Isotopic effect and temperature dependent intramolecular excitation energy transfer in a model donor–acceptor dyad

Literature Information

Publication Date 2010-06-11
DOI 10.1039/C003113E
Impact Factor 3.676
Authors

Jaykrishna Singh, Eric R. Bittner


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Abstract

We consider here the non-adiabatic energy transfer dynamics for a model bi-chromophore system consisting of a perylenemonoimide unit linked to a ladder-type poly(para-phenylene) oligomer. Starting from a semi-empirical parameterization of a model electron/phonon Hamiltonian, we compute the golden-rule rate for energy transfer from the LPPP5 donor to the PMI acceptor. Our results indicate that the non-adiabatic transfer is promoted by the out-of-plane wagging modes of the C–H bonds even though theses modes give little or no contribution to the Franck–Condon factors in this system. We also predict a kinetic isotope effect of k(H)/k(D) = 1.7–2.5 depending upon the temperature.

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Source Journal

Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
Articles per Year: 3036

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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