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

Jenny V. Lockard, Michael R Wasielewski

Research output: Contribution to journalArticle

28 Citations (Scopus)

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 languageEnglish
Pages (from-to)11638-11641
Number of pages4
JournalJournal of Physical Chemistry B
Volume111
Issue number40
DOIs
Publication statusPublished - Oct 11 2007

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Ionic Liquids
polarization (charge separation)
Ionic liquids
Pyridine
pyridines
electron transfer
Imides
Molecules
Electrons
imides
Solvation
Naphthalene
liquids
Absorption spectroscopy
Amides
naphthalene
amides
solvation
molecules
Rate constants

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Intramolecular electron transfer within a covalent, fixed-distance donor-acceptor molecule in an ionic liquid. / Lockard, Jenny V.; Wasielewski, Michael R.

In: Journal of Physical Chemistry B, Vol. 111, No. 40, 11.10.2007, p. 11638-11641.

Research output: Contribution to journalArticle

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