Interpenetration-Dependent Luminescent Probe in Indium-Organic Frameworks for Selectively Detecting Nitrofurazone in Water

Two novel anionic In-MOFs V101 and V102 were synthesized and structurally characterized.
The structrual
transformation from 2-fold interpenetration to noninterpenetration
was completed by changing solvent from DMF to DEF. Luminescence investigations
reveal that only V102 not V101 can sensitively
and selectively detect traces of antibiotics nitrofurazone in water
solution via an environmentally friendly manner, and the detection
limit can reach to 0.2 ppm. The luminescent difference between V101 and V102 mainly originates from the divergence
of interpenetration structures. Namely, through interpenetration-control,
the luminescent probe can switch on or off to detect nitrofurazone.
This is the first example of interpenetration-dependent MOFs-based
luminescent probe.

本研究合成了两种新型阴离子型铟基金属有机骨架（In-MOFs）材料V101与V102，并完成了结构表征。
通过将溶剂从N,N-二甲基甲酰胺（DMF）更换为N,N-二乙基甲酰胺（DEF），成功实现了材料从二重互穿结构到非互穿结构的结构转变。
发光性能研究显示，仅V102而非V101可通过环境友好的方式，在水溶液中灵敏且选择性地检测痕量抗生素呋喃西林，其检测限可低至0.2 ppm。
V101与V102的发光性能差异主要源于二者互穿结构的不同。即通过调控互穿结构，可实现发光探针的“开启-关闭”切换，以此完成对呋喃西林的检测。
本研究为首例依赖互穿结构的MOFs基发光探针。