Metal-directed synthesis of enantiomerially pure dimetallic lanthanide luminescent triple-stranded helicates

J Am Chem Soc. 2009 Jul 22;131(28):9636-7. doi: 10.1021/ja9032204.

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).

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Europium / chemistry
  • Gold / chemistry
  • Lanthanoid Series Elements / chemistry*
  • Ligands
  • Luminescence*
  • Magnetic Resonance Spectroscopy
  • Models, Molecular
  • Molecular Conformation
  • Naphthalenes / chemistry
  • Stereoisomerism

Substances

  • Lanthanoid Series Elements
  • Ligands
  • Naphthalenes
  • naphthalene
  • Europium
  • Gold