Fig. 1: Structure of compounds and writing of chemical information.

a Molecular structures of hosts and guests: chiral porphyrin-cages 1-4 and achiral and chiral viologen guests 5 and 6. b Schematic representation of a chiral manganese porphyrin cage catalyst (green) provided with a 4-tert-butylpyridine ligand (blue) gliding along a chiral polymer chain (e.g. polybutadiene), while converting the polymer double bonds into chiral epoxide functions (red and purple), see text.