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    Haloalkanes and aromatic hydrocarbons sensing using Langmuir-Blodgett thin film of pillar[5]arene-biphenylcarboxylic acid

    Year: 2019

    Journal: Colloid Surf. A-Physicochem. Eng. Asp., Volume 565, 1-Mar, page 108–117

    Authors: Kursunlu, Ahmed Nuri; Acikbas, Yaser; Ozmen, Mustafa; Erdogan, Matem; Capan, Rifat

    Organizations: Research Foundation of Selcuk UniversitySelcuk University [BAP-16611114]; Research Foundation of Usak UniversityUsak University [UBAP-2017/HD-MF001]

    Keywords: Pillararene; Langmuir-Blodgett; Surface plasmon resonance; Quartz crystal microbalance; Volatile organic compounds; Swelling

    Here, a pillar [5]arene derivative including biphenylcarboxylic acid groups was designed for obtaining a macrocycle with an ideal cavity for volatile organic compounds. The pillar[5]arene -biphenylcarboxylic acid (P5-BPCA) based Langmuir-Blodgett (LB) thin films were produced onto 50 nm thick gold-coated glass and 3.5 MHz quartz crystal substrates to form a thin film chemical sensor element. Surface plasmon resonance (SPR) and Quartz crystal microbalance (QCM) techniques were employed to characterize all the P5-BPCA LB thin film layers. The mass of LB film layer loaded onto a quartz crystal and the resonance frequency shifts per layer were determined to be 711.71 ng per layer (2.68 ng mm(-2)) and 48.24 Hz per layer, respectively. The P5-BPCA LB thin film sensor element was exposed to various haloalkane and aromatic hydrocarbon vapors. The sensitivities of the P5-BPCA LB film sensor were determined between 1.776 and 3.976 Hz ppm(-1). Sensitivity with detection limits were obtained between 0.754 and 1.689 ppm against organic vapors. The results showed that P5-BPCA LB thin film was highly selective with a large response to chloromethane vapor.
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