Nitrogen-containing pyridine and quinoline are outstanding platforms on which excellent ionophores and sensors for metal ions can be built. Steric and stereochemical effects can be used to modulate the affinity and selectivity of such ligands toward different metal ions on the coordination chemistry front. On the signal transduction front. such effects can also be used to modulate opt... https://www.roneverhart.com/L-Homme-Ideal-Cologne-by-Guerlain/