Potassium tetrakis 4 chlorophenyl borate ktpclpb

Clomipramine pure powder was supplied by Novartis Pharmaceutical Company, Cairo, Egypt, with purity 99.55 ± 0.89%. Anafranil^® tablets manufactured by Novartis pharmaceutical company (Egypt) were obtained from the Egyptian market claimed to include 25 mg Clomipramine HCl per tablet. Potassium tetrakis(4-chlorophenyl)borate (KTpClPB), calix[4]arene, and o-nitrophenyl octyl ether (o-NPOE) were bought from Sigma Aldrich (Missouri, United States). Polyvinyl chloride (PVC) was bought from Fluka (Steinheim, Germany). Graphene nano-platelets (6–8 nm thick × 5 microns wide) were obtained from Strem Chemicals INC. (Newburyport, USA). Britton – Robinson (BR) buffer was prepared by mixing phosphoric acid (0.04 M), acetic acid (0.04 M) and boric acid (0.04 M). Buffer solutions of different pH values were adjusted by the addition of 0.2 M NaOH. Screen-printed carbon electrodes (C-SPE) showing a diameter of 3 mm was obtained from CH Instruments, Inc., (Texas, USA).

The materials and reagents used for the fabrication and characterization of the devices were purchased from the following commercial sources: a polyimide sheet (thickness: 130 μm) from JMT Corporation (Osaka, Japan); a positive photoresist (S-1818G) from Dow Chemical (Midland, MI, USA); bis(12-crown-4) and 2-nitrophenyloctyl ether (NPOE) from Dojindo (Kumamoto, Japan); valinomycin, dioctyl sebacate (DOS), tetrahydrofuran (THF), polyvinylpyrrolidone (PVP), polyvinyl chloride (PVC), potassium chloride (KCl), and sodium chloride (NaCl) from Wako Pure Chemical Industries (Osaka, Japan); and sodium tetraphenylborate, poly(2-hydroxyethyl methacrylate) (poly(HEMA)), and potassium tetrakis(4-chlorophenyl)borate (KTpClPB) from Sigma Aldrich (Buchs, Switzerland). Syringe needles (inner diameter: 0.9 mm, outer diameter: 1.3 mm) were purchased from Terumo (Tokyo, Japan). Solutions were prepared with Milli-Q water (Millipore, Tokyo, Japan).

The chemicals used in this study were of analytical grade. 1-(Pyridin-4-yl)ethan-1-one, 1-bromododecane, 4-amino-1,5-dimethyl-2-phenyl-1,2-dihydro-3H-pyrazol-3-one, o-nitrophenyl octyl ether (o-NPOE), dioctyl sebacate (DOS), chloronaphthalene (CN), dioctyl adipate (DOA), dioctyl phthalate (DOP), potassium tetrakis(4-chlorophenyl) borate (KTpClPB), and dibutyl phthalate (DBP) were obtained from Sigma-Aldrich. Tetrahydrofuran (THF), ethanol, and polyvinyl chloride (PVC) were purchased from Merck. Deionized water was applied throughout to prepare all aqueous solutions. Nitrate salts of cations were used for selectivity studies.