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

doi:10.1021/ja028495a

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

Northwestern University, Argonne National Laboratory

Research output: Contribution to journal › Article › peer-review

32 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 language	English
Pages (from-to)	536-540
Number of pages	5
Journal	Journal of the American Chemical Society
Volume	125
Issue number	2
DOIs	https://doi.org/10.1021/ja028495a
Publication status	Published - Jan 15 2003

ASJC Scopus subject areas

Catalysis
Chemistry(all)
Biochemistry
Colloid and Surface Chemistry

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10.1021/ja028495a

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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 journal › Article › peer-review

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