Integration of Metal-Organic Polyhedra onto a Nanophotonic Sensor for Real-Time Detection of Nitrogenous Organic Pollutants in Water
ACS applied materials & interfaces(2023)
摘要
The grave healthand environmental consequences of waterpollutiondemand new tools, including new sensing technologies, for the immediatedetection of contaminants in situ. Herein, we report the integrationof metal-organic cages or polyhedra (MOCs/MOPs) within a nanophotonicsensor for the rapid, direct, and real-time detection of small (<500Da) pollutant molecules in water. The sensor, a bimodal waveguidesilicon interferometer incorporating Rh(II)-based MOPs as specificchemical receptors, does not require sample pretreatment and enablesminimal expenditure of time and reagents. We validated our sensorfor the detection of two common pollutants: the industrial corrosioninhibitor 1,2,3-benzotriazole (BTA) and the systemic insecticide imidacloprid(IMD). The sensor offers a fast time-to-result response (15 min),high sensitivity, and high accuracy. The limit of detection (LOD)in tap water for BTA is 0.068 & mu;g/mL and for IMD, 0.107 & mu;g/mL,both of which are below the corresponding toxicity thresholds definedby the European Chemicals Agency (ECHA). By combining innovative chemicalmolecular receptors such as MOPs with state-of-the-art photonic sensingtechnologies, our research opens the path to implement competitivesensor devices for in situ environmental monitoring.
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关键词
metal-organicpolyhedra,nanophotonic sensor,interferometer,benzotriazole,imidacloprid,environmentalmonitoring
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