Fe 3+ ion and hydrogen peroxide (H 2 O 2 ) have attracted tremendous research interests in the field of analytical chemistry, due to their vast area of use. We report herein the design of fluorescence sensor with dual performance toward detection of H 2 O 2 and Fe 3+ utilizing a novel oligo N-phenylpyrrole (ONPP) derivative. ONPP was synthesized using the oxidation of Nphenylpyrrole by Cu 2+ as a mild oxidant agent. The fluorescence of ONPP could be selectively quenched by Fe 3+ ion, resulting in a recognition platform for Fe 3+ ion. The quenching of ONPP emission by Fe 3+ was also applied as a strategy for design of a H 2 O 2 fluorescence sensor based on the oxidative generation of Fe 3+ by H 2 O 2 in the presence of optimized concentration of Fe 2+ ion in solution. The developed fluorescence sensor provides a simple and cost effective approach for detection of Fe 3+ and H 2 O 2 traces with linear ranges of 0.2-6.1 and 0.1-0.57 µmol L -1 and detection limits of 0.17 and 0.03 µmol L -1 , respectively. The results of this research will open up new vistas in the synthesis of fluorescent oligomer materials and their application for development of sensitive, simple, low cost and reliable sensing platforms with versatile performance.
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