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Title: Photoexcited energy transfer in a weakly coupled dimer

Journal Article · · Journal of Physical Chemistry. B, Condensed Matter, Materials, Surfaces, Interfaces and Biophysical Chemistry
DOI:https://doi.org/10.1021/jp510557f· OSTI ID:1227902
 [1];  [2];  [2];  [1]
  1. Univ. Nacional de Quilmes, Bernal (Argentina)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Nonadiabatic excited-state molecular dynamics (NA-ESMD) simulations have been performed in order to study the time-dependent exciton localization during energy transfer between two chromophore units of the weakly coupled anthracene dimer dithia-anthracenophane (DTA). Simulations are done at both low temperature (10 K) and room temperature (300 K). The initial photoexcitation creates an exciton which is primarily localized on a single monomer unit. Subsequently, the exciton experiences an ultrafast energy transfer becoming localized on either one monomer unit or the other, whereas delocalization between both monomers never occurs. In half of the trajectories, the electronic transition density becomes completely localized on the same monomer as the initial excitation, while in the other half, it becomes completely localized on the opposite monomer. In this article, we present an analysis of the energy transfer dynamics and the effect of thermally induced geometry distortions on the exciton localization. Finally, simulated fluorescence anisotropy decay curves for both DTA and the monomer unit dimethyl anthracene (DMA) are compared. As a result, our analysis reveals that changes in the transition density localization caused by energy transfer between two monomers in DTA is not the only source of depolarization and exciton relaxation within a single DTA monomer unit can also cause reorientation of the transition dipole.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
PICT-2010-2375; AC52-06NA25396
OSTI ID:
1227902
Report Number(s):
LA-UR-14-28224
Journal Information:
Journal of Physical Chemistry. B, Condensed Matter, Materials, Surfaces, Interfaces and Biophysical Chemistry, Vol. 119, Issue 24; ISSN 1520-6106
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 22 works
Citation information provided by
Web of Science

References (51)

