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 | |
| Publication status | Published - Jan 15 2003 |
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ASJC Scopus subject areas
- Chemistry(all)
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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
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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
N2 - 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.
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.
UR - http://www.scopus.com/inward/record.url?scp=0347927251&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0347927251&partnerID=8YFLogxK
U2 - 10.1021/ja028495a
DO - 10.1021/ja028495a
M3 - Article
C2 - 12517168
AN - SCOPUS:0347927251
VL - 125
SP - 536
EP - 540
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
SN - 0002-7863
IS - 2
ER -