Abstract
The labile metal-cyclens having three azaaromatic moieties (2-pyridylmethyl or 2-quinolinylmethyl group) and one triazole-coumarin moiety on the sidearms were synthesized. Crystal structure of P3Cm·NaI complex indicates that four aromatic rings are arranged in a propeller-like fashion. Addition of a chiral compound, such as amino acid salts, to a solution of the Ca(II) complexes gave induced circular dichroism signals at the coumarin chromophore. These reversible and switchable chirality transfer indicates that the labile metal-cyclen complexes work as effective chirality mediators from external chiral sources to the triazole-coumarin moiety.