Stimulated emission due to localized and delocalized carriers in Al 0.35 Ga 0.65 N/Al 0.49 Ga 0.51 N quantum wells journal July 2012
Localized versus delocalized states: Photoluminescence from electrochemically synthesized ZnO nanowires journal September 2009
Voltage-dependent conductance of a single graphene nanoribbon journal October 2012
Charge separation in localized and delocalized electronic states in polymeric semiconductors journal April 1998
Controlling Interchain Interactions in Conjugated Polymers:  The Effects of Chain Morphology on Exciton−Exciton Annihilation and Aggregation in MEH−PPV Films journal January 2000
Understanding the Origin of the 535 nm Emission Band in Oxidized Poly(9,9-dioctylfluorene): The Essential Role of Inter-Chain/Inter-Segment Interactions journal August 2004
Fluctuating exciton localization in giant π-conjugated spoked-wheel macrocycles journal September 2013
Shishiodoshi unidirectional energy transfer mechanism in phenylene ethynylene dendrimers journal December 2012
Energy Transfer in the Nanostar:  The Role of Coulombic Coupling and Dynamics journal June 2005
Nonadiabatic Molecular Dynamics Simulations of the Energy Transfer between Building Blocks in a Phenylene Ethynylene Dendrimer journal July 2009
Thermally-Limited Exciton Delocalization in Superradiant Molecular Aggregates journal November 2012
Effects of (Multi)branching of Dipolar Chromophores on Photophysical Properties and Two-Photon Absorption journal April 2005
Enhanced Two‐Photon Absorption of Organic Chromophores: Theoretical and Experimental Assessments journal December 2008
Excited State Localization and Delocalization of Internal Charge Transfer in Branched Push−Pull Chromophores Studied by Single-Molecule Spectroscopy journal April 2009
Oscillatory Excitation Transfer in Dithiaanthracenophane: Quantum Beat in a Coherent Photochemical Process in Solution journal March 2002
The real‐time intramolecular electronic excitation transfer dynamics of 9’,9‐bifluorene and 2’,2‐binaphthyl in solution journal January 1993
Coherent Control of Oscillatory Excitation Transfer in Dithia-1,5[3,3]anthracenophane by a Phase-Locked Femtosecond Pulse Pair journal November 2003
Intermolecular interaction-induced quantum beats in femtosecond time-resolved light scattering from molecules: photon-polarization and inhomogeneous effects journal January 1996
Theoretical Investigation of the Mechanism and Dynamics of Intramolecular Coherent Resonance Energy Transfer in Soft Molecules: A Case Study of Dithia-anthracenophane journal December 2010
Two-Dimensional Real-Space Analysis of Optical Excitations in Acceptor-Substituted Carotenoids journal November 1997
Collective electronic oscillators for nonlinear optical response of conjugated molecules journal August 1996
Optimization of parameters for semiempirical methods I. Method journal March 1989
Optimization of parameters for semiempirical methods II. Applications journal March 1989
Configuration interaction singles, time-dependent Hartree–Fock, and time-dependent density functional theory for the electronic excited states of extended systems journal December 1999
Stilbenoid Dimers:  Dissection of a Paracyclophane Chromophore journal September 1998
Excited electronic states of carotenoids: Time-dependent density-matrix-response algorithm journal January 1998
Chemical Bonding and Size Scaling of Nonlinear Polarizabilities of Conjugated Polymers journal November 1996
Localized Electronic Excitations in Phenylacetylene Dendrimers journal April 1998
Single-Reference ab Initio Methods for the Calculation of Excited States of Large Molecules journal November 2005
Molecular dynamics with electronic transitions journal July 1990
Proton transfer in solution: Molecular dynamics with quantum transitions journal September 1994
Constant temperature simulations using the Langevin equation with velocity Verlet integration journal September 1998
Statistical mechanical theory for non-equilibrium systems. IX. Stochastic molecular dynamics journal May 2009
Representation independent algorithms for molecular response calculations in time-dependent self-consistent field theories journal February 2009
Recursive density‐matrix‐spectral‐moment algorithm for molecular nonlinear polarizabilities journal November 1996
Adiabatic time-dependent density functional methods for excited state properties journal October 2002
Nonadiabatic Excited-State Molecular Dynamics Modeling of Photoinduced Dynamics in Conjugated Molecules journal May 2011
First-order nonadiabatic couplings from time-dependent hybrid density functional response theory: Consistent formalism, implementation, and performance journal January 2010
Nonadiabatic coupling vectors for excited states within time-dependent density functional theory in the Tamm–Dancoff approximation and beyond journal November 2010
Nonadiabatic excited-state molecular dynamics: Numerical tests of convergence and parameters journal February 2012
Identification of unavoided crossings in nonadiabatic photoexcited dynamics involving multiple electronic states in polyatomic conjugated molecules journal July 2012
Artifacts due to trivial unavoided crossings in the modeling of photoinduced energy transfer dynamics in extended conjugated molecules journal December 2013
Nonadiabatic excited-state molecular dynamics: Treatment of electronic decoherence journal June 2013
Nonadiabatic Excited-State Molecular Dynamics: Modeling Photophysics in Organic Conjugated Materials journal February 2014
Density Matrix Analysis and Simulation of Electronic Excitations in Conjugated and Aggregated Molecules journal September 2002
Multiscale Modeling of Electronic Excitations in Branched Conjugated Molecules Using an Exciton Scattering Approach journal February 2008
Charge-Transfer Excitations Steer the Davydov Splitting and Mediate Singlet Exciton Fission in Pentacene journal May 2013
On the Singlet‐Exciton States of Crystalline Anthracene journal March 1965
Temperature Dependence of the Davydov Splitting in Anthracene journal January 1970
Theory of fluorescence depolarization in macromolecules and membranes journal July 1984
Principles of Fluorescence Spectroscopy book January 2006

Cited By (3)

Coherent exciton-vibrational dynamics and energy transfer in conjugated organics journal June 2018
Carbon nanorings with inserted acenes: breaking symmetry in excited state dynamics journal August 2016
Exciton localization in excited-state dynamics of a tetracene trimer: a surface hopping LC-TDDFTB study journal January 2018

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