad s/n , Cáceres 10003 , Spain
| | - M Elena Martín
- Área de Química Física , University of Extremadura , Avda. Elvas s/n , Edif. José Ma Viguera Lobo 3a, planta, Badajoz 06006 , Spain
| | - Francisco J Olivares Del Valle
- Área de Química Física , University of Extremadura , Avda. Elvas s/n , Edif. José Ma Viguera Lobo 3a, planta, Badajoz 06006 , Spain
| | - Manuel A Aguilar
- Área de Química Física , University of Extremadura , Avda. Elvas s/n , Edif. José Ma Viguera Lobo 3a, planta, Badajoz 06006 , Spain
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4
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Gozem S, Luk HL, Schapiro I, Olivucci M. Theory and Simulation of the Ultrafast Double-Bond Isomerization of Biological Chromophores. Chem Rev 2017; 117:13502-13565. [DOI: 10.1021/acs.chemrev.7b00177] [Citation(s) in RCA: 175] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Samer Gozem
- Department
of Chemistry, Georgia State University, Atlanta, Georgia 30302, United States
| | - Hoi Ling Luk
- Chemistry
Department, Bowling Green State University, Overman Hall, Bowling Green, Ohio 43403, United States
| | - Igor Schapiro
- Fritz
Haber Center for Molecular Dynamics, Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Massimo Olivucci
- Chemistry
Department, Bowling Green State University, Overman Hall, Bowling Green, Ohio 43403, United States
- Dipartimento
di Biotecnologie, Chimica e Farmacia, Università di Siena, via A. Moro
2, 53100 Siena, Italy
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5
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García-Prieto FF, Muñoz-Losa A, Fdez Galván I, Sánchez ML, Aguilar MA, Martín ME. QM/MM Study of Substituent and Solvent Effects on the Excited State Dynamics of the Photoactive Yellow Protein Chromophore. J Chem Theory Comput 2017; 13:737-748. [PMID: 28072537 DOI: 10.1021/acs.jctc.6b01069] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Substituent and solvent effects on the excited state dynamics of the Photoactive Yellow Protein chromophore are studied using the average solvent electrostatic potential from molecular dynamics (ASEP/MD) method. Four molecular models were considered: the ester and thioester derivatives of the p-coumaric acid anion and their methylated derivatives. We found that the solvent produces dramatic modifications on the free energy profile of the S1 state: 1) Two twisted structures that are minima in the gas phase could not be located in aqueous solution. 2) Conical intersections (CIs) associated with the rotation of the single bond adjacent to the phenyl group are found for the four derivatives in water solution but only for thio derivatives in the gas phase. 3) The relative stability of minima and CIs is reverted with respect to the gas phase values, affecting the prevalent de-excitation paths. As a consequence of these changes, three competitive de-excitation channels are open in aqueous solution: the fluorescence emission from a planar minimum on S1, the trans-cis photoisomerization through a CI that involves the rotation of the vinyl double bond, and the nonradiative, nonreactive, de-excitation through the CI associated with the rotation of the single bond adjacent to the phenyl group. In the gas phase, the minima are the structures with the lower energy, while in solution these are the conical intersections. In solution, the de-excitation prevalent path seems to be the photoisomerization for oxo compounds, while thio compounds return to the initial trans ground state without emission.
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Affiliation(s)
- Francisco F García-Prieto
- Área de Química Física, University of Extremadura , Avda. Elvas s/n, Edif. José Ma Viguera Lobo 3a planta, Badajoz, 06006 Spain
| | - Aurora Muñoz-Losa
- Área de Química Física, University of Extremadura , Avda. Elvas s/n, Edif. José Ma Viguera Lobo 3a planta, Badajoz, 06006 Spain
| | - Ignacio Fdez Galván
- Department of Chemistry-Ångström, The Theoretical Chemistry Programme, Uppsala University , Box 518, 751 20 Uppsala, Sweden
| | - M Luz Sánchez
- Área de Química Física, University of Extremadura , Avda. Elvas s/n, Edif. José Ma Viguera Lobo 3a planta, Badajoz, 06006 Spain
| | - Manuel A Aguilar
- Área de Química Física, University of Extremadura , Avda. Elvas s/n, Edif. José Ma Viguera Lobo 3a planta, Badajoz, 06006 Spain
| | - M Elena Martín
- Área de Química Física, University of Extremadura , Avda. Elvas s/n, Edif. José Ma Viguera Lobo 3a planta, Badajoz, 06006 Spain
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6
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Mališ M, Novak J, Zgrablić G, Parmigiani F, Došlić N. Mechanism of ultrafast non-reactive deactivation of the retinal chromophore in non-polar solvents. Phys Chem Chem Phys 2017; 19:25970-25978. [DOI: 10.1039/c7cp03293e] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Counterion sensitive photodynamics of the retinal chromophore in solution.
