Weakly Basic Anion Recognition by Naphthalenediimide-Based Polymer

Enantiomer Recognition Based on Chirality Transfer from Chiral Amines to Ternary Dynamic Covalent Systems

Enantiomer recognition is usually required in organic synthesis and materials and life sciences. This paper describes an enantiomer recognition method based on ternary dynamic covalent systems constructed via the complexation of chiral amines with a chiral boronate derived from 1,4-phenylenediboric acid and an L-DOPA-modified naphthalenediimide. The ternary systems aggregate into chiral assemblies driven by π-π interactions, and the chirality is transferred from the chiral amines to assemblies with high stereospecificity. Consequently, the enantiomer composition of chiral amines and the absolute configuration of the major enantiomer can be determined according to the sign of the Cotton effect of the ternary system by using circular dichroism (CD) spectroscopy. This method offers the advantage of using the long wavelength CD signals of the boronate at around 520 nm, thereby avoiding interference with those of the carbon skeleton. This ternary system provides a novel approach to the design of enantiomer recognition systems.

Effects of cucurbit[n]uril (n = 7, 8, 10) hosts on the formation and stabilization of a naphthalenediimide (NDI) radical anion

The binding interactions of a NDI diammonium dichloride salt with cucurbit[n]uril (CB[n], n = 7,8, 10) and the formation process of a NDI radical anion upon photoexcitation of the NDI derivative in the presence of a CB[n] host have been investigated.

Supramolecular self-assembly of chiral polyimides driven by repeat units and end groups

Complementary aromatic π–π stacking and hydrogen bonding induce time-dependent chiroptical spectroscopic behaviours of l-phenylalaninate-derived chiral polyimide.