Portable and luminescent fiber based sensing device for antibiotics in human urine and real water samples

Abstract

A new lanthanide complex is designed and obtained based on the ligand of 2,4,5,6-tetrafluoroisophthalic acid (H2TFPA) and 1,10-phenanthroline (phen) under mild hydro(solvo)thermal conditions. The new complex has the molecular formula of [Tb2(TFBA)3(phen)2(H2O)2]n (TbMOF) and it is characterized in detail. It is confirmed that TbMOF shows high water stability, thermal stability, acid and alkali resistance. The experimental results show that TbMOF solid state sample shows a luminescence decay lifetime of 0.448 ms, and a high luminescence quantum yield (QY) of 38.15%. Interestingly, studies showed that TbMOF is an excellent sensor for detecting antibiotics of ciprofloxacin (CIP). In addition, the limit of detection (LOD) for CIP is an extremely high sensitivity value of 0.17 ppm. In the concentration range of 1.0 × 10−7-1.0 × 10−6 M, CIP shows an excellent linear relationship with the luminescence intensity of TbMOF. Most importantly, test paper based on TbMOF and fiber material of filter paper is fabricated, which is a strongly anti-interference, selective, sensitive, portable and visible to the naked eyes sensing device towards CIP in real samples of human urine, tap water, and lake water.