I. Gurol et V. Ahsen, Synthesis and aggregation behaviour of phthalocyanines substituted with flexible crown ether, J PORPHYR P, 4(6), 2000, pp. 620-625
The synthesis of metal-free and metallo derivatives (Ni, Zn) of tetrasubsti
tuted phthalocyanines (Pcs) obtained from 4-[methyleneoxy(d15-crown-5)]phth
alonitrile is described. The new compounds have been characterized by eleme
ntal analyses, IR,H-1 and C-13 NMR, MS and UV-vis. The thermal stabilities
of the compounds were determined by thermogravimetric analysis. The alkali
metal ions bound to crown ether groups force dimerization of the phthalocya
nine units in solution, as observed in the electronic spectra by the broade
ning of the Q band transition at 675 Nn. The highest affinity for potassium
ion was observed in the case of the NiPc derivative in solvent extraction
experiments. Copyright (C) 2000 John Wiley & Sons, Ltd.