1. Dendritic [2]rotaxanes: synthesis, characterization, and properties.
- Author
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Guoxing Liu, Ziyong Li, Di Wu, Wen Xue, Tingting Li, Sheng Hua Liu, and Jun Yin
- Subjects
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DENDRIMERS , *ROTAXANES , *FLUORESCENCE , *PYRENE ,SALTS Cave (Ky.) - Abstract
A series of dendritic ammonium salts have been designed and synthesized. Subsequently, they were used to construct the corresponding [2]rotaxanes by a template-directed clipping approach. Unusually, two unsymmetrical dendritic [2]rotaxanes containing fluorophore (pyrene units) were also obtained; their optical properties, such as UV/vis absorption and fluorescence, were measured. The results indicate that these two rotaxanes possess stronger intermolecular interaction in the solid state than in solution. As a result, solutions of high concentration readily formed the excimer. These special rotaxanes might be applied in dynamic fluorescence-reponsive materials, and the rotaxane structure will also be used as a strategy to adjust the aggregated behaviors of fluorescent molecules. [ABSTRACT FROM AUTHOR]
- Published
- 2014
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