Chemistry
Recent Deposits
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A Metallosupramolecular Approach to Responsive Polymer Gels using Pyridine-Hydrazones
The use of metal-induced conformational changes in pyridine-hydrazone crosslinkers to control the volumes of gels was complicated by the adaptive metallosupramolecular behaviour of the ligands. The combination of ... -
Spectroscopy of Donor-Acceptor Dyes
A number of organic donor-acceptor dyes were investigated using spectroscopic and computational methods. This class of materials can form charge-transfer excited-states which result in a number of interesting properties. ... -
Transition metal complexes of pyrazine-based bis-terdentate diamide ligands
The four symmetrical, closely related pyrazine-based bis-terdentate diamide ligands N,N'-bis(2-pyridylmethyl)pyrazine-2,3-dicarboxamide (H2 LM1), N,N'-bis[2-(2-pyridyl)ethyl]pyrazine-2,3-dicarboxamide (H2 LM2), ... -
Total Synthesis of (-)-Spiroleucettadine
One of a number of intriguing new alkaloids isolated from the Leucetta sp. sponge in 2004, spiroleucettadine displayed unique structural features on a restricted scaffold: a trans-fused 5,5-bicyclic ring system together ... -
Accessing Natural Product Scaffolds; A Top-Down and Bottom-Up Approach
Natural products, and natural product derivatives, have applications in both total synthesis and synthetic methodology, as well as having medical applications. Whilst many natural products possess suitable activity against ... -
Hydrogen Isotopes in New Zealand Soil: A method comparison
The spatial characteristic of stable hydrogen and oxygen isotope ratios of global precipitation has been widely investigated. This study extends that investigation to tracing the flow of hydrogen isotope ratio patterns ... -
Determination of Trace Metal Contaminants in the Whau and Pakuranga Catchments Using the DGT Method
Metal contaminants have become a major issue in today’s environment, and increasing research is being done on methods to monitor and determine point sources of these contaminants. Passive sampling devices are one such ... -
Ag(I) containing supramolecular architectures with flexible asymmetric ligands
This thesis describes the synthesis and characterization of a series of metallo-supramolecular complexes, synthesized with either 3,4 dipyridyl ketone (LK34), 3,4 dipyridyl ketone oxime (LO34) or 3,4-dipyridyl methanol ... -
Synthesis and Utilization of Novel Chromone Based Scaffolds
The chromone moiety (11) is a common structural motif found in a wealth of natural products and medicinally relevant compounds. Its synthesis has been investigated for over 100 years, yet opportunities still remain for ... -
The Role of Dissolved Organic Matter (DOM) in Biogeochemical Cycling of Iron within Estuarine and Coastal Waters
Iron (Fe) is an essential element for the biochemical and physiological functioning of terrestrial and oceanic organisms. Speciation describes the chemical forms in which Fe is present in an aquatic environment. It is ... -
Carbazole-based Schiff base Macrocycles and Complexes: Redox, Fluorescence and Catalysis
This thesis outlines the successful synthesis of the first families of pure samples of carbazole-based Schiff base macrocycles and complexes. These compounds represent a new generation of Schiff base macrocycles and ... -
Stable isotope modelling of blackberry to trace the origin of cannabis
The legality of marijuana and its products in different countries and cultures is subject of debate prompting scientific research about developing new techniques to enable verification of the region of origin of marijuana ... -
2000 Years of Sub-Antarctic Climate: The Use of n-alkanes and Compound-Specific Isotopes for the Paleoclimate Reconstruction of Auckland Island
The Southern Ocean’s air-sea CO2 flux is heavily influenced by the strength and position of the Southern Hemisphere westerly winds (SHWWs) over the southern mid-latitudes. An increasingly positive southern annular mode ... -
Oceanic nitrous oxide distribution and production a stable isotopic approach
Nitrous oxide (N2O) is a biogenic trace gas that has a significant role in global climate change, stratospheric chemistry and in the ocean nitrogen cycle. Its concentration in the ambient air has increased to the current ... -
Understanding the Past, Current and Future Transport and Fate of Semi-Volatile Organic Compounds in A Remote Alpine Glacier-Fed Lake in New Zealand
Persistent semi-volatile organic compounds (SVOCs) undergo atmospheric transport and accumulate in cold ecosystems, and their fates are intimately linked to those of the snowpack and glaciers into which they become trapped. ... -
Spin Crossover by Design
Spin crossover (SCO)-active iron(II)-based materials are of great academic interest, and of relevance in fields such as molecular materials and nanoscience, thanks to their versatility as molecular switches. However, ... -
Discrete Polynuclear Complexes: from Spin Crossover to Hydrogen Evolution
Spin crossover and hydrogen evolution catalysis are two areas of chemical research that address modern society’s demand for nanoscale technologies and renewable energy supplies. One avenue to improving the desired properties ... -
Marine biogeochemical cycling of cadmium and its isotopes: Studies of the South Pacific Ocean, Mediterranean Sea and Black Sea
Cadmium (Cd) is utilised by phytoplankton in the ocean, especially under zinc (Zn)- and iron (Fe)-limited conditions, and is a crucial yet underconstrained component of the ocean’s biological pump, regulating ocean-atmosphere ... -
Dissolution of Abiogenic and Biogenic Calcium Carbonate under Ocean Acidification Conditions
Under ocean acidification conditions, the chemistry of the seawater will change including a decrease in pH, a decrease in carbonate ion concentration and a decrease in the calcium carbonate saturation state of the water ... -
Hydrogels For Biomedical Applications: From Bio-adhesive to Drug Delivery
There is a need for materials to replace the use of sutures and staples in surgical procedures. Amongst all the alternatives, special attention has been paid to hydrogels because of their unique and interesting ...