Enantiopure Dendrimers Derived from the 1,1′-Binaphthyl Moiety: A Correlation Between Chiroptical Properties and Conformation of the 1,1′-Binaphthyl Template

Dendritic Oligoethers

“…Such findings were rationalized by a twisting of the conformation of the chiral core unit induced by the increasing steric crowding with increasing dendrimer generation. The dependence of molar rotation on the conformation of the chiral core had also been observed by Meijer in his study of oligoether-based dendrimers 65 containing an axially chiral binaphthol core [32].…”

Circular Dichroism Techniques: Biomolecular and Nanostructural Analyses‐ A Review

“…When a single chiral group such as aminophenyl propanediol (109) or binaphthyl (110) is located at the core of PBzE dendrimers, the CD data affords information about the variation of the dihedral angle θ in the binaphthyl (111). For fully chiral dendrimers, the chiroptical properties of two series of chiral polyarylether dendrimers from generation 0 to 3 (112) and of dendrimers based on dihydroxypyrrolidine (113) show that the CD spectra change dramatically, indicating conformational substructures in the branches.…”

Helical Polyacetylene: Asymmetric Polymerization in a Chiral Liquid-Crystal Field

“…The (R)-binaphthyl derivatives give a negative couplet for θ in the range from 0°to 110°and a positive couplet from 110°to 180°, with negativeandpositivemaximaat60°and140°,respectively. [183][184][185][186][187][188] The values of De at approximately 230 nm become larger in the order of the nonbridged (R)-1 and (R)-2 and the bridged (R)-3 binaphthyl derivatives, as shown in Figure 30. Thus, the dihedral angles become smaller in this order.…”