Synthesis, H- or J-type aggregations, electrochemistry and in situ spectroelectrochemistry of metal ion sensing lead(II) phthalocyanines
摘要:
We report, in this study, peripherally 3- and 4-substituted functionalized ionophore ligands (1-3) and their alpha- and beta-tetra polyalcohol substituted lead(II) phthalocyanines M{Pc[S-CH(C3H7)(C2FH5OH)](4)} (7, 9 and 11) and M{Pc(S-C6H12(OH)](4)) (8. 10 and 12) which are a mixture of different isomers. The complexes have been fully characterized by elemental analysis, FT-IR, H-1 NMR, C-13 NMR, MS (MALDI-TOF) and UV-Vis spectral data. These complexes induced H-type (face-to-face fashion) on-aggregate (edgeto-edge) dimers when titrated with AgNO3 or Na2PdCl4 in a THF-MeOH solution. Cyclic and square wave voltammetry studies showed that the complexes gave three one-electron ligand-based reductions and two one-electron oxidation couples having diffusion controlled mass transfer character. Assignments of these redox couples were confirmed by spectroelectrochemical measurements. The observation of split Q bands, which are characteristic spectral behavior of metal-free phthalocyanines, indicates demetallization of the complexes during the spectroelectrochemical measurement under the applied potentials. The types of the substituents on the ring of the phthalocyanines affect the demetallization process of the complexes. (C) 2010 Elsevier Ltd. All rights reserved.
Peripheral and non-peripheral-designed multifunctional phthalocyanines; synthesis, electrochemistry, spectroelectrochemistry and metal ion binding studies
on the periphery of the phthalocyanines. The cation binding properties of the complexes, for example using AgI and PdII, were evaluated by UV–Vis spectroscopy and the results show the formation of polynuclear phthalocyaninecomplexes. Functional donors on the periphery of the zinc and copper complexes coordinate to AgI and PdII to give ca. a 2:1 metal–phthalocyanine complex binding ratio for the concentration
Synthesis, H- or J-type aggregations, electrochemistry and in situ spectroelectrochemistry of metal ion sensing lead(II) phthalocyanines
作者:Armağan Günsel、Meryem N. Yaraşir、Mehmet Kandaz、Atıf Koca
DOI:10.1016/j.poly.2010.09.035
日期:2010.12
We report, in this study, peripherally 3- and 4-substituted functionalized ionophore ligands (1-3) and their alpha- and beta-tetra polyalcohol substituted lead(II) phthalocyanines MPc[S-CH(C3H7)(C2FH5OH)](4)} (7, 9 and 11) and MPc(S-C6H12(OH)](4)) (8. 10 and 12) which are a mixture of different isomers. The complexes have been fully characterized by elemental analysis, FT-IR, H-1 NMR, C-13 NMR, MS (MALDI-TOF) and UV-Vis spectral data. These complexes induced H-type (face-to-face fashion) on-aggregate (edgeto-edge) dimers when titrated with AgNO3 or Na2PdCl4 in a THF-MeOH solution. Cyclic and square wave voltammetry studies showed that the complexes gave three one-electron ligand-based reductions and two one-electron oxidation couples having diffusion controlled mass transfer character. Assignments of these redox couples were confirmed by spectroelectrochemical measurements. The observation of split Q bands, which are characteristic spectral behavior of metal-free phthalocyanines, indicates demetallization of the complexes during the spectroelectrochemical measurement under the applied potentials. The types of the substituents on the ring of the phthalocyanines affect the demetallization process of the complexes. (C) 2010 Elsevier Ltd. All rights reserved.