Pyrrole-Based Anion Sensors, Part I: Colorimetric Sensors.

This chapter focuses on chemo-sensing aspects of pyrrole and oligopyrrole-based colorimetric receptors for anions. Since pyrroles can play the role of a receptor as well as a signal transducer very efficiently and because of the focus on anion sensing, they can be organized following the modes of signal transduction such as colorimetry, fluorescence, and electrochemistry rather than structural features of the receptors. This chapter focuses on colorimetric sensors and in particular those based on pyrrole, polypyrrole, and pyrrole benzo-analogs, i.e., indole and carbazole-based sensors for anions. [ABSTRACT FROM AUTHOR]