Towards the introduction of communication between metallo-supramolecular [M2L3]2- and [M2L3]4+ assemblies.

Type of content
Theses / Dissertations
Publisher's DOI/URI
Thesis discipline
Chemistry
Degree name
Master of Science
Publisher
University of Canterbury
Journal Title
Journal ISSN
Volume Title
Language
English
Date
2017
Authors
Hermanspahn, Lily M.
Abstract

In this thesis the construction of a number of supramolecular entities was undertaken with the intention to probe their spin-crossover properties. The introduction of communication between metal complexes within the crystal lattice through non-covalent interactions was investigated in an attempt to probe cooperativity of any spin crossover (SCO). The coordination of two distinct ligands to create supramolecular [M2L3] assemblies was investigated. Sulfonated helicates [Fe(OH2)6][Fe2L33], [Co(OH2)6][Co2L43], [Ni(OH2)6][Ni2L43], K2[Fe2L33], Ca[Fe2L33] and [Fe(OH2)6]0.2Rb1.6[Fe2L33] were constructed from the precursor ligand 6,6’-oxy-bis(3-aminobenzenesulfonic acid). Preliminary investigations in the occurrence of SCO were conducted on the [Fe(OH2)6][Fe2L33] and [Co(OH2)6][Co2L43] metallo-helicates. In conjunction, phosphate supramolecular assemblies [Fe2L53]4+, [Zn2L53]4+, [Fe2L63]4+, [Co2L63]4+, [Ni2L63]4+, [Co2L73]4+, [Ni2L73]4+ and [Cu2L73]4+ were also synthesised from the precursor ligand bis(4-aminophenyl)phenyl phosphate, however, further refinement of the crystallisation process is needed before spin-crossover studies can take place.

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