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-β-CD(ttp))(tpySH)](PF6)2. The complexes bear a surface active thiol group and a recognition unit which is either a β-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 tpySCH2Stpy is prepared and its dinuclear Ru(II) complexes are reported, (4) [(ttp)Ru(tpyS CH2Stpy)Ru(ttp)]+2, (5) [(biptpy)Ru(tpySCH2Stpy)Ru(bitpy)]+2, (6) [(pm-β-CD(ttp))Ru(tpySCH2 Stpy)Ru(pm-β-CD(ttp))]+2. The complexes show characteristic red 3MLCT luminescence which is much stronger than their analogous mononuclear counterparts.
Original language | English |
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Pages (from-to) | 115-127 |
Number of pages | 13 |
Journal | Supramolecular Chemistry |
Volume | 19 |
Issue number | 1-2 |
Early online date | 2 Apr 2007 |
DOIs | |
Publication status | Published - 2007 |
Keywords
- luminescence
- cyclodextrin
- surface active metal complexes
- electrochemistry