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Surface-active mononuclear and dinuclear Ru(II) complexes based on thio-substituted terpyridines bearing cyclodextrin recognition units

Pereira Silva, Maria Jose J., Bertoncello, Paolo, Daskalakis, Nikolaos N, Spencer, Neil, Kariuki, Benson, Unwin, Patrick R. and Pikramenou, Zoe 2007. Surface-active mononuclear and dinuclear Ru(II) complexes based on thio-substituted terpyridines bearing cyclodextrin recognition units. Supramolecular Chemistry 19 (1-2) , pp. 115-127. 10.1080/10610270601026578

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Abstract

Ruthenium(II) surface active complexes based on a tpySH ligand have been prepared and characterised, (1) [Ru(tpyada)(tpySH)](PF6)(2), (2) [Ru( biptpy)(tpySH)](PF6)(2) and (3) [Ru(pm-beta-CD( ttp))( tpySH)](PF6)(2). The complexes bear a surface active thiol group and a recognition unit which is either a beta-cyclodextrin or a hydrophobic tail (adamantyl- or biphenyl) in order to utilise cyclodextrin recognition for the formation of supramolecular wires using bottom up approaches. Monolayers of [Ru(tpyada)( tpySH)](PF6)(2) on ITO surfaces are studied by electrochemical techniques. Detailed NMR analysis of tpySH reveals the presence of two tautomers, an "NH" and an "SH" form. The X-ray crystal structure of the oxidised form of the ligand tpySStpy is reported. A new ligand tpySCH(2)Stpy is prepared and its dinuclear Ru(II) complexes are reported, (4) [(ttp) Ru(tpySCH(2) Stpy) Ru(ttp)](+)2, (5) [(biptpy) Ru(tpySCH(2)Stpy) Ru (bitpy)](+)2, (6) [(pm-beta-CD(ttp)) Ru(tpySCH(2) Stpy) Ru(pm-beta-CD( ttp))](+2). The complexes show characteristic red 3 MLCT luminescence which is much stronger than their analogous mononuclear counterparts.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Subjects: Q Science > QD Chemistry
Publisher: Taylor & Francis
ISSN: 1061-0278
Last Modified: 04 Jun 2017 04:59
URI: http://orca-mwe.cf.ac.uk/id/eprint/47170

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