Metal-ion sensing and aggregation studies on reactive phthalocyanines bearing soft-metal receptor moieties; synthesis, spectroscopy and electrochemistry
By Yarasir, Meryem N.; Kandaz, Mehmet; Senkal, B. Filiz; Koca, Atif & Salih, Bekir
Published in Polyhedron
NULL
2007
Abstract
Tetrasubstituted metal-free {2H[Pc(S(CH2)6OCOC4H3S)4]} and copperphthalocyanine {Cu[Pc(S(CH2)6OCOC4H3S)4]}, bearing thiophene-2-carboxylate-hexylthio moieties, have been prepared as isomeric mixtures via cyclo-tetramerization. Both new compounds have been characterized by elemental analysis, FTIR, 1H and 13C NMR, MS (Maldi-TOF) and UV–Vis spectral data. The cation binding abilities of the functional phthalocyanines with AgI, PdII, HgII, PbII and CdII are evaluated by a monomer–oligomer formation technique with UV–Vis spectroscopy. Spectroscopic properties of the complexes were affected strongly by the electron-donating sulfanyl units on the periphery. Cyclic voltammetry and differential pulse voltammetry studies show that both compounds give up to three ligand-based reduction processes and one ligand-based oxidation process having diffusion-controlled one-electron transfer properties.
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