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Durham University

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Dr Mark A. Fox

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Senior Research Officer in the Department of Chemistry

(email at m.a.fox@durham.ac.uk)

Research Interests

Our primary area of interest is the chemistry of carboranes. Carboranes are clusters containing boron and carbon atoms with terminal or bridging hydrogens. We are principally interested in the fundamental synthetic, chemical and physical properties of these compounds. They are characterised by spectroscopic (NMR, IR, UV-vis, MS, Raman), computational (DFT) and diffraction (X-ray) methods available from the excellent departmental research facilities here.

Clusters with unusual electron counts

Geometries of carboranes tend to be either open or closed cages depending on the general skeletal electron counting rules pioneered by Prof Wade of this department. Generally, the closed cage geometries contain 2n+2 skeletal electrons (n = number of vertices) whereas the open cage geometries have 2n+4 skeletal electrons. We have determined a geometry containing 2n+3 skeletal electrons by a combination of spectroscopic and computational methods on a carborane anion radical.

Perhalogenation of clusters

Replacing the hydrogens surrounding a carborane with halogens can result in vastly different chemical, geometrical and physical properties. For example, a halogen in place of a hydrogen atom can make the carborane more stable or more reactive. The geometry of the cage can be greatly distorted by the steric bulk of the chlorine, bromine or iodine atoms. The strongest known acids are those containing the very robust halogenated monocarborane anions.

Nanovehicles

A recent development in nanovehicle research involves the use of carborane clusters as wheels. We have developed convenient syntheses of ethynylcarboranes which are ideally suited to parts of the nanocar concept with the use of the ethynyl rods as axles.

 

 

Research Groups

Department of Chemistry

Research Interests

  • Synthetic Chemistry
  • Carboranes

Selected Publications

Chapter in book

  • Fox, M.A. (Published). Polyhedral Carboranes. In Comprehensive Organometallic Chemistry III. Elsevier. 3: 49-112.

Journal Article

Show all publications

Selected Grants

  • 2011: Novel electrocatalysts for H2 generation (£3465.00 from One NorthEast)
  • 2009: EP/P505186/1: EPSRC DTG Rachel Harder
  • 2007: GR/T05271/01: EPSRC The cyanoacetylide ligand: taking cyanide chemistry to new lengths
  • 2005: GR/S80943/01 Carborane Radical Anions: A missing link in cluster systematics
  • 2003: GR/S24893/01: EPSRC Crystal Faraday, Thin Film Gas/Liquid Microreactors for Fluorination
  • 2000: GUERBET B12 (£18000.00 from Guerbet S A)
  • 1998: AF/98/2454 or AF/100065: Novel boron-nitrogen heterocycles and boron nitride carbide alloys accessible from boranes
  • 1995: GR/K21566 or GR/H95426: Syntheses and deboronation of icosahedral carborane derivatives