Abstract
A brief summary of representative fluorescent chemosensors based on conjugated polymers with N-heterocyclic moieties, followed by a discussion on the limitations and challenges of current systems, as well as possible future research directions.
Highlights
Sensors provide a communication interface between humans and the surrounding world
Over the past more than two decades of time, significant progress has been achieved in the research of π-conjugated polymer-based fluorescent sensors, especially for the ones containing aromatic N-heterocyclic moieties. (i) Thanks to the significant signal amplifying activity or molecular wire effect, they usually displayed ultrahigh sensitivity to the analytes with the detection limit in the micro- to nanomolar or even picomolar range
To interact with transition/heavy metal ions, the Stern–Volmer quenching constant (KSV) could be as high as 105–109 M−1, much higher than those of the chemical sensors based on small molecules
Summary
Sensors provide a communication interface between humans and the surrounding world. To perceive external signals, during the long period of evolution, the human body has formed five sets of sensors, that is nose, tongue, eyes, ears, and skin.[1]. Like any other analytical tools, the ease of use, high accuracy, and acceptable reproducibility of the results are expected from the sensors.[9] Among various fluorescent chemosensors from different materials, π-conjugated polymer (CP)-based sensors have attracted much attention as they can be used to detect a variety of environmental pollutants and bioactive compounds, owing to their amplified detection sensitivity. He received his PhD degree in Polymer Chemistry from the Technology of China (2012). Due to the characteristics of these heterocycles, metal ions are the main analytes of interest, with protons, anions and other biomolecules as the targets of detection, to a lesser extent
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