A white-light-emitting sensor array based on cucurbit[8]uril for quantitative detection of multicomponent...

Area of Science:

• Supramolecular Chemistry
• Analytical Chemistry
• Environmental Science

Background:

• Nitroaniline isomers are common environmental pollutants.
• Developing selective and sensitive detection methods is crucial.
• Supramolecular complexes offer unique sensing capabilities.

Purpose of the Study:

• To construct a dual-channel white-light array sensor for nitroaniline isomer detection.
• To evaluate the sensor's ability to identify and quantify p-, m-, and o-nitroaniline.
• To demonstrate the sensor's applicability in real-world samples.

Main Methods:

• Assembly of a white-light-emitting supramolecular complex.
• Construction of a dual-channel white-light array sensor.
• Utilizing fluorescence quenching and Linear Discriminant Analysis (LDA).

Main Results:

• The sensor exhibited distinct fluorescence responses to different nitroaniline isomers.
• LDA successfully distinguished and classified mixtures of nitroaniline isomers.
• A low limit of detection (LOD) of 0.7 μM was achieved.
• Qualitative detection in river water and rice seedling extract was successful.

Conclusions:

• The developed supramolecular white-light array sensor is effective for detecting nitroaniline isomers.
• The sensor demonstrates good selectivity, sensitivity, reproducibility, and stability.
• This platform provides an ideal foundation for developing advanced multiresponse sensors for environmental monitoring.