Sequential chiral induction between organic and inorganic supramolecular helical assemblies for the in situ formation of chiral carbon dots

Abstract

Self-organised helical bilayers of dicationic gemini surfactants confined in helical silica nanospace were transformed to carbon dots via pyrolysis. They exhibited absorption spanning from UV to visible range, and showed...

Porphyrin-Based Hybrid Nanohelices: Cooperative Effect between Molecular and Supramolecular Chirality on Amplified Optical Activity

“…We have previously reported how achiral gemini-type dialkyl diammonium amphiphilic molecules complexed with chiral tartrate counterions self-assemble to helical nanoribbons. The coverage of these structures with silica gives rise to organic–inorganic chiral nanostructures called hybrid nanohelices (HH, Figure a). − When tartrate anions as an origin of chirality are replaced with other anions, the confinement in the nanometric chiral space given by the solid silica walls may induce a chiroptical activity in the new guest molecules. Thus, hybrid nanohelices provide a versatile chiral nanospace where achiral molecules can enter and organize in a chiral way (see the CD signal of hybrid nanohelices, HH, in Figure b). , In the present work, we extend this approach to study chiral porphyrin derivatives.…”