Brian Moulton

Coordination polymer gels: synthesis, structure and mechanical properties of amorphous coordination polymers

The synthesis and mechanical properties of a new class of coordination polymer based materials, amorphous coordination polymer sol-gels and xerogels, is presented.

A single-crystalline microporous coordination polymer with mixed parallel and diagonal interpenetrating α-Po networks

A single-crystalline 3D coordination polymer constructed from mixed parallel and diagonal interpenetrating α-polonium-like networks has been synthesized and characterized. The superior adsorption properties of this coordination polymer are also reported herein.

Supramolecular associates of para-aminobenzoic acid with N-and N,O-heterocyclic molecules

A series of novel supramolecular multicomponent complexes of para-aminobenzoic acid (PABA) with N-containing cyclic molecules and aza-crown ethers, (H2PPz)·(PABA)2·2H2O (1), (H2teta)·(PABA)2·H2O (2), (H2cyclen)·(PABA)2·2H2O (3), (H2-diazonia-12C4)·(PABA)2·2H2O (4), (H-azonia-18C6)·(PABA)·3H2O (5) (PPz = piperazine, teta = meso-5,7,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane, cyclen = 1,4,7,10-tetraazacyclododecane, diaza-12-crown-4 = 1,7-dioxa-4,10-diazacyclododecane and aza-18-crown-6 = 1,4,7,10,13-pentaoxa-16-azacyclooctadecane) has been synthesized. Crystallographic studies reveal that all complexes are organic salts formed due to the proton transfer from the carboxylic group of PABA to the amino group of the macrocycle, and thus are comprised of PABA anion, macrocyclic mono- or dication and a variable number of water molecules. In all complexes the cations and anions are associated via (H2N+)NH⋯O(COO−) charge-assisted hydrogen bonds. The number of PABA involved in the complex equals to the number of N-protonated binding sites in the cyclic molecule. Water molecules play a significant role in the formation of the supramolecular architecture.