基于电化学聚合方法制备荧光薄膜及其在爆炸物检测中的研究

Preparation of Fluorescent Films Based on Electrochemical Polymerization and the Application in Explosive Detection

荧光薄膜在有机光电、荧光传感等领域具有广泛的应用。制备荧光薄膜的方法主要是通过旋涂法、流延法、真空镀膜法等。但是由于此类方法存在材料浪费严重,薄膜内部结构无法调控等缺点,还存在较大的改进空间。电化学方法通过调控电化学参数(扫描电压、扫描速度、扫描圈数等)可以有效地控制薄膜的微结构以及薄膜厚度,此外电化学聚合具有成本低、操作简单等优点,便于市场的推广。三聚-(9,9-二(N-咔唑-己基))芴(TFCz)电聚合薄膜对于TNT蒸气的荧光响应,在600s内,薄膜荧光强度淬灭率为55%;对于DNT蒸气,在120s内,其荧光强度淬灭率为90%。

The fluorescent films have a wide range of applications in organic optoelectronics, fluorescence sensing and other fields. Some methods have been used for preparing fluorescent films including spin coating, tape casting, vacuum coating, etc. However, these methods exhibit some disad-vantages, such as serious waste of materials, the internal structure of the film cannot be regulated and so on. These problems need to be solved. The microstructure and thickness of the films can be effectively controlled by adjusting the electrochemical parameters(scanning voltage, scanning speed,number of scanning cycles, etc.). In addition, the electrochemical polymerization has the advantages of low cost, simple operation, and it is convenient for market promotion. Upon exposure to TNT vapor for 600 s, the fluorescent intensity of TFCz EP films can be quenched to 55%. For DNT vapor, the fluorescent intensity of TFCz EP films can be quenched to 90% in 120 s.