Comparison of polysiloxane films substituted by undecenyl-cyclam and by naphthyl-cyclam for the design of ISFET devices sensitive to Fe3+ ions

摘要: Abstract The synthesis and properties of new silicone-based functional materials having attached cyclam macrocycles have been assessed with regard to their application as ion-sensitive membranes chemical sensors. preparation process thin films the sensitive has designed so that each compound is by means bonds: macrocyclic ionophore was chemically bound silicone polymer material surface electrochemical devices grafting. such evaluated for detection iron(III) species in water using field-effect transistor (ISFET) electrolyte–insulator–semiconductor (EIS) structures, both sensitized a coating materials. Two types derivatives two processes compared respect. first material, “PDMS-Cyclam”, prepared grafting N-10-undecenyl-cyclam poly(methylhydrosiloxane) (PMHS). second “PDMS-Naphthyl-Cyclam”, bore naphthyl pendent group enhanced complexing Fe3+ ions. Linear response respect pFe(III) = −Log[Fe3+] observed over three decades or concentration. A Nernstian toward ions “PDMS-Naphthyl-Cyclam” membrane. These exhibit good stability long lifetime aqueous medium.