Novel hexacentered phosphazene compound as selective Fe³⁺ ions sensor with high quantum yield: Synthesis and application

Abstract

A novel compound hexa-rhodamine substituted phosphazene (HRP) with six active centers on a cyclotriphosphazene ring was synthesized using the alkyne-azide “click” reaction. The structure of HRP was characterized using spectroscopic techniques. The optical sensor properties of HRP for metal ions were investigated using UV-Vis and Fluorescence spectroscopy. It was determined that HRP is a selective sensor with colorimetric and fluorescent properties for Fe³⁺ ions. Limit of detection (LOD) of HRP was determined as 6.94 × 10⁻⁹ M using fluorescence intensities in the presence of different concentrations of Fe³⁺ ions. It was determined that HRP-Fe³⁺ complex has high quantum yield and excellent photostability.

Graphical Abstract

Keywords:

• Fluorescent
• iron(III)
• phosphazene
• rhodamine
• sensor

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was financially supported by the Scientific and Technological Research Council of Turkey (TUBITAK, Project 112T278). Türkiye Bilimsel ve Teknolojik Araştirma Kurumu.