Self-assembly of a chlorophyll-based cyclic trimer

Structure and intramolecular energy transfer

Victoria L. Gunderson, Michael R Wasielewski

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Small- and wide-angle X-ray scattering (SAXS/WAXS) and DOSY 1H NMR reveal that a zinc methyl pyrochlorophyllide a (Chl) derivative with a 3-pyridyl ligand at the Chl 20-position self-assembles in toluene solution into a cyclic trimer having a radius of 8.2 ± 0.1 Å. Femtosecond transient absorption spectroscopy shows that singlet-singlet annihilation occurs within the cyclic trimer as a result of energy transfer between the Chls that occurs with an (11 ± 1 ps)-1 rate constant, which agrees with the predictions of Förster theory, even though the Chl-Chl distances are comparable to the length of the Chl transition dipole.

Original languageEnglish
Pages (from-to)303-307
Number of pages5
JournalChemical Physics Letters
Volume556
DOIs
Publication statusPublished - Jan 29 2013

Fingerprint

Toluene
chlorophylls
Chlorophyll
trimers
X ray scattering
Absorption spectroscopy
Energy transfer
Self assembly
self assembly
Zinc
Rate constants
energy transfer
Nuclear magnetic resonance
Ligands
Derivatives
toluene
absorption spectroscopy
zinc
dipoles
nuclear magnetic resonance

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Physics and Astronomy(all)

Cite this

Self-assembly of a chlorophyll-based cyclic trimer : Structure and intramolecular energy transfer. / Gunderson, Victoria L.; Wasielewski, Michael R.

In: Chemical Physics Letters, Vol. 556, 29.01.2013, p. 303-307.

Research output: Contribution to journalArticle

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