dc.contributor.author
Hohloch, Stephan
dc.contributor.author
Schweinfurth, David
dc.contributor.author
Sommer, Michael G.
dc.contributor.author
Weisser, Fritz
dc.contributor.author
Deibel, Naina
dc.contributor.author
Ehret, Fabian
dc.contributor.author
Sarkar, Biprajit
dc.date.accessioned
2018-06-08T04:13:50Z
dc.date.available
2015-03-02T13:21:25.003Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/16857
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-21038
dc.description.abstract
The compounds [Ru(bpy)2(L1)](ClO4)2 (1(ClO4)2), [Ru(bpy)2(L2)](ClO4)2
(2(ClO4)2), [Ru(bpy)2(L3)](ClO4)2 (3(ClO4)2), [Ru(bpy)2(L4)](ClO4)2
(4(ClO4)2), [Ru(bpy)2(L5)](ClO4)2 (5(ClO4)2), and
[Ru(bpy)2(L6)](ClO4)26(ClO4)2 (bpy = 2,2′-bipyridine, L1 = 1-(4-isopropyl-
phenyl)-4-(2-pyridyl)-1,2,3-triazole, L2 = 1-(4-butoxy-
phenyl)-4-(2-pyridyl)-1,2,3-triazole, L3 = 1-(2-trifluoromethyl-
phenyl)-4-(2-pyridyl)-1,2,3-triazole, L4 = 4,4′-bis-{1-(2,6-diisopropyl-
phenyl)}-1,2,3-triazole, L5 = 4,4′-bis-{(1-phenyl)}-1,2,3-triazole, L6 =
4,4′-bis-{1-(2-trifluoromethyl-phenyl)}-1,2,3-triazole) were synthesized from
[Ru(bpy)2(EtOH)2](ClO4)2 and the corresponding “click”-derived pyridyl-
triazole or bis-triazole ligands, and characterized by 1H-NMR spectroscopy,
elemental analysis, mass spectrometry and X-ray crystallography. Structural
analysis showed a distorted octahedral coordination environment about the
Ru(II) centers, and shorter Ru–N(triazole) bond distances compared to
Ru–N(pyridine) distances in complexes of mixed-donor ligands. All the
complexes were subjected to cyclic voltammetric studies, and the results were
compared to the well-known [Ru(bpy)3]2+ compound. The oxidation and reduction
potentials were found to be largely uninfluenced by ligand changes, with all
the investigated complexes showing their oxidation and reduction steps at
rather similar potentials. A combined UV-vis-NIR and EPR
spectroelectrochemical investigation, together with DFT calculations, was used
to determine the site of electron transfer in these complexes. These results
provided insights into their electronic structures in the various investigated
redox states, showed subtle differences in the spectroscopic signatures of
these complexes despite their similar electrochemical properties, and provided
clues to the unperturbed redox potentials in these complexes with respect to
ligand substitutions. The reduced forms of the complexes display structured
absorption bands in the NIR region. Additionally, we also present new
synthetic routes for the ligands presented here using Cu-abnormal carbene
catalysts.
en
dc.rights.uri
http://www.rsc.org/AboutUs/Copyright/LicencetoPublishforjournals.asp
dc.subject.ddc
500 Naturwissenschaften und Mathematik::540 Chemie
dc.title
The redox series [Ru(bpy)2(L)]n, n = +3, +2, +1, 0, with L = bipyridine,
“click” derived pyridyl-triazole or bis-triazole: a combined structural,
electrochemical, spectroelectrochemical and DFT investigation
dc.type
Wissenschaftlicher Artikel
dcterms.bibliographicCitation
Dalton Trans. - 43 (2014),11 , S. 4437-4450
dcterms.bibliographicCitation.doi
10.1039/C3DT52898G
dcterms.bibliographicCitation.url
http://pubs.rsc.org/en/Content/ArticleLanding/2014/DT/C3DT52898G#!divAbstract
refubium.affiliation
Biologie, Chemie, Pharmazie
de
refubium.mycore.fudocsId
FUDOCS_document_000000021941
refubium.resourceType.isindependentpub
no
refubium.mycore.derivateId
FUDOCS_derivate_000000004598
dcterms.accessRights.openaire
open access