Enhancement of photodriven charge separation by conformational and intermolecular adaptations of an anthracene-perylenediimide-anthracene triad to an aqueous environment

Mustafa Supur, Young Mo Sung, Dongho Kim, Shunichi Fukuzumi

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Photoinduced electron-transfer dynamics of an electron donor-acceptor-donor triad, consisting of anthracenes and perylenediimide (An2PDI), were investigated in different media by using time-resolved laser spectroscopic techniques. The aromatic components are attached by flexible linkers containing hydrophilic quaternary ammonium joints in the triad. In MeOH, in which An 2PDI dissolves completely, no electron-transfer products were observed in the transient absorption measurements after the excitation of anthracenes and PDI because of the rapid back-electron transfer. The charge-separation rate of the triad in MeOH was estimated as 1.2 × 10 10 s-1 from the quenching of the singlet-excited state of PDI. In contrast, the formation of electron-transfer products was evident in water, and the electron-transfer rate was 200 times faster than the rate in MeOH in the course of the excitations of the selected components of An 2PDI (2.5 × 1012 s-1). It is concluded from the time-resolved data that the conformational disposition of the hydrophilic joints due to hydrophilic-lipophilic interactions and the facile π-stacking of hydrophobic PDI cores in water results in the contraction and the relative rigidity of the electron-transfer distance and the intermolecular stabilization of electron-transfer species within the polymeric self-assemblies of An2PDI, enabling an efficient photodriven electron-transfer process to occur.

Original languageEnglish
Pages (from-to)12438-12445
Number of pages8
JournalJournal of Physical Chemistry C
Volume117
Issue number24
DOIs
Publication statusPublished - 2013 Jun 20

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Anthracene
polarization (charge separation)
anthracene
electron transfer
Electrons
augmentation
Anthracenes
excitation
perylenediimide
products
Water
rigidity
water
contraction
Ammonium Compounds
self assembly
Excited states
Rigidity
Self assembly
stabilization

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Surfaces, Coatings and Films
  • Physical and Theoretical Chemistry

Cite this

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title = "Enhancement of photodriven charge separation by conformational and intermolecular adaptations of an anthracene-perylenediimide-anthracene triad to an aqueous environment",
abstract = "Photoinduced electron-transfer dynamics of an electron donor-acceptor-donor triad, consisting of anthracenes and perylenediimide (An2PDI), were investigated in different media by using time-resolved laser spectroscopic techniques. The aromatic components are attached by flexible linkers containing hydrophilic quaternary ammonium joints in the triad. In MeOH, in which An 2PDI dissolves completely, no electron-transfer products were observed in the transient absorption measurements after the excitation of anthracenes and PDI because of the rapid back-electron transfer. The charge-separation rate of the triad in MeOH was estimated as 1.2 × 10 10 s-1 from the quenching of the singlet-excited state of PDI. In contrast, the formation of electron-transfer products was evident in water, and the electron-transfer rate was 200 times faster than the rate in MeOH in the course of the excitations of the selected components of An 2PDI (2.5 × 1012 s-1). It is concluded from the time-resolved data that the conformational disposition of the hydrophilic joints due to hydrophilic-lipophilic interactions and the facile π-stacking of hydrophobic PDI cores in water results in the contraction and the relative rigidity of the electron-transfer distance and the intermolecular stabilization of electron-transfer species within the polymeric self-assemblies of An2PDI, enabling an efficient photodriven electron-transfer process to occur.",
author = "Mustafa Supur and Sung, {Young Mo} and Dongho Kim and Shunichi Fukuzumi",
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Enhancement of photodriven charge separation by conformational and intermolecular adaptations of an anthracene-perylenediimide-anthracene triad to an aqueous environment. / Supur, Mustafa; Sung, Young Mo; Kim, Dongho; Fukuzumi, Shunichi.

In: Journal of Physical Chemistry C, Vol. 117, No. 24, 20.06.2013, p. 12438-12445.

Research output: Contribution to journalArticle

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AU - Supur, Mustafa

AU - Sung, Young Mo

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AU - Fukuzumi, Shunichi

PY - 2013/6/20

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