7-Alkoxy-appended coumarin derivatives: synthesis, photo-physical properties, aggregation behaviours and current–voltage (<i>I</i>–<i>V</i>) characteristic studies on thin films
作者:Abhijit Rudra Paul、Bapi Dey、Sudip Suklabaidya、Syed Arshad Hussain、Swapan Majumdar
DOI:10.1039/d1ra00762a
日期:——
coumarin derivatives. From I-V characteristics, it was found that at room temperature, the spin-coated films of coumarin derivatives containing an ester functional group exhibited a threshold switching behaviour, whereas derivatives containing the carboxylic acid functional group showed both threshold and bipolar switching behaviours. We also noticed that the I-V characteristic features of synthesized materials
在本研究中,我们设计并合成了一系列在香豆素-3-羧酸酯/羧酸核心的第七位上附加有长烷氧基链的香豆素衍生物,以制备薄膜材料。通过溶液中的紫外和荧光光谱以及通过 LB 和旋涂方法制备的薄膜对合成的化合物进行了表征。分别通过AFM、SEM和IV特征图来判断薄膜的表面形貌和电学行为。等温线、紫外-可见吸收和荧光光谱研究揭示了薄膜上聚集体的形成。SEM 和 AFM 图像的结果提供了有关香豆素衍生物薄膜上聚集体的长度和高度的信息。从IV特性来看,在室温下,含有酯官能团的香豆素衍生物的旋涂膜表现出阈值转换行为,而含有羧酸官能团的香豆素衍生物的旋涂膜同时表现出阈值和双极性转换行为。我们还注意到,合成材料的 IV 特征取决于各个系列的烷基链的长度。