Dr. Simon Clarke
Summary of Research Interests
Telephone: (01865) 272695; Fax: (01865) 272690
Email: simon.clarke@chem.ox.ac.uk
Research
Group Web Pages
The synthesis, structures and properties of new solids.
One of the aims of solid state chemistry is to
fuel developments at the interfaces with physics and materials science
by providing new compositions with desirable magnetic, electronic
or optical properties which will be of potential use in the development
of new technologies.
(A new homologous series of oxysulfides Sr2MnO2.Cu2mSm+1.
The m = 1, 2 & 3 members are depicted.)
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Oxides are a very well established class of solid
state compound with a plethora of properties which can be optimised
by judicious tuning of, for example, the electron count and ionic
sizes. Non-oxide solids, or those which contain another anion
apart from oxide have been investigated far less; these compounds,
which include nitrides, sulfides and the intermediate oxynitrides
and oxysulfides, represent a relatively unexplored dimension in
solid state chemistry. The group’s aim is to exploit the
chemical differences between different anions to access a range
of properties complementary to those of oxides. These properties
might include superconductivity or magnetoresistance, or a range
of desirable semiconductor properties suggesting application as
photovoltaic or thermoelectric materials.
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(BaSiN2 a new nitridosilicate containing
edge- and corner-sharing SiN4 tetrahedra.)
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The approach in the group is to synthesise new
compounds using a range of high and low temperature methods, measure
their crystal structures and physical properties and feed this information
back into the synthetic programme.
The group effort is currently focused mainly in the areas of oxychalcogenides and nitrides.
These compounds are synthesised
and measured
using a wide range of techniques. Details may be found in the
research section of the group's webpages |
Recent Publications:
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Topotactic oxidative and reductive control of the structures and properties
of layered manganese oxychalcogenides G Hyett, N Barrier, S J Clarke and J
Hadermann Journal of the American Chemical Society 129 11192 (2007).
Download
- Layered Oxysulfides Sr2MnO2Cu2m-0.5Sm+1 (m = 1, 2, and 3) as Insertion Hosts for
Li Ion Batteries S Indris, J Cabana, O J Rutt, S J Clarke and C P Grey
Journal of the American Chemical Society 128 13354 (2006).
Download
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Reversible lithium insertion and copper extrusion in layered oxysulfides O J Rutt, G R.Williams and S J Clarke
Chemical Communications 2869 (2006).
Download
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Structural Chemistry and Metamagnetism of an Homologous Series of Layered Manganese Oxysulfides
Z A Gl, O J Rutt, C F Smura, T P Overton, N Barrier, S J Clarke and J Hadermann
Journal of the American Chemical Society 128 8530 (2006).
Download
- The first ternary tin (II) nitride: NaSnN N S P Watney, Z A Gl, M D S Webster
and S J Clarke
Chemical Communications
4190 - 4192 (2005). Download
- Electronically-driven structural distortions in lithium intercalates
of the n = 2 Ruddlesden-Popper type host Y2Ti2O5S2:
synthesis, structure and properties of LixY2Ti2O5S2
(0 < x < 2). G Hyett, O J Rutt, Z A Gál,
S G Denis, M A Hayward and S J Clarke, Journal of the American
Chemical Society 126 1980-1991 (2004).Download
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