Dye responsive optical-electrochemical-wettability on a naphthalene-appended calix[4]arene clicking surface

A novel chemosensor for Methylene Green (MG) based on naphthalene-appended calix[4]arene (NAC4) clicking surface has been reported. Multisignaling changes were observed through fluorescence spectroscopy (FL), electrochemical impedance spectroscopy (EIS) and contact angle (CA). The impedance reduced and contact angle changes from hydrophobic to hydrophilic when the NAC4 functional interface treated with MG. Meanwhile, FL intensity of NAC4 was decreased obviously. The proposed optical-electrochemical-wettability sensing devices display a remarkable specificity, intuitive and convenient method for MG detection, which provided a new opportunity for the production of MG recognition chips that can be used in the fields of biology and environmental monitoring.