Ionoelectronics: Cooperative complexation properties of a functionalized crown ether substituted phthalocyanine

Phthalocyanine and lutetium bisphthalocyanine derivatives functionalized wi th crown - ether moieties and a carboxylic eater terminated side chain, are synthesized and characterized. The complexation properties towards potassi um ion are studied by UV - visible absorption spectrometry. A procedure is defined to quantitatively determine the positive cooperative effect arising during the complexation processes.