Selective chromogenic reagents based upon phenolic cryptands
作者:Alastair F. Sholl、Ian O. Sutherland
DOI:10.1039/c39920001716
日期:——
Chloroform solutions of the chromoionophore 4c, which has been synthesised by a simple procedure from diaza-15-crown-5 2a, extract lithium cations from aqueous solutions in the pH range 7–8 with very high selectivity as compared with the extraction of sodium, potassium, magnesium and calcium; the related reagent 5 shows moderate selectivity for sodium.