Article ID Journal Published Year Pages File Type
1334216 Polyhedron 2016 7 Pages PDF
Abstract

By means of “1,2,4-triazine” strategy new 2,2′-bipyridine-type lanthanide ligands, i.e. 5-aryl-2,2′-bipyridine-6′-carboxylic acids and its cycloalkane-annulated derivatives, i.e. 6-(4-aryl-6,7-dihydro-5H-cyclopenta[c]pyridin-1-yl)picolinic acids, have been synthesized, and their luminescent neutral lanthanide complexes have been prepared. Due to the presence of an annulated cyclopentene fragment the last ligand lanthanide complexes exhibited high solubility in non-polar solvents. In comparison with early published chelates the herein reported complexes exhibit improved photophysical properties in non-polar solvents namely more pronounced bathochromic shift in absorption spectra and higher europium luminescence quantum yields. The structures of two europium complexes have been confirmed based on X-ray diffraction analysis.

Graphical AbstractBy means of “1,2,4-triazine” strategy new 2,2′-bipyridine-type lanthanide ligands, i.e. 5-aryl-2,2′-bipyridine-6′-carboxylic acids and its cycloalkane-annulated derivatives, i.e. 6-(4-aryl-6,7-dihydro-5H-cyclopenta[c]pyridin-1-yl)picolinic acids, have been synthesized, and their luminescent neutral lanthanide complexes have been prepared. Due to the presence of an annulated cyclopentene fragment the last ligand lanthanide complexes exhibited high solubility in non-polar solvents. In comparison with early published chelates the herein reported complexes exhibit improved photophysical properties in non-polar solvents namely more pronounced bathochromic shift in absorption spectra and higher europium luminescence quantum yields. The structures of two europium complexes have been confirmed based on X-ray diffraction analysis.Figure optionsDownload full-size imageDownload as PowerPoint slide

Related Topics
Physical Sciences and Engineering Chemistry Inorganic Chemistry
Authors
, , , ,