کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9770389 1501947 2005 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Ground vs. excited state interaction in ruthenium-thienyl dyads: implications for through bond interactions in multicomponent systems
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Ground vs. excited state interaction in ruthenium-thienyl dyads: implications for through bond interactions in multicomponent systems
چکیده انگلیسی
The vibrational and photophysical properties of mononuclear ruthenium(II) and ruthenium(III) polypyridyl complexes based on the ligands 2-(5′-(pyridin-2″-yl)-1′H-1′,2′,4′-triaz-3′-yl)-thiophene, 2-(5′-(pyrazin-2″-yl)-1′H-1′,2′,4′-triaz-3′-yl)-thiophene, are reported. The effect of the introduction of the non-innocent thiophene group on the properties of the triazole based ruthenium(II) complex is examined. The pH sensitive 1,2,4-triazole group, although influenced by the electron withdrawing nature of the thiophene group, does not facilitate excited state interaction of the thiophene and Ru(II) centre. Deuteriation and DFT calculations are employed to enable a deeper understanding of the interaction between the two redox-active centres and rationalise the difference between the extent of ground and excited state interaction in this simple dyad. The results obtained provide considerable evidence in support of earlier studies examining differences in ground and excited state interaction in multinuclear thiophene-bridged systems, in particular with respect to HOMO- and LUMO- mediated superexchange interaction processes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Structure - Volumes 735–736, 14 February 2005, Pages 123-134
نویسندگان
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