Supramolecular assemblies in the molecular complexes of 4-cyanophenylboronic acid with different N-donor ligands.

Molecular complexes of 4-cyanophenylboronic acid (CB) with various N-donor compounds having different conformational features, for example, rigid (1,10-phenanthroline (), 4,7-phenanthroline (), 1,7-phenanthroline () and acridine ()) and linear (1,2-bis(4-pyridyl)ethane (), 1,2-bis(4-pyridyl)ethene () and 4,4'-azopyridine ()), have been reported. In all complexes, the -B(OH) moiety is found to be in a - confirmation, with the exception of structures containing , , and , wherein, - conformation is observed. Further, CB molecules remain intact in all structures except in the complexes with some linear N-donor ligands, wherein -B(OH) transforms to monoester (-B(OH)(OCH)) prior to the formation of corresponding molecular complexes.

A magnetically separable and recyclable g-CN/FeO/porous ruthenium nanocatalyst for the photocatalytic degradation of water-soluble aromatic amines and azo dyes.

Herein, we present the development of a visible-light-driven magnetically retrievable nanophotocatalyst made of porous ruthenium nanoparticles supported on magnetic carbon nitride (g-CN/FeO/p-RuNP) for the facile removal/degradation of aromatic amines and azo dyes from wastewater. Aromatic amines and azo-based dyes in water bodies are highly toxic and carcinogenic even at very low concentrations and are difficult to separate because of their high solubility. Our nanocatalyst can efficiently degrade/decompose the aromatic amines and azo dyes under visible light (LED/sunlight) at room temperature and in a wide pH range (pH 5.