Self-Assembled Hollow Nanospheres Strongly Enhance Photoluminescence

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• 作者：Damei Ke ; Chuanlang Zhan ; Shuangping Xu ; Xunlei Ding ; Aidong Peng ; Jin Sun ; Shenggui He ; Alexander D. Q. Li ; Jiannian Yao
• 刊名：Journal of the American Chemical Society
• 出版年：2011
• 出版时间：July 27, 2011
• 年：2011
• 卷：133
• 期：29
• 页码：11022-11025
• 全文大小：786K
• 年卷期：v.133,no.29(July 27, 2011)
• ISSN：1520-5126

文摘

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 (桅 < 0.2), but the nanospheres emit strong yellow fluorescence (桅 鈮?0.58鈥?.85).