G. Ulrich et al., EPR DETECTION OF ALKALI-METAL CATIONS USING NOVEL SPIN-LABELED MACROCYCLIC SENSORS, Chemical communications, (21), 1996, pp. 2461-2462
The efficacy with which polyazamacrocycles grafted with multiple nitro
nyl nitroxide spin labels function as EPR-active sensors for metal cat
ions depends upon the ability of the cation to disrupt spin-spin excha
nge interactions between adjacent radical centres.