Aromatik hidrokarbonların dedekte edilmesi için kaliksaren bazlı diamid kimyasal sensor çiplerinin geliştirilmesi

Abstract

In the present work, a new macrocycle materials (SB77) was selected and Langmuir-Blodgett thin films of this macrocycle compounds were examined for its vapor sensing capabilities against vapor of aromatic BTX hydrocarbons (benzene, toluene, xylene) through Quartz Crystal Microbalance (QCM) technique. In accordance with this aim, the calix [4]arene LB thin films were prepared onto quartz crystal substrates. The characterization of SB77 LB thin film was performed for nine LB layers fabricated onto the quartz crystal. The frequency shifts and the mass changes for monolayer of these LB thin films were obtained as 32.35 Hz / per layer and 2206.65 ng (8.32 ng mm -2 ), respectively. All QCM results indicated that SB77 LB thin film chemical sensors exhibits high response, a good sensitivity and selectivity for benzene vapor at saturated or different concentrations than other aromatic hydrocarbon vapors. These LB thin film sensors with SB77 calix [4]arene macrocycle materials have been potential candidates for organic vapor sensing applications with simple and low cost preparation at room temperature.

A Review of Quartz Crystal Microbalance for Chemical and Biological Sensing Applications

“…Due to their cavity size and cyclical structure, macrocycle molecules serve as an ideal sensing layer. Zeybek et al [ 49 ] utilized a chiral calix[4]arene macrocycle material as a sensing element coating over a 3.5-MHz QCM sensor for detecting BTX hydrocarbons (benzene, toluene, and xylene) vapors. Nine film layers were deposited over the QCM electrode using the Langmuir–Blodget technique.…”

“…0.06 ppm Ca. 22.9 Hz/ppm [ 52 ] Chemical MOF-14 Benzene vapor 150 ppm 1200 Hz @ 80 ppm [ 48 ] Chemical Polystyrene Effect of UV on polystyrene thin film [ 46 ] Chemical PDMS microcolumns over graphene oxide flakes VOC compounds 80 ng/cm 2 Sensitivity at the ng level [ 45 ] Chemical Macrocycle materials (SB77) Aromatic BTX hydrocarbons 31.7 Hz/number of layers [ 49 ] Chemical Calix Resorcinarenes Heavy metal in an aqueous solution For cadmium ions: 0.32 ppm For cadmium ions: 0.225 Hz/ppm [ 50 ] For ionophore I:0.18 ppm for copper and 0.2 ppm for lead For ionophore I:0.028 Hz/ppm for copper and 0.048 Hz/ppm Chemical Copper–manganese composite Formaldehyde 1.7 ppm 6.35 Hz/µg ppm [ 53 ] Chemical Enantiomeric macrocycles bearing chiral moieties Lead (II) ions For complex B: 0.45 ppm In order of 0.008 and 0.020 Hz/ppm [ 51 ] For complex C: 0.30 ppm …”