EFFECT OF THE ELECTROMAGNETIC FIELD ON THE PHOTOISOMERIZATION OF THE RHODOPSIN MOLECULE.
Molecular photoisomerization is a process of configurational rearrangement induced by the action of electromagnetic radiation and whose efficiency can be controlled via the manipulation of the electric field that triggers the reaction. In the present work, we introduce a theoretical model for the is...
| Publicado en: | Revista Cubana de Física Vol. 34; no. 2; pp. 136 - 140 |
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| Autores principales: | , , , |
| Formato: | Artículo |
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Universidad de La Habana
dic2017
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| Materias: | |
| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=lth&AN=133743943&site=ehost-live header: @attributes: shortDbName: lth uiTerm: 133743943 longDbName: MedicLatina uiTag: AN controlInfo: bkinfo: jinfo: jid: 02539268 UEW jtl: Revista Cubana de Física issn: 02539268 maglogo: N pubinfo: dt: dic2017 vid: 34 iid: 2 pid: 21208 pub: Universidad de La Habana artinfo: ui: 133743943 ppf: 136 ppct: 4 formats: fmt: @attributes: type: P size: 813KB tig: atl: EFFECT OF THE ELECTROMAGNETIC FIELD ON THE PHOTOISOMERIZATION OF THE RHODOPSIN MOLECULE. aug: au: CERUTTI-TORRES, J. RODRÍGUEZ-HERNÁNDEZ, F. MARTÍNEZ-MESA, A. URANGA-PIÑA, L. affil: DynAMoS (Dynamical processes in Atomic and Molecular Systems), Facultad de Física, Universidad de La Habana, San Lázaro y L, La Habana 10400, Cuba su: Rhodopsin Photoisomerization Electromagnetic fields Atomic physics Isomerization Femtochemistry Molecular dynamics sug: subj: Rhodopsin Photoisomerization Electromagnetic fields Atomic physics Isomerization Femtochemistry Molecular dynamics ab: Molecular photoisomerization is a process of configurational rearrangement induced by the action of electromagnetic radiation and whose efficiency can be controlled via the manipulation of the electric field that triggers the reaction. In the present work, we introduce a theoretical model for the isomerization process that incorporates the essential features of this phenomenon at the microscopic level. Two potential energy surfaces and two degrees of freedom are used to represent the active center of the molecule. The effect of the electric field on the overall dynamics is studied by considering different widths and shapes of the exciting field, within the electric dipole approximation. The rest of the system is modeled as a set of classical harmonic oscillators. The model reproduces previously reported experimental results on the isomerization yield upon instantaneous excitation and it predicts the behavior of the system under the action of laser pulses of finite duration. La fotoisomerización molecular es un proceso de reordenamiento de configuración inducido por la acción de radiación electromagnética y cuya eficiencia puede controlarse mediante la manipulación del campo eléctrico que desencadena la reacción. En el presente trabajo se introduce un modelo teórico del proceso de isomerización que incorpora las características esenciales del fenómeno a nivel microscópico. Se utilizan dos estados electrónicos y dos modos nucleares para representar el centro activo de la molécula. El efecto del campo eléctrico sobre la dinámica se estudia a partir de la consideración de pulsos de diferentes formas y anchos temporales, dentro de la aproximación dipolar eléctrica. El resto de la molécula se modela como un conjunto de osciladores armónicos clásicos. El modelo reproduce resultados experimentales reportados previamente para la probabilidad de isomerización de la molécula rodopsina ante una excitación instantánea y predice el comportamiento del sistema bajo la acción de pulsos láser de duración finita. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: Y custom: Copyright of Revista Cubana de Física is the property of Universidad de La Habana and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. item: Revista Cubana de Física holder: Universidad de La Habana dt: @attributes: year: 2017 holdings: @attributes: islocal: N |
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