The detection of organic vapors by chemically based sensors was achieved with macromolecules having convenient molecular cavities. Addressed herein, a calix[4]arene derivative 25,27-(4-chloro-2-phenylamino-1,3,5-triazine)-26,28-dihydroxycalix[4]arene (C4AsTr) was synthesized and Langmuir–Blodgett (LB) thin films of this compound modified with heterocyclic units were examined for its optical properties and gas sensing capabilities against trace vapor of aromatic BTX hydrocarbons (benzene, toluene, xylene) through surface plasmon resonance technique. In line with this purpose, the experimental SPR data were fitted using the Winspall software to evaluate optical properties of the C4AsTr film. Such thickness and refractive index values of C4AsTr LB films were determined as 1.19 ± 0.02 nm for the thickness per monolayer, and 1.60 ± 0.04 for the refractive index. Exposed to above-mentioned organic vapors were measured with SPR technique, and the photodetector responses of these optical sensors, ΔI, were recorded as a function of time during kinetic process. In order to quantify real-time SPR data, early time Fick’s diffusion law was handled to extract the diffusion coefficients. There were two different regions observed with two slopes indicating that one belongs to fast surface diffusion and second one slow for bulk diffusion into C4AsTr LB film. All SPR results both theoretical and experimental indicated that C4AsTr optical LB thin-film sensors exhibit high response, a good sensitivity and selectivity for saturated benzene vapor than others. These optical thin-film sensors with aniline substituted triazine heterocycle have been potential candidates for organic vapor sensing applications with simple and low-cost preparation at room temperature.

具有方便的分子腔的大分子可以通过化学传感器来检测有机蒸气。在此解决，合成了杯[4]芳烃衍生物25,27-（4-氯-2-苯基氨基-1,3,5-三嗪）-26,28-二羟基杯[4]芳烃（C4AsTr），Langmuir-Blodgett通过表面等离振子共振技术，研究了用杂环单元修饰的这种化合物的（LB）薄膜的光学性质和对芳族BTX烃（苯，甲苯，二甲苯）的痕量蒸气的气敏能力。符合此目的，使用Winspall软件拟合了实验SPR数据，以评估C4AsTr膜的光学性能。C4AsTr的厚度和折射率值LB膜的单层厚度确定为1.19±0.02 nm，折射率确定为1.60±0.04。暴露于上述有机蒸气与SPR技术测量，并且这些光学传感器，Δ的光检测器响应我，记录为在动力学过程作为时间的函数。为了量化实时SPR数据，处理了早期的Fick扩散定律以提取扩散系数。观察到两个不同的区域，具有两个斜率，表明一个属于快速表面扩散，第二个慢于整体扩散到C4AsTr LB膜中。所有SPR结果在理论和实验上均表明C4AsTr光学LB薄膜传感器比其他传感器具有更高的响应速度，对饱和苯蒸气的灵敏度和选择性。这些具有苯胺取代的三嗪杂环的光学薄膜传感器以简单且低成本的室温制备方法，已成为有机蒸气传感应用的潜在候选者。