UiO-66-NDC (1,4-naphthalenedicarboxilic acid) as a novel fluorescent probe for the selective detection of Fe3+

Abstract

The development of a simple fluorescent sensor for detecting metal ions is fundamentally essential. Some metal-organic frameworks exhibit excellent photoluminescence properties associated with metal ions. Herein, we synthesized a new naphthalene-substituted UiO-66 analog (UiO-66-NDC) by the solvothermal method using 1,4-naphthalenedicarboxilic acid as the organic linker. Due to UiO-66-NDC has excellent photoluminescence property and good dispersibility, we explored the potential application of UiO-66-NDC in fluorescence sensing. The results show that UiO-66-NDC not only featured different fluorescent response ability for some small-molecule solvents but also exhibited significant selectivity to several different metal ions. In particular, Fe3+ ions could cause serious fluorescence quenching of UiO-66-NDC in N,N-dimethylformamide (DMF). The sensing detection for different Fe3+ ions concentrations was performed at room temperature, and the results indicated that UiO-66-NDC can be utilized as an excellent fluorescent probe for sensing Fe3+ ions.