Hydroxamic acids and their porous materials

Abstract

This thesis aims to provide better understand of the supramolecular synthons of hydroxamic acids and the design rules associated with the porous materials based on hydroxamic acids. Also studied was how synthesis routes influcence the self-assembaly process and the properties of the materials produced. Using a range of analytical techniques, including thermogravimetric analysis, pair distribution function and X-ray diffraction, the structure, design and supramolecular synthons of hydroxamic acids have been studied. By determining the supramolecular synthons of hydroxamic acids the successful production of cocrystals was accomplished. By better understanding the coordination of hydroxamates to metals we have formed two solvates of an eight coordinate Zirconium1[hydroxamate]4 complex. The design rules for the formation of intrinsically and extrinsically porous M4[hydroxamate]6 tetrahedra have also been explored. Using crystal engineering principles it has been possible to produce a series of materials with increasing amounts of extrinsic porosity.The host:guest chemistry of the M4L6 tetrahdera has been studied. The host:guest properties of a family of coordination polymers and macrocycles were also studied. The materials were synthesised via mechanochemical synthesis and solution state crystallisation, with the aim of understanding how the synthetic method affects the host:guest properties of the material.