Excitation dynamics and relaxation in a molecular heterodimer

Kód výsledku v IS VaVaI

RIV/00216208:11320/12:10129556 - isvavai.cz

Výsledek na webu

http://dx.doi.org/10.1016/j.chemphys.2012.02.021

DOI - Digital Object Identifier

10.1016/j.chemphys.2012.02.021

Jazyk výsledku

angličtina

Název v původním jazyce

Excitation dynamics and relaxation in a molecular heterodimer

Popis výsledku v původním jazyce

The exciton dynamics in a molecular heterodimer is studied as a function of differences in excitation and reorganization energies, asymmetry in transition dipole moments and excited state lifetimes. The heterodimer is composed of two molecules modeled astwo-level systems coupled by the resonance interaction. The system-bath coupling is taken into account as a modulating factor of the molecular excitation energy gap, while the relaxation to the ground state is treated phenomenologically. Comparison of the description of the excitation dynamics modeled using either the Redfield equations (secular and full forms) or the Hierarchical quantum master equation (HQME) is demonstrated and discussed. Possible role of the dimer as an excitation quenching centerin photosynthesis self-regulation is discussed. It is concluded that the system-bath interaction rather than the excitonic effect determines the excitation quenching ability of such a dimer. (C) 2012 Elsevier B.V. All rights reserved.

Název v anglickém jazyce

Excitation dynamics and relaxation in a molecular heterodimer

Popis výsledku anglicky

The exciton dynamics in a molecular heterodimer is studied as a function of differences in excitation and reorganization energies, asymmetry in transition dipole moments and excited state lifetimes. The heterodimer is composed of two molecules modeled astwo-level systems coupled by the resonance interaction. The system-bath coupling is taken into account as a modulating factor of the molecular excitation energy gap, while the relaxation to the ground state is treated phenomenologically. Comparison of the description of the excitation dynamics modeled using either the Redfield equations (secular and full forms) or the Hierarchical quantum master equation (HQME) is demonstrated and discussed. Possible role of the dimer as an excitation quenching centerin photosynthesis self-regulation is discussed. It is concluded that the system-bath interaction rather than the excitonic effect determines the excitation quenching ability of such a dimer. (C) 2012 Elsevier B.V. All rights reserved.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BE - Teoretická fyzika

OECD FORD obor

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Projekt

ME 899: Teorie přenosu energie a náboje v přírodních a umělých systémech pro sběr světelné energie a jejich zkoumání spektroskopickými metodami

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2012

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Chemical Physics

ISSN

0301-0104

e-ISSN

—

Svazek periodika

2012

Číslo periodika v rámci svazku

404

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

9

Strana od-do

94-102

Kód UT WoS článku

000308087500017

EID výsledku v databázi Scopus

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