Amplifying Emission Enhancement and Proton Response in a Two-Component Gel

详细信息    查看全文

• 作者：Pengchong Xue ; Ran Lu ; Peng Zhang ; Junhui Jia ; Qiuxia Xu ; Tierui Zhang ; Makoto Takafuji ; Hirotaka Ihara
• 刊名：Langmuir
• 出版年：2013
• 出版时间：January 8, 2013
• 年：2013
• 卷：29
• 期：1
• 页码：417-425
• 全文大小：526K
• 年卷期：v.29,no.1(January 8, 2013)
• ISSN：1520-5827

文摘

A glutamide gelator, 1, was synthesized, and a weak emission enhancement was observed during its gelation. In addition, 1 could be an excellent scaffold for successfully embedding an energy acceptor, 2, into its aggregate to obtain highly efficient energy transfer. An amplification of the emission enhancement was observed in the two-component gels compared to that of the neat gel of 1 during gel formation. For example, 1 induced only a 2.5-fold increase in emission intensity, whereas a 23-fold enhanced emission could be observed in the two-component gel with only 1.6 mol % 2. Furthermore, two-component gels had an excited proton response. In systems with low acceptor concentrations, the hot solution red-shifted the fluorescence from blue to yellow upon the addition of a proton, which continuously blue-shifted with decreasing temperature to form the gel given that the binding of the gelator to the proton is weakened during coassembly. Moreover, the casting film formed by the two-component wet gel had an excellent response to volatile acids such as hydrochloric acid, trifluoroacetic acid, and so on and could be reversibly recovered by exposure to NH₃.