Multiporous Terbium Phosphonate Coordination Polymer Microspheres as Fluorescent Probes for Trace Anthrax Biomarker Detection
journal contributionposted on 05.04.2019, 00:00 by Yongquan Luo, Lei Zhang, Lingyi Zhang, Bohao Yu, Yajie Wang, Weibing Zhang
Lanthanide coordination polymers have been recently regarded as attractive sensing materials because of their selectivity, high sensitivity, and rapid response ability. In this research, the multiporous terbium phosphonate coordination polymer microspheres (TbP-CPs) were prepared as a novel fluorescent probe, which showed a fluorescence turn-on response capability for the detection of the trace anthrax biomarker dipicolinate acid (DPA). The morphology and chemical composition of as-prepared TbP-CPs were characterized in detail. The TbP-CPs have the vegetable-flower-like structure and microporous surface. In addition, the as-prepared TbP-CPs not only possess the merits of convenience and simple preparation with high yield but also have the excellent characters as fluorescent probes, such as high stability, good selectivity, and rapid detection ability within 30 s. This proposed sensor could detect DPA with a linear relationship in concentrations ranging from 0 to 8.0 μM and a high detection sensitivity of 5.0 nM. Furthermore, the successful applications of DPA detection in urine and bovine serum were demonstrated. As a result, the recovery ranged from 93.93–101.6%, and the relative standard deviations (RSD) were less than 5%.
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probeTrace Anthrax Biomarker Detection Lanthanide coordination polymersMultiporous Terbium Phosphonate Coordination Polymer Microspheres8.0 μ Mtrace anthrax biomarker dipicolinate acidsensitivitydetectionfluorescence turn-on response capabilityselectivityDPARSDmultiporous terbium phosphonate coordination polymer microspheresas-prepared TbP-CPs