Organochalcogen-Supported Azacalix[3]arenes as Membrane Sensor for Potentiometric Determination of Uranyl Ions

Abstract

An one-pot syntheses of organochalcogen-supported azacalix[3]arenes and their behavior toward metal ions sensing was investigated by spectrochemical (UV-vis, ¹ H NMR and ⁷⁷ Se NMR) methods. The azacalix[3]arenes prepared have shown better potentiometric response for uranyl ions compared to alkali (Na⁺, K⁺), alkaline-earth (Mg ^{2 +} , Ca ^{2 +} , Ba ^{2 +} ), transition and heavy metal (Co ^{2 +} , Ni ^{2 +} , Cu ^{2 +} , Ag⁺, Zn ^{2 +} , Cd ^{2 +} , Pb ^{2 +} , Fe ^{3 +} ) ions and thus can act as efficient ion-carriers for the preparation of PVC membrane based ion-selective electrodes for the determination of uranyl ions.

Keywords:

• Azacalix[3]arenes
• host–guest systems
• ion-selective electrode
• O
• N
• Se/Te donor combinations
• potentiometric sensors
• uranyl ions