Kinetic traps to activate stereomutation in supramolecular polymers

We describe the helical stereomutation in the kinetically controlled coassembly of the reported carbonyl‐bridged triarylamines (CBTs). The copolymerization of chiral CBTs (S)‐1 or (R)‐1 with achiral 2 in sergeants‐and‐soldiers (SaS) experiments results in a tuneable helicity conditioned by the percentage of the chiral sergeant and by the cooling rate. The dissimilar inherent chirality of the extended monomeric (M) and intramolecularly H‐bonded metastable (M*) species as well as the different stability of the kinetic trap of the chiral CBTs (S)‐1/(R)‐1 and the achiral CBT 2 condition the chirality transfer and afford J‐aggregates of inverse handedness
MINECO
Depto. de Química Orgánica
Fac. de Ciencias Químicas
TRUE
pub