The cations tested were Li, K, Mg, Ni, Cd, and Pb (added as perchlorate salts) and Na, Ca, Cu, Zn, and Hg (added as triflate salts). The anions tested were F−, Cl−
- J. Chem.Eur
- Br−, AcO−,
Fluorescent solid 5-pyridylimidazobenzothiadiazole displays a remarkable solvatofluorochromism and with Zn(AcO)2 and Cd(AcO)2, either in solution or under solvent-free conditions, forms ion-pair complexes that in the solid state can be discriminated and separated by fluorescence measurements and selective extraction with diethyl ether or chloroform.