Anion detection by chromogenic chemosensors and reagents is an area of emerging interest in the field of supramolecular and anion chemistry. 1 However, despite remarkable advances, there are a large number of chromogenic probes that are reported to display sensing features only in organic solvents. In fact, the preparation of probes for certain target anions in pure water is still a challenge, since many receptor–anion interactions suffer from strong ...
