Synthesis, Characterization, and Naked-Eye Sensor Application of Fully Substituted Urea-Based Cyclotriphosphazene Compound

GRAPHICAL ABSTRACT

Abstract

A novel sensor with a hexacenter containing nitrophenylurea groups on a cyclotriphosphazene core was synthesized by “click” reaction of N-propargyl-substituted urea with a hexaazide-substituted cyclotriphosphazene compound. It was characterized by spectroscopic techniques such as Fourier transform infrared spectroscopy, nuclear magnetic resonance, and mass spectroscopy. This compound was used for naked-eye and spectrophotometric detection of F⁻ anions. The optical sensor properties of compound were investigated using ultraviolet–visible spectroscopy.

Keywords:

• Phosphazene
• naked-eye sensor
• urea
• hexapodal compound
• fluoride anion