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Qualitative Identification of Carboxylic Acids, Boronic Acids, and Amines Using Cruciform Fluorophores
Published on: August 19, 2013
Fluorescence-switching 2-D sheet structure formed by self-assembly of cruciform aromatic amphiphiles
Wei Zhang1,2, Yongsheng Li2, Tianyi Zheng2
1College of Science, Shenyang University of Chemical Technology, Liaoning 110142, China. xieying.72@163.com.
Abstract:
We report that aromatic amphiphiles based on cruciform aromatic segments self-assemble into 2-D sheet structures in aqueous environments. Notably, the aromatic amphiphile based on a pyrene unit generates fluorescence-switching 2-D sheet structures. In a pH-neutral condition, the sheets show strong excimer emission. However, upon lowering the pH the excimer emission is quenched due to loosely-packed pyrene units. Subsequent return of pH to a neutral condition leads to full recovery of the excimer emission, indicative of fully-reversible fluorescence emission switching.
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