| Autor: |
Barry DE; School of Chemistry and Trinity Biomedical Sciences Institute (TBSI), Trinity College Dublin, The University of Dublin, Dublin 2, Ireland. gunnlaut@tcd.ie barryd5@tcd.ie., Kitchen JA; Chemistry, School of Natural and Computational Sciences, Massey University, Auckland, New Zealand., Mercs L; School of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland., Peacock RD; School of Chemistry, University of Glasgow, Glasgow, G 12 8QQ, Scotland, UK., Albrecht M; School of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland., Gunnlaugsson T; School of Chemistry and Trinity Biomedical Sciences Institute (TBSI), Trinity College Dublin, The University of Dublin, Dublin 2, Ireland. gunnlaut@tcd.ie barryd5@tcd.ie. |
| Abstrakt: |
The lanthanide directed self-assembly of chiral amphiphilic 2,6-pyridinedicarboxylic acid based ligands 1 and 2 with various Ln(CF 3 SO 3 ) 3 (Ln = Tb III , Sm III , Lu III , Dy III ) salts was studied in CH 3 CN and evaluated with the expected 1 : 3 and 1 : 1 Ln : Ligand species forming in solution. Ligand chirality was retained and transferred, as depicted by circular dichroism (CD) and circularly polarised luminescence (CPL) measurements (for Tb III and Sm III ), to the lanthanide centre upon complexation with high dissymmetry factor values for the Sm III complexes obtained (g lum = -0.44 and 0.29 and 0.45 and -0.23 for the 4 G 5/2 → 6 H 5/2 and the 4 G 5/2 → 6 H 7/2 transitions of Sm·1 3 and Sm·2 3 , respectively). The ability of the complexes to form stable Langmuir monolayers at the air-water interface was also established while Langmuir-Blodgett films of Tb·L 3 and Sm·L 3 exhibited lanthanide luminescent emission. |
