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Glover WJ, Paz ASP, Thongyod W, Punwong C. Analytical gradients and derivative couplings for dynamically weighted complete active space self-consistent field. J Chem Phys 2019; 151:201101. [DOI: 10.1063/1.5130997] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- W. J. Glover
- NYU Shanghai, 1555 Century Avenue, Shanghai 200122, China
- NYU-ECNU Center for Computational Chemistry at NYU Shanghai, 3663 Zhongshang Road North, Shanghai 200062, China
- Department of Chemistry, New York University, New York, New York 10003, USA
| | - A. S. P. Paz
- NYU Shanghai, 1555 Century Avenue, Shanghai 200122, China
- NYU-ECNU Center for Computational Chemistry at NYU Shanghai, 3663 Zhongshang Road North, Shanghai 200062, China
- Department of Chemistry, New York University, New York, New York 10003, USA
| | - W. Thongyod
- NYU-ECNU Center for Computational Chemistry at NYU Shanghai, 3663 Zhongshang Road North, Shanghai 200062, China
- Department of Physics, Faculty of Science, Prince of Songkla University, Songkhla 90112, Thailand
- Center of Excellence for Trace Analysis and Biosensor, Prince of Songkla University, Songkhla 90112, Thailand
| | - C. Punwong
- Department of Physics, Faculty of Science, Prince of Songkla University, Songkhla 90112, Thailand
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Klaiman S, Cederbaum LS. Barrierless Single-Electron-Induced cis-trans Isomerization. Angew Chem Int Ed Engl 2015; 54:10470-3. [PMID: 26178841 DOI: 10.1002/anie.201502963] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Indexed: 11/09/2022]
Abstract
Lowering the activation energy of a chemical reaction is an essential part in controlling chemical reactions. By attaching a single electron, a barrierless path for the cis-trans isomerization of maleonitrile on the anionic surface is formed. The anionic activation can be applied in both reaction directions, yielding the desired isomer. We identify the microscopic mechanism that leads to the formation of the barrierless route for the electron-induced isomerization. The generalization to other chemical reactions is discussed.
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Affiliation(s)
- Shachar Klaiman
- Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 229, 69120 Heidelberg (Germany).
| | - Lorenz S Cederbaum
- Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 229, 69120 Heidelberg (Germany)
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Klaiman S, Cederbaum LS. Barrierless Single-Electron-Induced cis
-trans
Isomerization. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201502963] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Greenwood JB, Miles J, Camillis SD, Mulholland P, Zhang L, Parkes MA, Hailes HC, Fielding HH. Resonantly Enhanced Multiphoton Ionization Spectrum of the Neutral Green Fluorescent Protein Chromophore. J Phys Chem Lett 2014; 5:3588-3592. [PMID: 26278614 DOI: 10.1021/jz5019256] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The photophysics of the green fluorescent protein is governed by the electronic structure of the chromophore at the heart of its β-barrel protein structure. We present the first two-color, resonance-enhanced, multiphoton ionization spectrum of the isolated neutral chromophore in vacuo with supporting electronic structure calculations. We find the absorption maximum to be 3.65 ± 0.05 eV (340 ± 5 nm), which is blue-shifted by 0.5 eV (55 nm) from the absorption maximum of the protein in its neutral form. Our results show that interactions between the chromophore and the protein have a significant influence on the electronic structure of the neutral chromophore during photoabsorption and provide a benchmark for the rational design of novel chromophores as fluorescent markers or photomanipulators.
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Affiliation(s)
- Jason B Greenwood
- †Centre for Plasma Physics, School of Maths and Physics, Queen's University Belfast, University Road, Belfast BT7 1NN, United Kingdom
| | - Jordan Miles
- †Centre for Plasma Physics, School of Maths and Physics, Queen's University Belfast, University Road, Belfast BT7 1NN, United Kingdom
| | - Simone De Camillis
- †Centre for Plasma Physics, School of Maths and Physics, Queen's University Belfast, University Road, Belfast BT7 1NN, United Kingdom
| | - Peter Mulholland
- †Centre for Plasma Physics, School of Maths and Physics, Queen's University Belfast, University Road, Belfast BT7 1NN, United Kingdom
| | - Lijuan Zhang
- ‡Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom
| | - Michael A Parkes
- ‡Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom
| | - Helen C Hailes
- ‡Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom
| | - Helen H Fielding
- ‡Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom
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