کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1337536 | 979633 | 2009 | 10 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Synthesis, in situ spectroelectrochemical, in situ electrocolorimetric and electrocatalytic investigation of brown-manganese phthalocyanines Synthesis, in situ spectroelectrochemical, in situ electrocolorimetric and electrocatalytic investigation of brown-manganese phthalocyanines](/preview/png/1337536.png)
α- and β-substituted tetrakis(6-hydroxyhexylthiol) phthalocyaninato manganese (III) chloride complexes have been prepared via cyclotetramerization. Both complexes have been characterized by elemental analysis, FTIR, MS and UV–Vis spectral data. The voltammetric and in situ spectroelectrochemical studies reveal that both complexes exhibit an oxidation and three reduction processes having reversible, one-electron, and diffusion controlled mass transfer characteristics, which are assigned to MnIIIPc2−/MnIVPc2−, MnIIIPc2−/MnIIPc2−, MnIIPc2−/MnIPc2−, and MnIPc2−/MnIPc3− couples respectively. The existence of oxygen in solution significantly affects the in situ spectroelectrochemical behavior of the complexes due to the formation of μ-oxo MnPc species. An in situ electrocolorimetric method has been applied to investigate the colors of the electro-generated anionic and cationic forms of the complexes for the first time in this study. The complexes, coated on a glassy carbon electrode potentiostatically, show considerable high electrocatalytic activity to hydrogen evolution reactions in aqueous solution.
α- and β-substituted tetrakis{6-hydroxyhexylthiol)phthalocyaninato manganese (III) chloride complexes have been prepared via cyclotetramerization and characterized by elemental analysis, FTIR, MS and UV–Vis spectral data. The voltammetric and in situ spectroelectrochemical studies of the complexes reveal that both complexes exhibit an oxidation and three reduction processes having reversible, one-electron, and diffusion controlled mass transfer characters, which are assigned to MnIIIPc2−/MnIIPc2−, MnIIPc2−/MnIPc2−, MnIPc2−/MnIPc3− and MnIIIPc2−/MnIVPc2− couples respectively. Existence of oxygen in solution significantly affects the in situ spectroelectrochemical behaviors of the complexes due to the formation of μ-oxo MnPc species. An in situ electrocolorimetric method has been applied to investigate the colors of the electro-generated anionic and cationic forms of the complexes for the first time in this study. The complexes coated on a glassy carbon electrode potentiostatically show considerably high electrocatalytic activity to the hydrogen evolution reaction in aqueous solution.Figure optionsDownload as PowerPoint slide
Journal: Polyhedron - Volume 28, Issue 14, 23 September 2009, Pages 2933–2942