Analysis of spectral properties of stilbazolium merocyanine complexes with Fe(II) and Fe(III) ions

摘要

The potential use of merocyanine dye (1(12-hydroxydodecyl)-4-[(3-hydroxy-4-oxocyclohexa-2,5-dienylidene)-ethylidene]-1,4-dihydropyridine) was investigated as an effective monitoring tool for the presence of the free iron ions. We show that merocyanine forms stable complexes with both Fe~(2+) and Fe~(3+) ions provided that the pH level is maintained at 10. Only the basic form of merocyanine was capable of forming these complexes between merocyanine and iron ions demonstrated some features of charge-transfer complexes and did not dissociate in the presence of water.