title: Metal-directed synthesis of enantiomerially pure dimetallic lanthanide luminescent triple-stranded helicates.
abstract: The synthesis and photophysical evaluation of two enatiomerially pure dimetallic lanthanide luminescent triple-stranded helicates is described. The two systems, formed from the chiral (R,R) ligand 1 and (S,S) ligand 2, were produced as single species in solution, where the excitation of either the naphthalene antennae or the pyridiyl units gave rise to Eu(III) emission in a variety of solvents. Excitation of the antennae also gave rise to circularly polarized Eu(III) luminescence emissions for Eu(2):1(3) and Eu(2):2(3) that were of equal intensity and opposite sign, confirming their enantiomeric nature in solution providing a basis upon which we were able to assign the absolute configurations of Eu(2):1(3) and Eu(2):2(3).
authors: School of Chemistry, Center for Synthesis and Chemical Biology, Trinity College Dublin, Dublin 2, Ireland.
authors: Floriana
authors: F
authors: Stomeo
authors: Christophe
authors: C
authors: Lincheneau
authors: Joseph P
authors: JP
authors: Leonard
authors: John E
authors: JE
authors: O'Brien
authors: Robert D
authors: RD
authors: Peacock
authors: Colin P
authors: CP
authors: McCoy
authors: Thorfinnur
authors: T
authors: Gunnlaugsson
mesh_terms: D005063:Europium / Q000737:chemistry; D006046:Gold / Q000737:chemistry; D028581:Lanthanoid Series Elements / Q000737:chemistry*; D008024:Ligands; D049449:Luminescence; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D008968:Molecular Conformation; D009281:Naphthalenes / Q000737:chemistry; D013237:Stereoisomerism
chemical_list: D028581:Lanthanoid Series Elements; D008024:Ligands; D009281:Naphthalenes; C031721:naphthalene; D005063:Europium; D006046:Gold