Ultrafast charge transfer dynamics in supramolecular Pt(<scp>ii</scp>) donor–bridge–acceptor assemblies: the effect of vibronic coupling

Scattergood, Paul A.; Delor, Milan; Sazanovich, Igor V.; Towrie, Michael; Weinstein, Julia A.

doi:10.1039/c5fd00103j

Cited by 13 publications

(13 citation statements)

References 63 publications

(100 reference statements)

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“…This relates to the effects of CN vibrational excitation on the ET observed in molecular assemblies in the work of Khalil and co-workers 171 and Weinstein and co-workers 172 …”

Section: Intramolecular Charge Transfermentioning

confidence: 96%

Charge migration and charge transfer in molecular systems

Wörner

Arrell

Banerji

et al. 2017

Structural Dynamics

184

163

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The transfer of charge at the molecular level plays a fundamental role in many areas of chemistry, physics, biology and materials science. Today, more than 60 years after the seminal work of R. A. Marcus, charge transfer is still a very active field of research. An important recent impetus comes from the ability to resolve ever faster temporal events, down to the attosecond time scale. Such a high temporal resolution now offers the possibility to unravel the most elementary quantum dynamics of both electrons and nuclei that participate in the complex process of charge transfer. This review covers recent research that addresses the following questions. Can we reconstruct the migration of charge across a molecule on the atomic length and electronic time scales? Can we use strong laser fields to control charge migration? Can we temporally resolve and understand intramolecular charge transfer in dissociative ionization of small molecules, in transition-metal complexes and in conjugated polymers? Can we tailor molecular systems towards specific charge-transfer processes? What are the time scales of the elementary steps of charge transfer in liquids and nanoparticles? Important new insights into each of these topics, obtained from state-of-the-art ultrafast spectroscopy and/or theoretical methods, are summarized in this review.

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“…This relates to the effects of CN vibrational excitation on the ET observed in molecular assemblies in the work of Khalil and co-workers 171 and Weinstein and co-workers 172 …”

Section: Intramolecular Charge Transfermentioning

confidence: 96%

Charge migration and charge transfer in molecular systems

Wörner

Arrell

Banerji

et al. 2017

Structural Dynamics

184

163

View full text Add to dashboard Cite

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“…[114] This is a fascinating area, yet much room is left for further study, for instance, it was shown that changing the electron acceptor to NDI make the IR excitation tunable CS in DBA vanishes. [117] The authors proposed a few requirements for the IR control in DBA systems, (i) a gateway state, e.g., a CT state, which branches over several pathways; (ii) the branching should occur on timescales comparable to vibrational relaxation along the ET reaction coordinate (too long lifetime of the CT state will make the IR tunability vanish); (iii) the difference in energy between the gateway state and the nearest lower excited state should be of the order of vibrational energies, up to 0.3-0.4 eV (larger energy gap will likely make the IR tunability disappear). [117] The IR excitation perturbed ET can be also studied with the UV-IR-Vis three pulse experiments, i.e.…”

Section: Vibration Control Of the Electron Transfermentioning

confidence: 99%

Recent Developments on Understanding Charge Transfer in Molecular Electron Donor‐Acceptor Systems

et al. 2023

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Charge transfer (CT) in molecular electron donor-acceptor systems is pivotal for artificial photosynthesis, photocatalysis, photovoltaics and fundamental photochemistry. We summarized the recent development in study of CT and discussed its application in thermally activated delayed fluorescence (TADF) emitters. The direct experimental proof of the spin multiplicity of the charge separated (CS) state with pulsed laser excited time-resolved electron paramagnetic resonance (TREPR) spectroscopy was discussed. Experimental determination of the electron exchange energy (J) of the CS state, with magnetic field effect on its yield or lifetime was introduced. The electron spin transfer accompanying the CT, studied with pulsed EPR spectra was briefly discussed. Tuning of the CT yield and kinetics with selective vibration excitation of the linker (the bridge) with IR pulse was presented. Above all, these studies show that there are more fun than simply monitoring the formation of the cations and anions and the kinetics or CS yields in this area.

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“…The bridge between them mediates the ultrafast ET. This system is characteristic of the wide class of synthetic and natural photocatalysts, for which studies by various methods have barely started: a combination of a UV and IR pump aimed at vibrational control of ET and an IR probe, 17,220 2D electronic spectroscopy, 221 and 2DEV. 171,173 Canton and co-workers could thus detect the dynamics of electron departure from the donor, the transit time via the bridge, the arrival to the acceptor, and, nally, the formation time of the high spin state in the latter (Fig.…”

Section: (A) Electron Versus Excitation Energy Transfer In Proteinsmentioning

confidence: 99%

“…with special emphasis on articial photosynthesis. [15][16][17][18][19][20] These assemblies are common in biology and the most obvious example is DNA.…”

Section: Introductionmentioning

confidence: 99%