Designed Eu3+-functionalized nano-MOF fluorescence sensor for rapid recognition of oxytetracycline

A meticulously crafted nanoscale fluorescence sensor, featuring Eu 3+ -functionalized ZIF-8 (Eu 3+ @ZIF-8), has been triumphantly synthesized utilizing a streamlined and effective process. This fluorescence sensor ingeniously harnesses the robust complexation between oxytetracycline (OTC) and Eu 3+ ions within Eu 3+ @ZIF-8, markedly augmenting the characteristic fluorescence of Eu 3+ via an exquisite antenna effect. This enhancement facilitates ultrasensitive fluorescence-based sensing of OTC. This groundbreaking application introduces a novel paradigm for OTC detection, accompanied by an exhaustive elaboration on the potential mechanism underlying OTC testing. The Eu 3+ @ZIF-8 fluorescence sensor stands as an exemplary advanced tool for OTC detection, evidenced by its remarkable attributes: swift response, unparalleled selectivity, and exquisite sensitivity. Its application in detecting spiked OTC in environmental samples, such as lake water and tap water, has demonstrated impeccable performance, validating its reliability and presenting a versatile platform technology with vast potential for environmental monitoring.