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Self-assembled hollow nanospheres strongly enhance photoluminescence.
- Source :
-
Journal of the American Chemical Society [J Am Chem Soc] 2011 Jul 27; Vol. 133 (29), pp. 11022-5. Date of Electronic Publication: 2011 Jun 30. - Publication Year :
- 2011
-
Abstract
- We report that two molecular building blocks differ only by two protons, yet they form totally different nanostructures. The protonated one self-organized into hollow nanospheres (~200 nm), whereas the one without the protons self-assembled into rectangular plates. Consequently, the geometrically defined nanoassemblies exhibit radically different properties. As self-assembly directing units, protons impart ion-pairing and hydrogen-bonding probabilities. The plate-forming nanosystem fluoresces weakly, probably due to energy transfer among chromophores (Φ < 0.2), but the nanospheres emit strong yellow fluorescence (Φ ≈ 0.58-0.85).
Details
- Language :
- English
- ISSN :
- 1520-5126
- Volume :
- 133
- Issue :
- 29
- Database :
- MEDLINE
- Journal :
- Journal of the American Chemical Society
- Publication Type :
- Academic Journal
- Accession number :
- 21699223
- Full Text :
- https://doi.org/10.1021/ja202179t