Developing a Novel Nanoscale Porphyrinic Metal–Organic Framework: A Bifunctional Platform with Sensitive Fluorescent Detection and Elimination of Nitenpyram in Agricultural Environment

• DOI: 10.1021/acs.jafc.0c01313
• Publication Date: 2020-04-29T19:10:39Z
• Authors: Jintong Liu; Wei Hong Xiong; Lin Yao Ye; Wen Sheng Zhang; Hong Yang
• Keywords: 2. Zero hunger; Light; 02 engineering and technology; Catalysis; Fluorescence; Nanostructures; 12. Responsible consumption; Neonicotinoids; Limit of Detection; Luminescent Measurements; Soil Pollutants; Pesticides; 0210 nano-technology; Metal-Organic Frameworks

Developing a rapid sensing platform with effective pesticide degradation capabilities integrated into a single structure and realistic application is an imminent challenge to ensure sustainable agriculture and food safety. Here, we described establishment of a bifunctional nanoscale porphyrinic metal-organic framework (MOF) probe serving as a sensor for detection of trace nitenpyram and as a photocatalyst to facilitate the pesticide degradation. Based on the signal turned "on-off", the strong fluorescence of the probe was quenched by the target, leading to the sensing range from 0.05 to 10.0 μg mL-1 and a detection limit of 0.03 μg mL-1. Given the versatile design by which the porphyrin photosensitizers were isolated subtly in the MOF to avoid self-quenching, the probe was endowed with sustainable and efficient pesticide photodegradation activity with a degradation rate of ∼95% for nitenpyram. Our work represents powerful all-in-one MOF-derived materials jointly for sensing and degrading pesticide residues in agricultural soils and other pesticide-contaminated environments.