Excited states of the high-frequency vibrational modes and kinetics of ultrafast photoinduced electron transfer

Barykov, Vadim Yu; Ivanov, Anatoly I.

doi:10.1134/s0036024416020060

Cited by 6 publications

(14 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Such an effect can be described in terms of the stochastic multichannel point‐transition model . The simplest model supposing a single high‐frequency mode is active at both excitation, and charge transfer stages were elaborated . Simulations of the effect of excitation of a single high‐frequency vibration mode on the ultrafast charge transfer kinetics are in qualitative agreement with the experimental data .…”

Section: Introductionmentioning

confidence: 70%

“…The study of the ultrafast electron transfer kinetics from nonequilibrium states attracts growing interest . The term ultrafast electron transfer is typically used to refer to reactions proceeding on timescale and, hence in parallel with, relaxation of the nuclear subsystem of the reactants and the surrounding medium .…”

Section: Introductionmentioning

confidence: 99%

“…Obviously, the kinetics of nonequilibrium reactions is rather complex and cannot be described in terms of a single rate constant . The nonequilibrium manifests not only in nonexponential kinetics but also in a dependence of the kinetics on the pump pulse carrier frequency .…”

Section: Introductionmentioning

confidence: 99%

“…There are a number of experimental investigations showing the effect of excitation of high‐frequency vibrations on the charge transfer kinetics . Such an effect can be described in terms of the stochastic multichannel point‐transition model . The simplest model supposing a single high‐frequency mode is active at both excitation, and charge transfer stages were elaborated .…”

Section: Introductionmentioning

confidence: 99%

“…In previous publications , the influence of excitation of a high‐frequency vibrational mode excitation was investigated with the supposition that only single vibrational mode is active at both the excitation and charge transfer stages. The novelty of this work is the development of a more realistic model of photoinduced charge transfer involving the reorganization of several vibrational modes at each stage of the photoreaction.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Excitation Frequency Dependence of Ultrafast Photoinduced Charge Transfer Dynamics

Nazarov

Ivanov

2017

Int. J. Chem. Kinet.

View full text Add to dashboard Cite

The dependence of the photoinduced charge transfer rate constant on the pump pulse carrier frequency is shown to be strong, and it is considerably affected by the value of the reorganization energy of low-frequency modes at the stage of excitation. In the area of small values of the reorganization energy, the dependence of the charge transfer rate constant on the pump pulse carrier frequency is strongly nonmonotonic that is caused by vibrational resonances and variation of the initial position of the wave packet on the term of the locally excited state. Increasing the reorganization energy smoothes the dependence. The smoothing is caused by the broadening of the vibrational resonances and their overlapping. The highfrequency vibrational mode excitation typically accelerates the charge transfer in both areas of high and low exergonicity and decelerates it in the vicinity of the Marcus barrierless region.

show abstract

Section: Introductionmentioning

confidence: 70%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Excitation Frequency Dependence of Ultrafast Photoinduced Charge Transfer Dynamics

Nazarov

Ivanov

2017

Int. J. Chem. Kinet.

View full text Add to dashboard Cite

show abstract

Non-equilibrium effects in ultrafast photoinduced charge transfer kinetics

Feskov

Михайлова

Ivanov

2016

Journal of Photochemistry and Photobiology C: Photochemistry Re

View full text Add to dashboard Cite

Effect of Intramolecular High-Frequency Vibrational Mode Excitation on Ultrafast Photoinduced Charge Transfer and Charge Recombination Kinetics

2016

View full text Add to dashboard Cite

A model of photoinduced ultrafast charge separation and ensuing charge recombination into the ground state has been developed. The model includes explicit description of the formation and evolution of nonequilibrium state of both the intramolecular vibrations and the surrounding medium. An effect of the high-frequency intramolecular vibrational mode excitation by a pumping pulse on ultrafast charge separation and charge recombination kinetics has been investigated. Simulations, in accord with experiment, have shown that the effect may be both positive (the vibrational mode excitation increases the charge-transfer rate constant) and negative (opposite trend). The effect on charge separation kinetics is predicted to be bigger than that on the charge recombination rate but nevertheless the last is large enough to be observable. The amplitude of both effects falls with decreasing vibrational relaxation time constant, but the effects are expected to be observable up to the time constants as short as 200 fs. Physical interpretation of the effects has been presented. Comparisons with the experimental data have shown that the simulations, in whole, provide results close to that obtained in the experiment. The reasons of the deviations have been discussed.

show abstract

Excited states of the high-frequency vibrational modes and kinetics of ultrafast photoinduced electron transfer

Cited by 6 publications

References 30 publications

Excitation Frequency Dependence of Ultrafast Photoinduced Charge Transfer Dynamics

Excitation Frequency Dependence of Ultrafast Photoinduced Charge Transfer Dynamics

Non-equilibrium effects in ultrafast photoinduced charge transfer kinetics

Effect of Intramolecular High-Frequency Vibrational Mode Excitation on Ultrafast Photoinduced Charge Transfer and Charge Recombination Kinetics

Contact Info

Product

Resources

About