Azobenzene-based colorimetric chemosensors for rapid naked-eye detection of mercury(II).

@article{Cheng2011AzobenzenebasedCC,
  title={Azobenzene-based colorimetric chemosensors for rapid naked-eye detection of mercury(II).},
  author={Xiaohong Cheng and QianQian Li and Conggang Li and Jingui Qin and Zhen Li},
  journal={Chemistry},
  year={2011},
  volume={17 26},
  pages={7276-81}
}
Two new highly selective colorimetric chemosensors for Hg(2+), based on azobenzene and highly selective Hg(2+)-promoted deprotection of a dithioacetal have been designed and synthesized. In the presence of as little as 20 μM Hg(2+), the sensors change their color from light yellow to deep red, which can easily be observed by the naked eye. The underlying signaling mechanism is intramolecular charge transfer (ICT). The sensors have good selectivity for Hg(2+) with respect to several common… CONTINUE READING