TY - JOUR
T1 - Dendrimer photoantenna supermolecules
T2 - Energetic funnels, exciton hopping and correlated excimer formation
AU - Swallen, S. F.
AU - Kopelman, R.
AU - Moore, J. S.
AU - Devadoss, C.
N1 - Funding Information:
We acknowledge support for this research from the National Science Foundation, Division of Materials Sciences, grant DMR-9410709.
PY - 1999/8/10
Y1 - 1999/8/10
N2 - A novel set of purely hydrocarbon dendrimer supermolecules has been studied, providing direct evidence of unusual photophysical and photochemical characteristics. The molecular structure gives rise to discrete exciton localization, allowing the formation of a highly photoactive antenna with a discrete energetic funnel. Steady state and fluorescence lifetime measurements have shown rapid and efficient exciton trapping at the molecular locus. Unique geometric and energetic attributes are observed which provide a means of protection from photobleaching, enhancing the longevity of these molecules. In addition, unexpected wavelength-dependent excimer formations are seen, suggesting unusual excitation-induced intermolecular interactions and dimer formations in more than one single excited state.
AB - A novel set of purely hydrocarbon dendrimer supermolecules has been studied, providing direct evidence of unusual photophysical and photochemical characteristics. The molecular structure gives rise to discrete exciton localization, allowing the formation of a highly photoactive antenna with a discrete energetic funnel. Steady state and fluorescence lifetime measurements have shown rapid and efficient exciton trapping at the molecular locus. Unique geometric and energetic attributes are observed which provide a means of protection from photobleaching, enhancing the longevity of these molecules. In addition, unexpected wavelength-dependent excimer formations are seen, suggesting unusual excitation-induced intermolecular interactions and dimer formations in more than one single excited state.
KW - Excimers
KW - Hydrocarbon dendrimers
KW - Photoactive antenna
KW - Photobleaching protection
KW - Supermolecules
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U2 - 10.1016/S0022-2860(99)00188-X
DO - 10.1016/S0022-2860(99)00188-X
M3 - Article
AN - SCOPUS:0033543146
SN - 0022-2860
VL - 485-486
SP - 585
EP - 597
JO - Journal of Molecular Structure
JF - Journal of Molecular Structure
ER -