Chemistry Letters, Vol.30, No.2, 100-101, 2001
A highly selective calix[4]arene-based chromoionophore for Ni2+
A novel chromoionophore 5,17-bis(quinolyl-8-azo)25,26,27,28-tetrahydroxycalix[4]arene has been synthesized as a highly selective reagent for Ni2+ in the presence of excess alkali, alkaline earth and other transition metal ions.