کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
27018 43994 2014 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis, electrochemistry and photo-induced electron transfer of unsymmetrical dinuclear ruthenium osmium 2,2′-bipyridine complexes
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بیو مهندسی (مهندسی زیستی)
پیش نمایش صفحه اول مقاله
Synthesis, electrochemistry and photo-induced electron transfer of unsymmetrical dinuclear ruthenium osmium 2,2′-bipyridine complexes
چکیده انگلیسی


• Unsymmetrical heteronuclear Os–Ru complexes were synthesized.
• Supramolecular system of heteronuclear Os(bpy)3-viologen-Ru(bpy)3⊂CB[7] has been studied.
• CB[7] preferred to bind on butyl chain of Os side in acetonitrile solution.
• Photo-induced electron transfer of unsymmetrical dinuclear complexes was studied by UV-vis spectrophotometer.

Four unsymmetric dinuclear ruthenium and osmium complexes, Os(bpy)3-viologen-Ru(bpy)3 (1; bpy = 2,2′-bipyridyl), Ru(bpy)3-viologen-Ru(bpy)(dcbpy)2 (2; dcbpy = 4,4′-dicarboxyl-2,2-bipyridyl), Os(bpy)3-viologen-Ru(bpy)(dcbpy)2 (3) and rotaxane 1⊂CB[7] (CB[7] = cucurbit[7]uril), were successfully synthesized. The NMR, electrochemistry and photochemistry studies of these complexes were performed in non-aqueous solutions. The results show that the CB[7] host mainly locates at the butyl linker part of the osmium side in an acetonitrile solution. This binding lowers the oxidation potential of osmium whereas the oxidation potential of ruthenium does not change. The oxidation potential of ruthenium in complexes 2 and 3 is higher due to the electron withdrawing property of carboxylic anchor groups. Analysis with UV–vis spectra shows the viologen radical formation and reversed process of these complexes in non-aqueous solutions.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 287, 1 August 2014, Pages 40–48
نویسندگان
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