Investigation of calix[4]arene derivatives that can be sensitive for chlorinated volatile organic compound (CVOC) species in quartz crystal microbalance (QCM) sensor system

In this thesis study, we aimed to preparing QCM gaseous sensors which is coated with amide functionalized calix[4]arene derivative and investigating their sensing properties towards some chlorinated volatile organic compound (CVOC) species (chloroform, dichloromethane, carbon tetrachloride, 1,2-dichloroethane, 1,1-dichloroethylene, trichloroethylene, tetrachloroethylene, 1,2-dichlorobenzene). Several amide functionalized calix[4]arene derivatives CPRA, CIMA, and CANA are synthesized to use QCM gaseous system. Characterization of synthesized derivatives were performed by 1H-NMR and FT-IR spectroscopy. QCM gaseous sensors are prepared by soaking method of coating on QCM surface with synthesized calix[4]arene derivatives C4, CDES, CPRA, CIMA, CANA. Calix[4]arene derivatives coated QCM sensors was performed towards chlorinated volatile organic compounds in gaseous media. Calix[4]arene CIMA derivative showed that higher stoichiometric ratio for all chlorinated volatile organic compound because of their imidazolyl and amide group, especially ethylene dichloride (EDC) . Calix[4]arene CIMA derivative is performed to calculate parameter studies, Langmuir and Freundlich, Scatchard isotherms, which are towards different concentration value of 1,2-dichloroethane which has highest stoichiometric ratio to investigate adsorption properties, Repeatability and durability studies were performed toward EDC by calix[4]arene CIMA coated QCM sensor in gaseous media. The obtained results showed that amide functionalized calix[4]arene derivatives coated QCM gaseous sensors are effective to sensing of chlorinated volatile organic compounds.