Self-assembled hollow nanospheres strongly enhance photoluminescence.


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).

DOI: 10.1021/ja202179t

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@article{Ke2011SelfassembledHN, title={Self-assembled hollow nanospheres strongly enhance photoluminescence.}, author={Damei Ke and Chuanlang Zhan and Shuangping Xu and Xunlei Ding and Aidong Peng and Jin Sun and Shenggui He and Alexander D Q Li and Jiannian Yao}, journal={Journal of the American Chemical Society}, year={2011}, volume={133 29}, pages={11022-5} }