Nanoscale Cavities for Fulleropyrrolidinium in Nafion Membrane

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• 作者：Junxin Li ; Shuang Zhang ; Pu Zhang ; Dongfang Liu ; Zhi-Xin Guo ; Cheng Ye ; and Daoben Zhu
• 刊名：Chemistry of Materials
• 出版年：2003
• 出版时间：December 16, 2003
• 年：2003
• 卷：15
• 期：25
• 页码：4739 - 4744
• 全文大小：149K
• 年卷期：v.15,no.25(December 16, 2003)
• ISSN：1520-5002

文摘

A general method was developed to incorporate fulleropyrrolidinium into the nanoscalecavities of Nafion membrane through electrostatic interaction. The aggregated sizes andstructures of fulleropyrrolidinium were controlled by the cavities of Nafion membrane, whichwere confirmed by XPS and TEM studies. The incorporation was a diffusion-controlled processas evidenced from the absorption spectroscopic method. The absorption spectra of fulleropyrrolidinium nanoaggregates extended to the near-IR region and the fluorescence emissionspectra were red-shifted due to the formation of excimers. The resulting fulleropyrrolidinium-Nafion nanocomposites exhibit significant optical-limiting effects at both 532 and1064 nm, which imply their potential as broadband optical limiters to protect optical devicesfrom damage by lasers.