Ultralight aerogels via supramolecular polymerization of a new chiral perfluoropyridine-based sulfonimidamide organogelator

Abstract

Chiral and enantiopure perfluorinated sulfonimidamides act as low-molecular gelators at low critical gelation concentration (<1 mg/mL) via supramolecular polymerization in nonpolar organic solvents and more heterogenic mixtures, such as biodiesel...

Binaphthalene-Assisted Axial Chirality in Porphyrins: Toward Solid-State Circularly Polarized Luminescence from Self-Assembled Nanostructures

“…Upon introduction of D 2 O to the compound 1 in DMSO- d 6 , the highly shielded monomeric porphyrin core protons (−2.6 ppm) disappeared (Figure a). During the aggregation of porphyrins, the exchange of protons between different environments (monomeric and aggregated states) leads to gradual broadening and disappearance of NMR signals. , The beta protons of the porphyrin ring (9.2 ppm) are shielded on aggregation due to the π–π stacking (Figure b). The methoxy protons on the binaphthalene experiences different shielding effects in aggregates due to the different orientation of two biphenyls around the chiral axis of the binaphthalene ring.…”