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.