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Salt Effect in Ion-Pair Dynamics after Bimolecular Photoinduced Electron Transfer in a Room-Temperature Ionic Liquid

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Salt Effect in Ion-Pair Dynamics after Bimolecular Photoinduced Electron Transfer in a Room-Temperature Ionic Liquid. / Rosspeintner, Arnulf; Koch, Marius; Angulo, Gonzalo; Vauthey, Eric.

in: J PHYS CHEM LETT, Jahrgang 9, Nr. 24, 20.12.2018, S. 7015-7020.

Publikationen: SCORING: Beitrag in Fachzeitschrift/Zeitung › SCORING: Zeitschriftenaufsatz › Forschung › Begutachtung

Harvard

Rosspeintner, A, Koch, M, Angulo, G & Vauthey, E 2018, 'Salt Effect in Ion-Pair Dynamics after Bimolecular Photoinduced Electron Transfer in a Room-Temperature Ionic Liquid', J PHYS CHEM LETT, Jg. 9, Nr. 24, S. 7015-7020. https://doi.org/10.1021/acs.jpclett.8b03030

APA

Rosspeintner, A., Koch, M., Angulo, G., & Vauthey, E. (2018). Salt Effect in Ion-Pair Dynamics after Bimolecular Photoinduced Electron Transfer in a Room-Temperature Ionic Liquid. J PHYS CHEM LETT, 9(24), 7015-7020. https://doi.org/10.1021/acs.jpclett.8b03030

Vancouver

Rosspeintner A, Koch M, Angulo G, Vauthey E. Salt Effect in Ion-Pair Dynamics after Bimolecular Photoinduced Electron Transfer in a Room-Temperature Ionic Liquid. J PHYS CHEM LETT. 2018 Dez 20;9(24):7015-7020. https://doi.org/10.1021/acs.jpclett.8b03030

Bibtex

@article{83425fc6763d41eb9ab6f5cf9d642e33,
title = "Salt Effect in Ion-Pair Dynamics after Bimolecular Photoinduced Electron Transfer in a Room-Temperature Ionic Liquid",
abstract = "Bimolecular photoinduced electron transfer between perylene and two quenchers was investigated in an imidazolium room-temperature ionic liquid (RTIL) and in a dipolar solvent mixture of the same viscosity using transient absorption on the subpicosecond to submicrosecond time scales. Whereas charge separation dynamics were similar in both solvents, significant differences were observed in the temporal evolution of the ensuing radical ions: although small, the free-ion yield is significantly larger in the RTIL, and recombination of the ion pair to the triplet state of perylene is more efficient in the dipolar solvent. The temporal evolution of reactant, ion, and triplet state populations could be well reproduced using unified encounter theory. This analysis reveals that the observed differences can be explained by the strong screening of the Coulomb potential in the ion pair by the ionic solvent. In essence, RTILs favor free ions compared to highly dipolar solvents of the same viscosity.",
author = "Arnulf Rosspeintner and Marius Koch and Gonzalo Angulo and Eric Vauthey",
year = "2018",
month = dec,
day = "20",
doi = "10.1021/acs.jpclett.8b03030",
language = "English",
volume = "9",
pages = "7015--7020",
journal = "J PHYS CHEM LETT",
issn = "1948-7185",
publisher = "American Chemical Society",
number = "24",

}

RIS

TY - JOUR

T1 - Salt Effect in Ion-Pair Dynamics after Bimolecular Photoinduced Electron Transfer in a Room-Temperature Ionic Liquid

AU - Rosspeintner, Arnulf

AU - Koch, Marius

AU - Angulo, Gonzalo

AU - Vauthey, Eric

PY - 2018/12/20

Y1 - 2018/12/20

N2 - Bimolecular photoinduced electron transfer between perylene and two quenchers was investigated in an imidazolium room-temperature ionic liquid (RTIL) and in a dipolar solvent mixture of the same viscosity using transient absorption on the subpicosecond to submicrosecond time scales. Whereas charge separation dynamics were similar in both solvents, significant differences were observed in the temporal evolution of the ensuing radical ions: although small, the free-ion yield is significantly larger in the RTIL, and recombination of the ion pair to the triplet state of perylene is more efficient in the dipolar solvent. The temporal evolution of reactant, ion, and triplet state populations could be well reproduced using unified encounter theory. This analysis reveals that the observed differences can be explained by the strong screening of the Coulomb potential in the ion pair by the ionic solvent. In essence, RTILs favor free ions compared to highly dipolar solvents of the same viscosity.

AB - Bimolecular photoinduced electron transfer between perylene and two quenchers was investigated in an imidazolium room-temperature ionic liquid (RTIL) and in a dipolar solvent mixture of the same viscosity using transient absorption on the subpicosecond to submicrosecond time scales. Whereas charge separation dynamics were similar in both solvents, significant differences were observed in the temporal evolution of the ensuing radical ions: although small, the free-ion yield is significantly larger in the RTIL, and recombination of the ion pair to the triplet state of perylene is more efficient in the dipolar solvent. The temporal evolution of reactant, ion, and triplet state populations could be well reproduced using unified encounter theory. This analysis reveals that the observed differences can be explained by the strong screening of the Coulomb potential in the ion pair by the ionic solvent. In essence, RTILs favor free ions compared to highly dipolar solvents of the same viscosity.

U2 - 10.1021/acs.jpclett.8b03030

DO - 10.1021/acs.jpclett.8b03030

M3 - SCORING: Journal article

C2 - 30484661

VL - 9

SP - 7015

EP - 7020

JO - J PHYS CHEM LETT

JF - J PHYS CHEM LETT

SN - 1948-7185

IS - 24

ER -