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

^*Corresponding author for this work

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

34 Scopus citations

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 (US)
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
State	Published - Jan 15 2003
Externally published	Yes

ASJC Scopus subject areas

General Chemistry
Biochemistry
Catalysis
Colloid and Surface Chemistry

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10.1021/ja028495a

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

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.",

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doi = "10.1021/ja028495a",

language = "English (US)",

volume = "125",

pages = "536--540",

journal = "Journal of the American Chemical Society",

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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. et al.
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

TY - JOUR

T1 - Intermolecular coupling in nanometric domains of light-harvesting dendrimer films studied by photoluminescence near-field scanning optical microscopy (PL NSOM)

AU - Lee, Lynn F.

AU - Adronov, Alex

AU - Schaller, Richard D.

AU - Fréchet, Jean M.J.

AU - Saykally, Richard J.

PY - 2003/1/15

Y1 - 2003/1/15

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AB - 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.

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

Abstract

ASJC Scopus subject areas

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