Multiporous Terbium Phosphonate Coordination Polymers Microspheres as Fluorescent Probe for Trace Anthrax Biomarker Detection.
ACS applied materials & interfaces(2019)
摘要
Lanthanide coordination polymers (LnCPs) have recently regarded as the attractive sensing materials because of its selectivity, high sensitivity and rapid response ability. In this research, the multiporous terbium phosphonate coordination polymers microspheres (TbP-CPs) were prepared as the novel fluorescent probe, which showed a fluorescence turn-on response capability for the detection of trace anthrax biomarker, dipicolinate acid (DPA). The morphology and chemical composition of as-prepared TbP-CPs were detailedly characterized. 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 probe such as high stability, good selectivity and rapid detection ability within 30 seconds. This proposed sensor could detect DPA with a linear relationship in the concentrations range 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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关键词
Coordination Polymers,Terbium Phosphonate,Fluorescent Probe,Dipicolinate Acid,Biomarker
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