Skip to main content

Research Repository

Advanced Search

Professor John Evans' Outputs (100)

Structural Characterization and Physical Properties of the New Transition Metal Oxyselenide La2O2ZnSe2 (2013)
Journal Article
Tuxworth, A. J., McCabe, E. E., Free, D. G., Clark, S. J., & Evans, J. S. (2013). Structural Characterization and Physical Properties of the New Transition Metal Oxyselenide La2O2ZnSe2. Inorganic Chemistry, 52(4), 2078-2085. https://doi.org/10.1021/ic302484x

La2O2ZnSe2 adopts an unusual cation-ordered LaCuOS-related structure with both stripe- and checkerboard-ordered regions. Its structure has been determined using the symmetry mode approach. Optical measurements indicate that it is a wide band gap semi... Read More about Structural Characterization and Physical Properties of the New Transition Metal Oxyselenide La2O2ZnSe2.

Electroless deposition of multi-functional zinc oxide surfaces displaying photoconductive, superhydrophobic, photowetting, and antibacterial properties (2012)
Journal Article
Wood, T., Hurst, G., Schofield, W., Thompson, R., Oswald, G., Evans, J., …Badyal, J. (2012). Electroless deposition of multi-functional zinc oxide surfaces displaying photoconductive, superhydrophobic, photowetting, and antibacterial properties. Journal of materials chemistry, 22(9), 3859-3867. https://doi.org/10.1039/c2jm14260k

The TOPAS symbolic computation system (2011)
Journal Article
Coelho, A., Evans, J. S., Evans, I. R., Kern, A., & Parsons, S. (2011). The TOPAS symbolic computation system. Powder Diffraction, 26(S1), S22-S25. https://doi.org/10.1154/1.3661087

Computer algebra removes much of the drudgery from mathematics; it allows users to formulate models by using the language of mathematics and to have those models evaluated with little effort. This symbolic form of representation is often thought of a... Read More about The TOPAS symbolic computation system.

Preparation, Characterization, and Structural Phase Transitions in a New Family of Semiconducting Transition Metal Oxychalcogenides beta-La(2)O(2)MSe(2) (M = Mn, Fe) (2010)
Journal Article
McCabe, E., Free, D., Mendis, B., Higgins, J., & Evans, J. (2010). Preparation, Characterization, and Structural Phase Transitions in a New Family of Semiconducting Transition Metal Oxychalcogenides beta-La(2)O(2)MSe(2) (M = Mn, Fe). Chemistry of Materials, 22(22), 6171-6182. https://doi.org/10.1021/cm1023103

Low-temperature nuclear and magnetic structures of La2O2Fe2OSe2 from x-ray and neutron diffraction measurements (2010)
Journal Article
Free, D. G., & Evans, J. S. (2010). Low-temperature nuclear and magnetic structures of La2O2Fe2OSe2 from x-ray and neutron diffraction measurements. Physical Review B, 81(21), Article 214433. https://doi.org/10.1103/physrevb.81.214433

This paper describes the low-temperature nuclear and magnetic structures of La 2 O 2 Fe 2 OSe 2 by analysis of x-ray and neutron diffraction data. The material has been demonstrated to order antiferromagnetically at low temperatures, with T N = ∼ 90... Read More about Low-temperature nuclear and magnetic structures of La2O2Fe2OSe2 from x-ray and neutron diffraction measurements.

Structures and Phase Transitions in (MoO2)2P2O7 (2010)
Journal Article
Lister, S., Soleilhavoup, A., Withers, R., Hodgkinson, P., & Evans, J. (2010). Structures and Phase Transitions in (MoO2)2P2O7. Inorganic Chemistry, 49(5), 2290-2301. https://doi.org/10.1021/ic902166j

We report structural investigations into (MoO2)2P2O7 using a combination of X-ray, neutron and electron diffraction, and solid-state NMR supported by first principles quantum chemical calculations. These reveal a series of phase transitions on coolin... Read More about Structures and Phase Transitions in (MoO2)2P2O7.

Complex Superstructures of Mo2P4O15 (2009)
Journal Article
Lister, S. E., Evans, I. R., & Evans, J. S. (2009). Complex Superstructures of Mo2P4O15. Inorganic Chemistry, 48(19), 9271-9281. https://doi.org/10.1021/ic901090p

We report structural studies on Mo2P4O15 over the temperature range 16−731 K, which show that it is considerably more complex than revealed by earlier work. Its low-temperature structure has lattice parameters a = 24.1134(6) Å, b = 19.5324(5) Å, c =... Read More about Complex Superstructures of Mo2P4O15.

Chemically blockable transformation and ultraselective low-pressure gas adsorption in a non-porous metal organic framework. (2009)
Journal Article
Xiao, B., Byrne, P., Wheatley, P., Wragg, D., Zhao, X., Fletcher, A., …Morris, R. (2009). Chemically blockable transformation and ultraselective low-pressure gas adsorption in a non-porous metal organic framework. Nature Chemistry, 1(4), 289-294. https://doi.org/10.1038/nchem.254

Metal organic frameworks (MOFs) are among the most exciting materials discovered recently, attracting particular attention for their gas-adsorption and -storage properties. Certain MOFs show considerable structural flexibility in response to various... Read More about Chemically blockable transformation and ultraselective low-pressure gas adsorption in a non-porous metal organic framework..

