苝酰亚胺衍生物一维单晶纳米结构气敏传感性能的研究

As an n-type organic semiconductor, perylenediimide derivatives can be used as gas sensors for probing some organic amines by electrical or fluorescent signals. However, its poor gas stability and selectivity has limited its further application in material. In this proposal, six perylenediimide derivatives that bearing electron-withdrawing groups in the so-called bay-area are going to prepare and their one-dimensional nanostructures will be obtained by a simple physical vapor deposition. More importantly, the stability and selectivity of these gas sensors are going to determining based on their conductometric sensing devices in the amine vapor. This study is focused on the improving of stability and selectivity of these gas sensors and reveals the effect of electron-withdrawing groups and molecule aggregation on their stability and selectivity. It is expected this study can provide some valuable data in theory as well as in experiment for the further development of high-performance gas sensor materials.

作为一类n型有机半导体，苝酰亚胺衍生物可广泛应用于胺类气体的高效快捷检测，但其较差的气敏稳定性和选择性限制了其在实际生活的应用。本申请以提高苝酰亚胺衍生物材料的气敏稳定性和气敏选择性为研究目标，以优化分子结构为研究切入点，设计合成两类共六种苝湾含吸电子基的苝酰亚胺衍生物，拟通过物理气相传输方法制备其一维单晶纳米结构。并对获得的单晶纳米结构采用电学测量方法，研究其在弱还原性氨气气氛下的气敏稳定性变化规律及气敏选择性变化规律。探讨并揭示分子结构、分子堆积方式对苝酰亚胺衍生物一维单晶纳米结构的气敏稳定性和气敏选择性变化规律的影响，为进一步开展其器件性能研究提供科学依据。

作为一类n型有机半导体，苝酰亚胺衍生物可广泛应用于胺类气体的高效快捷检测。本项目制备两类共十九种苝酰亚胺衍生物，系统研究其自组装行为和组装体在水合肼气氛中气敏传感性能，研究结果揭示：1）酰胺N原子处烷基链的长度和苝湾处烷基链立体异构中心可显著影响手性苝酰亚胺衍生物分子的微观聚集行为和宏观聚集形态，通过改变分子面间距和π-π相互作用可调控宏观聚集体气敏传感性能；2）苝湾处脂肪烷基链和芳香基团均可影响非手性苝酰亚胺衍生物宏观聚集形态，通过改变苝酰亚胺衍生物分子能级结构、聚集方式和面间距可显著影响宏观聚集体气敏传感性能。上述研究系统揭示了苝酰亚胺衍生物气敏传感器结构和性能的关系，为制备高性能有机气敏传感器提供理论依据。