Electron transfer as a probe of the permeability of organic monolayers on the surfaces of colloidal PbS quantum dots

Kathryn E. Knowles, Mario Tagliazucchi, Michał Malicki, Nathaniel K. Swenson, Emily A Weiss

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Transient absorption measurements on both the picosecond and microsecond time scales reveal that the efficiencies with which a series of alkyl-substituted p-benzoquinone (s-BQ) molecules participate in static and collisional photoinduced electron transfer (PET) with colloidal PbS quantum dots (QDs) in dichloromethane solution depend on both the size and shape of the s-BQ molecule. The efficiencies of both static and collisional PET are limited by the presence of the oleate ligand shell on the surface of the QDs and decrease with an increase in molecular volume, VQ, of the s-BQ, in general; however, the substitution patterns on the BQ ring that facilitate static PET are not the same patterns that facilitate collisional PET. A model for the dependence of the collisional quenching efficiency on VQ allows quantitative characterization of both the permeability and average thickness of the oleate ligand shell of the QDs in a dichloromethane solution.

Original languageEnglish
Pages (from-to)15849-15857
Number of pages9
JournalJournal of Physical Chemistry C
Volume117
Issue number30
DOIs
Publication statusPublished - Aug 1 2013

Fingerprint

Semiconductor quantum dots
Monolayers
permeability
electron transfer
quinones
quantum dots
Electrons
probes
Methylene Chloride
Dichloromethane
Oleic Acid
Ligands
ligands
Molecules
molecules
Quenching
Substitution reactions
quenching
substitutes
rings

ASJC Scopus subject areas

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

Cite this

Electron transfer as a probe of the permeability of organic monolayers on the surfaces of colloidal PbS quantum dots. / Knowles, Kathryn E.; Tagliazucchi, Mario; Malicki, Michał; Swenson, Nathaniel K.; Weiss, Emily A.

In: Journal of Physical Chemistry C, Vol. 117, No. 30, 01.08.2013, p. 15849-15857.

Research output: Contribution to journalArticle

Knowles, Kathryn E. ; Tagliazucchi, Mario ; Malicki, Michał ; Swenson, Nathaniel K. ; Weiss, Emily A. / Electron transfer as a probe of the permeability of organic monolayers on the surfaces of colloidal PbS quantum dots. In: Journal of Physical Chemistry C. 2013 ; Vol. 117, No. 30. pp. 15849-15857.
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