Intramolecular electron transfer within a covalent, fixed-distance donor-acceptor molecule in an ionic liquid

Jenny V. Lockard; Michael R Wasielewski

doi:10.1021/jp075567h

Intramolecular electron transfer within a covalent, fixed-distance donor-acceptor molecule in an ionic liquid

Jenny V. Lockard, Michael R Wasielewski^*

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article › peer-review

31 Scopus citations

Abstract

Intramolecular photoinduced charge separation and recombination within the donor-acceptor molecule 4-(Afpyrrolidino)naphthalene-1,8-imide-pyromellitimide, 5ANI-PI, are studied using ultrafast transient absorption spectroscopy in the room-temperature ionic liquid, 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)amide [EMIM][Tf₂N]. The rate constants of both photoinduced charge separation and charge recombination for 5ANI-PI in [EMIM][Tf₂N] are comparable to those observed in pyridine, which has a static dielectric constant similar to that of [EMIM][Tf2N] but a viscosity that is nearly 2 orders of magnitude lower than that of [EMIM][Tf₂N]. The electron-transfer dynamics of 5ANI-PI in [EMIM][Tf₂N] are compared to those in pyridine as a function of temperature and are discussed in the context of recently reported ionic liquid solvation studies.

Original language	English (US)
Pages (from-to)	11638-11641
Number of pages	4
Journal	Journal of Physical Chemistry B
Volume	111
Issue number	40
DOIs	https://doi.org/10.1021/jp075567h
State	Published - Oct 11 2007

ASJC Scopus subject areas

Surfaces, Coatings and Films
Physical and Theoretical Chemistry
Materials Chemistry

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title = "Intramolecular electron transfer within a covalent, fixed-distance donor-acceptor molecule in an ionic liquid",

abstract = "Intramolecular photoinduced charge separation and recombination within the donor-acceptor molecule 4-(Afpyrrolidino)naphthalene-1,8-imide-pyromellitimide, 5ANI-PI, are studied using ultrafast transient absorption spectroscopy in the room-temperature ionic liquid, 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)amide [EMIM][Tf2N]. The rate constants of both photoinduced charge separation and charge recombination for 5ANI-PI in [EMIM][Tf2N] are comparable to those observed in pyridine, which has a static dielectric constant similar to that of [EMIM][Tf2N] but a viscosity that is nearly 2 orders of magnitude lower than that of [EMIM][Tf2N]. The electron-transfer dynamics of 5ANI-PI in [EMIM][Tf2N] are compared to those in pyridine as a function of temperature and are discussed in the context of recently reported ionic liquid solvation studies.",

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doi = "10.1021/jp075567h",

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T1 - Intramolecular electron transfer within a covalent, fixed-distance donor-acceptor molecule in an ionic liquid

AU - Lockard, Jenny V.

AU - Wasielewski, Michael R

PY - 2007/10/11

Y1 - 2007/10/11

N2 - Intramolecular photoinduced charge separation and recombination within the donor-acceptor molecule 4-(Afpyrrolidino)naphthalene-1,8-imide-pyromellitimide, 5ANI-PI, are studied using ultrafast transient absorption spectroscopy in the room-temperature ionic liquid, 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)amide [EMIM][Tf2N]. The rate constants of both photoinduced charge separation and charge recombination for 5ANI-PI in [EMIM][Tf2N] are comparable to those observed in pyridine, which has a static dielectric constant similar to that of [EMIM][Tf2N] but a viscosity that is nearly 2 orders of magnitude lower than that of [EMIM][Tf2N]. The electron-transfer dynamics of 5ANI-PI in [EMIM][Tf2N] are compared to those in pyridine as a function of temperature and are discussed in the context of recently reported ionic liquid solvation studies.

AB - Intramolecular photoinduced charge separation and recombination within the donor-acceptor molecule 4-(Afpyrrolidino)naphthalene-1,8-imide-pyromellitimide, 5ANI-PI, are studied using ultrafast transient absorption spectroscopy in the room-temperature ionic liquid, 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)amide [EMIM][Tf2N]. The rate constants of both photoinduced charge separation and charge recombination for 5ANI-PI in [EMIM][Tf2N] are comparable to those observed in pyridine, which has a static dielectric constant similar to that of [EMIM][Tf2N] but a viscosity that is nearly 2 orders of magnitude lower than that of [EMIM][Tf2N]. The electron-transfer dynamics of 5ANI-PI in [EMIM][Tf2N] are compared to those in pyridine as a function of temperature and are discussed in the context of recently reported ionic liquid solvation studies.

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Intramolecular electron transfer within a covalent, fixed-distance donor-acceptor molecule in an ionic liquid

Abstract

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