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Affiliation(s)
- M. Mališ
- Department of Physical Chemistry
- Ruđer Bošković Institute
- 10000 Zagreb
- Croatia
- Centre Européen de Calcul Atomique et Moléculaire
| | - J. Novak
- Department of Physical Chemistry
- Ruđer Bošković Institute
- 10000 Zagreb
- Croatia
| | - G. Zgrablić
- Elettra-Sincrotrone Treste
- T-ReX Laboratory
- Trieste
- Italy
- Politehnika Pula
| | - F. Parmigiani
- Elettra-Sincrotrone Treste
- T-ReX Laboratory
- Trieste
- Italy
- Department of Physics
| | - N. Došlić
- Department of Physical Chemistry
- Ruđer Bošković Institute
- 10000 Zagreb
- Croatia
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7
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El-Tahawy MMT, Nenov A, Garavelli M. Photoelectrochromism in the Retinal Protonated Schiff Base Chromophore: Photoisomerization Speed and Selectivity under a Homogeneous Electric Field at Different Operational Regimes. J Chem Theory Comput 2016; 12:4460-75. [DOI: 10.1021/acs.jctc.6b00558] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Mohsen M. T. El-Tahawy
- Dipartimento
di Chimica “G. Ciamician″, Universita’ degli Studi di Bologna, Via Selmi, 2 I - 40126 Bologna, Italy
- Chemistry
Department, Faculty of Science, Damanhour University, Damanhour 22511, Egypt
| | - Artur Nenov
- Dipartimento
di Chimica “G. Ciamician″, Universita’ degli Studi di Bologna, Via Selmi, 2 I - 40126 Bologna, Italy
| | - Marco Garavelli
- Dipartimento
di Chimica “G. Ciamician″, Universita’ degli Studi di Bologna, Via Selmi, 2 I - 40126 Bologna, Italy
- Université
de Lyon, Université Claude Bernard Lyon 1, ENS Lyon, Centre
Nationale de Recherche Scientifique, 46 allée d’Italie, 69007 Lyon Cedex 07, France
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8
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García-Prieto FF, Muñoz-Losa A, Luz Sánchez M, Elena Martín M, Aguilar MA. Solvent effects on de-excitation channels in the p-coumaric acid methyl ester anion, an analogue of the photoactive yellow protein (PYP) chromophore. Phys Chem Chem Phys 2016; 18:27476-27485. [DOI: 10.1039/c6cp03541h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Environmental effects on the deactivation channels of the PYP chromophore in the gas phase and water solution are compared at the CASPT2//CASSCF/cc-pVDZ level.
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Affiliation(s)
| | - Aurora Muñoz-Losa
- Institute of Theoretical Chemistry
- Faculty of Chemistry
- University of Vienna
- A-1090 Vienna
- Austria
| | - M. Luz Sánchez
- Área de Química Física
- University of Extremadura
- 06006 Badajoz
- Spain
| | - M. Elena Martín
- Área de Química Física
- University of Extremadura
- 06006 Badajoz
- Spain
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9
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Wada T, Nakano H, Sato H. Solvatochromic Shift of Brooker's Merocyanine: Hartree-Fock Exchange in Time Dependent Density Functional Calculation and Hydrogen Bonding Effect. J Chem Theory Comput 2015; 10:4535-47. [PMID: 26588147 DOI: 10.1021/ct5004884] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The Brooker's merocyanine exhibits a large hypsochromic shift from an apolar aprotic solvent to a polar protic solvent. Quantum chemical calculations have been performed to study the solvatochromism, but there remained a discrepancy between the calculated and experimental solvatochromic shifts. In this paper we evaluate quantum mechanically the excitation energies of the Brooker's merocyanine in water, methanol, acetonitrile, and dichloromethane to investigate what are important factors to accurately model the solvatochromism of the dye by using TDDFT in combination with implicit and explicit solvation models including the PCM, PCMSMD, RISM-SCF-SEDD, and mean-field QM/MM. The results severely depend on the density functional, especially on the amount of Hartree-Fock exchange included in the functional. Furthermore, an explicit description of the solute-solvent hydrogen bonds makes a non-negligible contribution to the shift. The experimental large solvatochromic shift can be accurately reproduced by the TDDFT/RISM-SCF-SEDD and mean-field QM/MM calculations with the LC-BOP functional, although the excitation energies in solutions are considerably overestimated. We also estimated the excitation energies and the solvatochromic shift at the SAC-CI/RISM-SCF-SEDD and mean-field QM/MM level, which are in very good agreement with the experimental values. These results indicate that if an explicit solvent model is used, TDDFT calculations using such a long-range corrected functional can accurately model the solvatochromism. However, an ab initio quantum chemical method including sufficient electron correlation effects is required to reproduce not only the solvatochromism but also the excitation energies in solutions.
