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Al-Jabour S, Baer M, Deeb O, Leibscher M, Manz J, Xu X, Zilberg S. Molecular Symmetry Properties of Conical Intersections and Nonadiabatic Coupling Terms: Theory and Quantum Chemical Demonstration for Cyclopenta-2,4-dienimine (C5H4NH). J Phys Chem A 2009; 114:2991-3010. [DOI: 10.1021/jp905038t] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- S. Al-Jabour
- Institut für Chemie und Biochemie, Freie Universität Berlin, Germany, Faculty of Pharmacy, Al-Quds University, Palestine, The Fritz Haber Center for Molecular Dynamics, The Hebrew University of Jerusalem, Israel, and Department of Physical Chemistry and the Farkas Center for Light Induced Processes, The Hebrew University of Jerusalem, Israel
| | - M. Baer
- Institut für Chemie und Biochemie, Freie Universität Berlin, Germany, Faculty of Pharmacy, Al-Quds University, Palestine, The Fritz Haber Center for Molecular Dynamics, The Hebrew University of Jerusalem, Israel, and Department of Physical Chemistry and the Farkas Center for Light Induced Processes, The Hebrew University of Jerusalem, Israel
| | - O. Deeb
- Institut für Chemie und Biochemie, Freie Universität Berlin, Germany, Faculty of Pharmacy, Al-Quds University, Palestine, The Fritz Haber Center for Molecular Dynamics, The Hebrew University of Jerusalem, Israel, and Department of Physical Chemistry and the Farkas Center for Light Induced Processes, The Hebrew University of Jerusalem, Israel
| | - M. Leibscher
- Institut für Chemie und Biochemie, Freie Universität Berlin, Germany, Faculty of Pharmacy, Al-Quds University, Palestine, The Fritz Haber Center for Molecular Dynamics, The Hebrew University of Jerusalem, Israel, and Department of Physical Chemistry and the Farkas Center for Light Induced Processes, The Hebrew University of Jerusalem, Israel
| | - J. Manz
- Institut für Chemie und Biochemie, Freie Universität Berlin, Germany, Faculty of Pharmacy, Al-Quds University, Palestine, The Fritz Haber Center for Molecular Dynamics, The Hebrew University of Jerusalem, Israel, and Department of Physical Chemistry and the Farkas Center for Light Induced Processes, The Hebrew University of Jerusalem, Israel
| | - X. Xu
- Institut für Chemie und Biochemie, Freie Universität Berlin, Germany, Faculty of Pharmacy, Al-Quds University, Palestine, The Fritz Haber Center for Molecular Dynamics, The Hebrew University of Jerusalem, Israel, and Department of Physical Chemistry and the Farkas Center for Light Induced Processes, The Hebrew University of Jerusalem, Israel
| | - S. Zilberg
- Institut für Chemie und Biochemie, Freie Universität Berlin, Germany, Faculty of Pharmacy, Al-Quds University, Palestine, The Fritz Haber Center for Molecular Dynamics, The Hebrew University of Jerusalem, Israel, and Department of Physical Chemistry and the Farkas Center for Light Induced Processes, The Hebrew University of Jerusalem, Israel
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Dick B. Gradient Projection Method for Constraint Optimization and Relaxed Energy Paths on Conical Intersection Spaces and Potential Energy Surfaces. J Chem Theory Comput 2008; 5:116-25. [DOI: 10.1021/ct8003029] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bernhard Dick
- Institut für Physikalische and Theoretische Chemie, Universität Regensburg, D 93040 Regensburg, Germany
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Zilberg S, Cogan S, Haas Y, Deeb O, González L. Conical intersections in the photoisomerization and photodissociation of a chiral fluoroethylene derivative ((4-methylcyclohexylidene) fluoromethane). Chem Phys Lett 2007. [DOI: 10.1016/j.cplett.2007.06.072] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Zilberg S, Haas Y. Isomerization around a CN double bond and a CC double bond with a nitrogen atom attached: thermal and photochemical routes. Photochem Photobiol Sci 2003; 2:1256-63. [PMID: 14717219 DOI: 10.1039/b306137j] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Longuet-Higgins phase change theorem is used to show that, in certain photochemical reactions, a single product is formed via a conical intersection. The cis-trans isomerization around the double bond in the formaldiminium cation and vinylamine are shown to be possible examples. This situation is expected to hold when the reactant can be converted to the product via two distinct elementary ground-state reactions that differ in their phase characteristics. In one, the total electronic wavefunction preserves its phase in the reaction; in the other, the phase is inverted. Under these conditions, a conical intersection necessarily connects the first electronic excited state to the ground state, leading to rapid photochemical isomerization following optical excitation. Detailed quantum chemical calculations support the proposed model. The possibility that a similar mechanism is operative in other systems, among them the rapid photo-induced cis-trans isomerization of longer protonated Schiff bases (the parent chromophores of rhodopsins), is discussed.
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Affiliation(s)
- Shmuel Zilberg
- Department of Physical Chemistry, Farkas Center for Light Induced Processes, The Hebrew University of Jerusalem, Givat Ram, Jerusalem 91904, Israel
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