What is the role of nitrobenzene (NB) in the sensing experiments with lanthanide coordination polymers?

Label:chem

Topic
Nitrobenzene is a toxic industrial chemical, and its detection is important for environmental and public health safety. Lanthanide coordination polymers can be used as luminescent sensors to detect nitrobenzene.
Answer
Nitrobenzene (NB) acts as a target analyte in the sensing experiments. The lanthanide coordination polymers, particularly complexes 4 and 3, exhibit significant fluorescence quenching in the presence of nitrobenzene. This quenching effect is attributed to photoinduced electron transfer from the excited state of the coordination polymers to the electron-deficient nitrobenzene, enabling the detection of trace amounts of nitrobenzene.
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