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Affiliation(s)
- Takuya Wada
- Department of Molecular Engineering, Kyoto University, Kyoto Daigaku Katsura , Kyoto 615-8510, Japan
| | - Hiroshi Nakano
- Department of Molecular Engineering, Kyoto University, Kyoto Daigaku Katsura , Kyoto 615-8510, Japan.,Elements Strategy Initiative for Catalysts and Batteries, Kyoto University , Kyoto 615-8245, Japan
| | - Hirofumi Sato
- Department of Molecular Engineering, Kyoto University, Kyoto Daigaku Katsura , Kyoto 615-8510, Japan.,Elements Strategy Initiative for Catalysts and Batteries, Kyoto University , Kyoto 615-8245, Japan
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10
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Molecular bases for the selection of the chromophore of animal rhodopsins. Proc Natl Acad Sci U S A 2015; 112:15297-302. [PMID: 26607446 DOI: 10.1073/pnas.1510262112] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The functions of microbial and animal rhodopsins are triggered by the isomerization of their all-trans and 11-cis retinal chromophores, respectively. To lay the molecular basis driving the evolutionary transition from the all-trans to the 11-cis chromophore, multiconfigurational quantum chemistry is used to compare the isomerization mechanisms of the sensory rhodopsin from the cyanobacterium Anabaena PCC 7120 (ASR) and of the bovine rhodopsin (Rh). It is found that, despite their evolutionary distance, these eubacterial and vertebrate rhodopsins start to isomerize via distinct implementations of the same bicycle-pedal mechanism originally proposed by Warshel [Warshel A (1976) Nature 260:678-683]. However, by following the electronic structure changes of ASR (featuring the all-trans chromophore) during the isomerization, we find that ASR enters a region of degeneracy between the first and second excited states not found in Rh (featuring the 11-cis chromophore). We show that such degeneracy is modulated by the preorganized structure of the chromophore and by the position of the reactive double bond. It is argued that the optimization of the electronic properties of the chromophore, which affects the photoisomerization efficiency and the thermal isomerization barrier, provided a key factor for the emergence of the striking amino acid sequence divergence observed between the microbial and animal rhodopsins.
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11
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Bassolino G, Sovdat T, Soares Duarte A, Lim JM, Schnedermann C, Liebel M, Odell B, Claridge TDW, Fletcher SP, Kukura P. Barrierless Photoisomerization of 11-cis Retinal Protonated Schiff Base in Solution. J Am Chem Soc 2015; 137:12434-7. [DOI: 10.1021/jacs.5b06492] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Giovanni Bassolino
- Department
of Chemistry, Physical and Theoretical Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QZ, U.K
| | - Tina Sovdat
- Department
of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Alex Soares Duarte
- Department
of Chemistry, Physical and Theoretical Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QZ, U.K
| | - Jong Min Lim
- Department
of Chemistry, Physical and Theoretical Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QZ, U.K
| | - Christoph Schnedermann
- Department
of Chemistry, Physical and Theoretical Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QZ, U.K
| | - Matz Liebel
- Department
of Chemistry, Physical and Theoretical Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QZ, U.K
| | - Barbara Odell
- Department
of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Timothy D. W. Claridge
- Department
of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Stephen P. Fletcher
- Department
of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Philipp Kukura
- Department
of Chemistry, Physical and Theoretical Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QZ, U.K
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12
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Punwong C, Owens J, Martínez TJ. Direct QM/MM Excited-State Dynamics of Retinal Protonated Schiff Base in Isolation and Methanol Solution. J Phys Chem B 2014; 119:704-14. [DOI: 10.1021/jp5038798] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Chutintorn Punwong
- Department
of Physics, Faculty of Science, and Trace
Analysis and Biosensor Research Center, Prince of Songkla University, Songkhla 90112, Thailand
| | - Jane Owens
- Department
of Chemistry, University of Illinois, Urbana-Champaign, Illinois 61801, United States
| | - Todd J. Martínez
- Department
of Chemistry and The PULSE Institute, Stanford University, Stanford, California 94305, United States
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, United States
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13
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Frutos-Puerto S, Muñoz-Losa A, Martín ME, Aguilar MA. Theoretical study of the absorption and emission spectra of the anionic p-coumaric methyl ester in gas phase and in solution. COMPUT THEOR CHEM 2014. [DOI: 10.1016/j.comptc.2014.04.025] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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