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.

Systematic Exploration of Structural Topologies in Hydrogen-Bonded Supramolecular Assemblies of Citric Acid with Different Heterocyclic Compounds.

Hydrogen-bonded supramolecular assemblies of citric acid, , with some heterocyclic compounds (-donor and -oxide)-acridine (), phenazine (), 1,10-phenanthroline (), 1,7-phenanthroline (), 4,7-phenanthroline (), 1,4-diazabicyclo[2.2.2]octane (), and 4,4'-bipyridyl-,'-dioxide ()-have been reported.

Hydrogen-Bonded Organic Framework Structure: A Metal-Free Electrocatalyst for the Evolution of Hydrogen.

The hydrogen-bonded organic frameworks (HOFs) have gained significant attention due to their various alluring applications in the fascinating field of supramolecular chemistry. Herein, we report the electrocatalytic activity of HOFs toward the hydrogen evolution reaction (HER) by utilizing the molecular adduct of cyanuric and trithiocyanuric acid with various organic substrates (melamine and 4,4'-bipyridine). Both the experimental and theoretical findings provide insights and validate the electrocatalytic activity toward HER applications.

A competitive molecular recognition study: syntheses and analysis of supramolecular assemblies of 3,5-dihydroxybenzoic acid and its bromo derivative with some N-donor compounds.

A molecular recognition study of 3,5-dihydroxybenzoic acid (1) and its bromo derivative 4-bromo-3,5-dihydroxybenzoic acid (2) with the N-donor compounds 1,2-bis(4-pyridyl)ethene (bpyee), 1,2-bis(4-pyridyl)ethane (bpyea), and 4,4'-bipyridine (bpy) is reported. Thus, the syntheses and structural analysis of molecular adducts 1 a-1 c (1 with bpyee, bpyea, and bpy, respectively) and 2 a-2 c (2 with bpyee, bpyea, and bpy, respectively) are discussed. In all these adducts, recognition between the constituents is established through either O--H.