Intermolecular coupling in nanometric domains of light-harvesting dendrimer films studied by photoluminescence near-field scanning optical microscopy (PL NSOM)

Lynn F. Lee, Alex Adronov, Richard D Schaller, Jean M J Fréchet, Richard J. Saykally

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Near-field scanning optical microscopy (NSOM) has been used to investigate the photophysical characteristics of first- to fourth-generation (G1 to G4) light-harvesting dendrimer thin films containing coumarin-343 and coumarin-2 as the core and peripheral chromophores, respectively. Thin film photoluminescence (PL) spectra exhibit a significant red shift in the lower generations (G1, G2, and G3) as compared to their respective solution PL spectra, implying the formation of excimers. Spatially resolved PL NSOM images exhibit pronounced nanoscopic domains in G1, which become more homogeneous in higher generations due to site-isolation of the core chromophore. G4 exhibits complete site-isolation for these light-harvesting dendrimer films.

Original languageEnglish
Pages (from-to)536-540
Number of pages5
JournalJournal of the American Chemical Society
Volume125
Issue number2
DOIs
Publication statusPublished - Jan 15 2003

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Near field scanning optical microscopy
Dendrimers
Microscopy
Photoluminescence
Chromophores
Light
Thin films
coumarin
coumarin 343

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Intermolecular coupling in nanometric domains of light-harvesting dendrimer films studied by photoluminescence near-field scanning optical microscopy (PL NSOM). / Lee, Lynn F.; Adronov, Alex; Schaller, Richard D; Fréchet, Jean M J; Saykally, Richard J.

In: Journal of the American Chemical Society, Vol. 125, No. 2, 15.01.2003, p. 536-540.

Research output: Contribution to journalArticle

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