Unusual fluorescence and sol–gel transition properties of a pyridine-based polymeric gel formed via the hydrazone reaction
A polymeric gel via the hydrazone reaction was prepared. A remarkable fluorescence attributed to the aggregation-induced emission (AIE) effect occurred via a gelation process, which was not seen in its sol state. The fluorescence intensity of the polymeric gel was dependent on the concentration of HCl. Furthermore, the gel underwent a sol–gel transition at ca. 140 °C. This property is uniquely different in comparison with general polymeric gels.