Energy-dispersive diffraction studies of inert anodes. (2009)
Journal Article
Scarlett, N. V., Madsen, I. C., Evans, J. S., Coelho, A. A., McGregor, K., Rowles, M., …Urban, A. J. (2009). Energy-dispersive diffraction studies of inert anodes. Journal of Applied Crystallography, 42(3), 502-512. https://doi.org/10.1107/s0021889809008681

A tomographic study of electrochemical cells to observe scales formed on inert anodes has been conducted using energy-dispersive synchrotron X-ray diffraction. This study is preparatory to an investigation that will observe this formation in situ dur... Read More about Energy-dispersive diffraction studies of inert anodes..

Polymorphism and hydrogen bonding in cinchomeronic acid: a variable temperature experimental and computational study (2008)
Journal Article
Evans, I. R., Howard, J. A., Evans, J. S., Postlethwaite, S. R., & Johnson, M. R. (2008). Polymorphism and hydrogen bonding in cinchomeronic acid: a variable temperature experimental and computational study. CrystEngComm, 10(10), 1404-1409. https://doi.org/10.1039/b807015f

3,4-Pyridinedicarboxylic acid is a compound commonly used as a multifunctional ligand in coordination chemistry. The crystal structure of its orthorhombic Form I has been known for over 30 years, while a new Form II has only been reported recently as... Read More about Polymorphism and hydrogen bonding in cinchomeronic acid: a variable temperature experimental and computational study.

Argentophilicity-Dependent Colossal Thermal Expansion in Extended Prussian Blue Analogues. (2008)
Journal Article
Goodwin, A. L., Keen, D. A., Tucker, M. G., Dove, M. T., Peters, L., & Evans, J. S. (2008). Argentophilicity-Dependent Colossal Thermal Expansion in Extended Prussian Blue Analogues. Journal of the American Chemical Society, 130(30), 9660-9661. https://doi.org/10.1021/ja803623u

The thermal expansion behavior of isostructural variants of the colossal thermal expansion material Ag3[CoIII(CN)6] has been investigated using variable temperature X-ray and neutron powder diffraction. It was found that substitution at the octahedra... Read More about Argentophilicity-Dependent Colossal Thermal Expansion in Extended Prussian Blue Analogues..

Structural ferroelectric phase transition and polymorphism in 2-aminopyridine dihydrogen phosphate (2008)
Journal Article
Evans, I. R., Howard, J. A., & Evans, J. S. (2008). Structural ferroelectric phase transition and polymorphism in 2-aminopyridine dihydrogen phosphate. Crystal Growth and Design, 8(5), 1635-1639. https://doi.org/10.1021/cg701076s

The structural ferroelectric phase transition in 2-aminopyridine dihydrogen phosphate (2APP) has been studied by single crystal and powder X-ray diffraction between room temperature and 16 K. It has been shown that α-aminopyridine dihydrogen phosphat... Read More about Structural ferroelectric phase transition and polymorphism in 2-aminopyridine dihydrogen phosphate.

Local structure in Ag3[Co(CN)6]: colossal thermal expansion, rigid unit modes and argentophilic interactions (2008)
Journal Article
Conterio, M. J., Goodwin, A. L., Tucker, M. G., Keen, D. A., Dove, M. T., Peters, L., & Evans, J. S. (2008). Local structure in Ag3[Co(CN)6]: colossal thermal expansion, rigid unit modes and argentophilic interactions. Journal of Physics: Condensed Matter, 20(25), Article 255225. https://doi.org/10.1088/0953-8984/20/25/255225

Local structure in the colossal thermal expansion material Ag3[Co(CN)6] is studied here using a combination of neutron total scattering and reverse Monte Carlo (RMC) analysis. We show that the large thermal variations in cell dimensions occur with mi... Read More about Local structure in Ag3[Co(CN)6]: colossal thermal expansion, rigid unit modes and argentophilic interactions.

Colossal Positive and Negative Thermal Expansion in the Framework Material Ag3[Co(CN)6] (2008)
Journal Article
Goodwin, A., Calleja, M., Conterio, M., Dove, M., Evans, J., Keen, D., …Tucker, M. (2008). Colossal Positive and Negative Thermal Expansion in the Framework Material Ag3[Co(CN)6]. Science, 319(5864), 794-797. https://doi.org/10.1126/science.1151442

We show that silver(I) hexacyanocobaltate(III), Ag3[Co(CN)6], exhibits positive and negative thermal expansion an order of magnitude greater than that seen in other crystalline materials. This framework material expands along one set of directions at... Read More about Colossal Positive and Negative Thermal Expansion in the Framework Material Ag3[Co(CN)6].