Calix[4]arene-triazine conjugate intermediate: optical properties and gas sensing responses against aromatic hydrocarbons in Langmuir–Blodgett films

摘要: 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) synthesized and Langmuir–Blodgett (LB) thin films this compound modified heterocyclic units were examined for its optical properties gas sensing capabilities against trace vapor aromatic BTX hydrocarbons (benzene, toluene, xylene) through surface plasmon resonance technique. In line purpose, the experimental SPR data fitted using Winspall software to evaluate C4AsTr film. Such thickness refractive index values LB determined as 1.19 ± 0.02 nm per monolayer, 1.60 ± 0.04 index. Exposed above-mentioned measured technique, photodetector responses these sensors, ΔI, recorded function time during kinetic process. order quantify real-time data, early Fick’s diffusion law handled extract coefficients. There two different regions observed slopes indicating that one belongs fast second slow bulk into All results both theoretical indicated thin-film exhibit high response, good sensitivity selectivity saturated benzene than others. These aniline substituted triazine heterocycle have been potential candidates applications simple low-cost preparation at room temperature.