Metal-ion sensing and aggregation studies on reactive phthalocyanines bearing soft-metal receptor moieties; synthesis, spectroscopy and electrochemistry

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• 作者：Meryem N. Yarasir ; Mehmet K ; az ; B. Filiz Senkal ; Atı ; f Koca ; Bekir Salih
• 关键词：Phthalocyanine ; Metal-free ; Copper ; Silver ; Palladium ; Ion receptor ; Maldi-TOF ; Electrochemistry
• 刊名：Polyhedron
• 出版年：2007
• 期刊代码：87_02775387
• 类别：ch
• 出版时间：20 November 2007
• 卷：26
• 期：18
• 页码：5235-5242
• 文件大小：457 K

摘要

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 Ag^I, Pd^II, Hg^II, Pb^II and Cd^II 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.