A pre-synthetic strategy to construct single ion conductive covalent organic frameworks

A pre-synthetic strategy was proposed to prepare single-ion conductive COFs by using 2,5-diaminobenzene sulfonate salts as the monomers. This strategy is advanced in terms of atom economy and easy to operate in structure detection and preparation.

Melt-processable telechelic poly(ether imide)s end-capped with zinc sulfonate salts

Zinc sulfonated poly(ether imide)s possess significantly better mechanical and rheological properties than other metal sulfonated poly(ether imide)s and non-sulfonated ones.

Supramolecular interactions in carboxylate and sulfonate salts of 2,6-diamino-4-chloropyrimidinium

Two new salts, namely 2,6-diamino-4-chloropyrimidinium 2-carboxy-3-nitrobenzoate, C4H6ClN4 +·C8H4NO6 −, (I), and 2,6-diamino-4-chloropyrimidinium p-toluenesulfonate monohydrate, C4H6ClN4 +·C7H7O3S−·H2O, (II), have been synthesized and characterized by single-crystal X-ray diffraction. In both crystal structures, the N atom in the 1-position of the pyrimidine ring is protonated. In salt (I), the protonated N atom and the amino group of the pyrimidinium cation interact with the carboxylate group of the anion through N—H...O hydrogen bonds to form a heterosynthon with an R 2 2(8) ring motif. In hydrated salt (II), the presence of the water molecule prevents the formation of the familiar R 2 2(8) ring motif. Instead, an expanded ring [i.e. R 3 2(8)] is formed involving the sulfonate group, the pyrimidinium cation and the water molecule. Both salts form a supramolecular homosynthon [R 2 2(8) ring motif] through N—H...N hydrogen bonds. The molecular structures are further stabilized by π–π stacking, and C=O...π, C—H...O and C—H...Cl interactions.

Synthesis and Properties of 2-Oxa-6-azaspiro[3.3]heptane Sulfonate Salts

An improved synthesis of the bicyclic spiro compound 2-oxa-6-azaspiro[3.3]heptane is presented. While this compound is often isolated as an oxalate salt, its isolation as a sulfonic acid salt yields a more stable and more soluble product. With these improved properties access to a wider range of reaction conditions with the spirobicyclic 2-oxa-6-azaspiro[3.3]heptane has been enabled.

Aggregation-induced emission (AIE) characteristic of water-soluble tetraphenylethene (TPE) bearing four sulfonate salts

Aggregation-induced emission (AIE) characteristic of water-soluble tetraphenylethene (WS-TPE), was investigated by the addition of organic solvent into WS-TPE aqueous solution.