Fluorescence dynamics of chlorophyll trefoils in the solid state studied by single-molecule fluorescence spectroscopy

Ji Eun Lee, Jaesung Yang, Victoria L. Gunderson, Michael R Wasielewski, Dongho Kim

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

We have comparatively investigated the single-molecule photophysical properties of two chlorophyll trefoils that feature distinctive electronic couplings induced by differences in linkage: one is an ethynyl-linked chlorophyll trefoil (1) in which relatively short and rigid linkage between the chromophores promotes effective electronic coupling, and the other is a phenyl-ethynyl-linked chlorophyll trefoil (2) in which the phenyl addition induces an orthogonal geometry impeding π-conjugation and provides a longer interchlorophyll distance reducing through-space interaction. By recording single-molecule fluorescence intensity trajectories and their corresponding lifetimes, we observed one-step photobleaching behaviors, less frequent on-off behaviors, a narrower fluorescence lifetime distribution, and higher photostability in 1 as compared with 2. These results indicate that the performance of molecular photosynthetic systems in the solid state is strongly associated with electronic couplings and, thus, give insight into the construction of well-functioning artificial photosynthetic systems.

Original languageEnglish
Pages (from-to)284-289
Number of pages6
JournalJournal of Physical Chemistry Letters
Volume1
Issue number1
DOIs
Publication statusPublished - Jan 2010

Fingerprint

Fluorescence spectroscopy
chlorophylls
Chlorophyll
Fluorescence
solid state
linkages
fluorescence
Molecules
electronics
spectroscopy
molecules
Photobleaching
life (durability)
Chromophores
conjugation
chromophores
recording
Trajectories
trajectories
Geometry

Keywords

  • Kinetics
  • Spectroscopy

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Fluorescence dynamics of chlorophyll trefoils in the solid state studied by single-molecule fluorescence spectroscopy. / Lee, Ji Eun; Yang, Jaesung; Gunderson, Victoria L.; Wasielewski, Michael R; Kim, Dongho.

In: Journal of Physical Chemistry Letters, Vol. 1, No. 1, 01.2010, p. 284-289.

Research output: Contribution to journalArticle

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