Brilliant Sm, Eu, Tb, and Dy chiral lanthanide complexes with strong circularly polarized luminescence.
The synthesis, characterization, and luminescent behavior of trivalent Sm, Eu, Dy, and Tb complexes of two enantiomeric, octadentate, chiral, 2-hydroxyisophthalamide ligands are reported. These complexes are highly luminescent in solution. Functionalization of the achiral parent ligand with a chiral 1-phenylethylamine substituent on the open face of the complex in close proximity to the metal center yields complexes with strong circularly polarized luminescence (CPL) activity. This appears to be the first example of a system utilizing the same ligand architecture to sensitize four different lanthanide cations and display CPL activity. The luminescence dissymmetry factor, g(lum), recorded for the Eu(III) complex is one of the highest values reported, and this is the first time the CPL effect has been demonstrated for a Sm(III) complex with a chiral ligand. The combination of high luminescence intensity with CPL activity should enable new bioanalytical applications of macromolecules in chiral environments.
Petoud
Stéphane
S
Department of Chemistry, University of California, Berkeley, California 94720, USA.
Muller
Gilles
G
Moore
Evan G
EG
Xu
Jide
J
Sokolnicki
Jurek
J
Riehl
James P
JP
Le
Uyen N
UN
Cohen
Seth M
SM
Raymond
Kenneth N
KN
D002942:Circular Dichroism; D004419:Dysprosium / Q000737:chemistry; D005063:Europium / Q000737:chemistry; D028581:Lanthanoid Series Elements / Q000138:chemical synthesis / Q000737:chemistry*; D008024:Ligands; D049449:Luminescence; D008163:Luminescent Measurements / Q000379:methods*; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D012493:Samarium / Q000737:chemistry; D012996:Solutions / Q000737:chemistry; D013725:Terbium / Q000737:chemistry; D014466:Ultraviolet Rays
D028581:Lanthanoid Series Elements; D008024:Ligands; D009942:Organometallic Compounds; D012996:Solutions; D013725:Terbium; D004419:Dysprosium; D012493:Samarium; D005063:Europium