Three 2D Ag(I)-framework isomers were constructed from enantiopure camphor-10-sulfonic acids or racemic camphor-10-sulfonic acids, together with achiral 4-aminobenzoic acids. In complex 1, (+)-camphor-10-sulfonic acids bridge the single left-handed helices that are made up of Ag ions and 4-aminobenzoic acids, generating a homochiral 2D layer. In such a structure, the interweaving of triple left...

Herein we report the first example of the catalytic enantioselective addition of sodium bisulfite to a,b-unsaturated alkenes 1a–q which was achieved by the selection of an appropriate aminothiourea bifunctional catalyst (Scheme 1). Following the pioneering work carried out by the groups of Soo s, Connon, Deng, and Wang, bifunctional catalysis has matured to become a prominent area of organic sy...

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Sulfonic aromatic compounds are widely used in the textile industry for the synthesis of azo dyes. The presence of the sulfonic group endows these compounds with high water-solubility and resistance to biological treatment. The present work analysed the efficacy of oxidation with ozone in the treatment of waters containing naphthalene-1-sulfonic acid, naphthalene-1,5-disulfonic acid and naphtha...