A5016438757- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Synthesis and characterization of novel inorganic/organometallic compounds
- Advanced ceramic materials synthesis
- Magnetism in coordination complexes
- Powder Metallurgy Techniques and Materials
- Organometallic Complex Synthesis and Catalysis
- Coordination Chemistry and Organometallics
- Nuclear Materials and Properties
- Advanced materials and composites
- Aluminum Alloys Composites Properties
- Organoboron and organosilicon chemistry
- Organic and Molecular Conductors Research
- Advanced NMR Techniques and Applications
- Rock Mechanics and Modeling
- Metal and Thin Film Mechanics
- Metallurgy and Material Forming
- Lanthanide and Transition Metal Complexes
- Crystallography and molecular interactions
- Radioactive element chemistry and processing
- Welding Techniques and Residual Stresses
- Organophosphorus compounds synthesis
- Laser Material Processing Techniques
- Nuclear reactor physics and engineering
- Intermetallics and Advanced Alloy Properties
University of Manchester
1971-2023
Newcastle University
1991-2022
Newcastle upon Tyne Hospital
2017-2018
Australian Nuclear Science and Technology Organisation
2002-2003
South West London and St George's Mental Health NHS Trust
2001
Johnson & Johnson (United Kingdom)
1997
Frenchay Hospital
1997
St George's Hospital
1980
Hester
1978
Institute of Science and Technology
1967-1972
Huntington's thesis is the repetitive trying to masquerade as original or profound! This book actually an expan sion of a 27-page article on Clash Civilisations pub lished by Huntingdon in Foreign Affairs summer 1993 (Volume No. 72, Issue No.3.) These 27 pages have now been expanded 321 pages. The purpose here examine relevance and validity his conclusions.
Single-molecule magnets (SMMs) have potential applications in high-density data storage, but magnetic relaxation times at elevated temperatures must be increased to make them practically useful. Bis-cyclopentadienyl lanthanide sandwich complexes emerged as the leading candidates for SMMs that show memory liquid nitrogen temperatures, mechanisms mediated by aromatic C5 rings not been fully established. Here we synthesize a bis-monophospholyl dysprosium SMM [Dy(Dtp)2][Al{OC(CF3)3}4] (1, Dtp =...
The use of magnetisation decay measurements to characterise very slow relaxation the in single-molecule magnets is becoming increasingly prevalent as times move longer timescales outside AC susceptibility range. However, experimental limitations and a poor understanding distribution underlying stretched exponential function, commonly used model data, may be leading misinterpretation results. Herein we develop guidelines on design, data fitting, analysis required accurately interpret...
Compression creep measurements at constant load on ZrO 2 ‐6 mol% Sc O 3 (grain size ∼1 μm), Y ∼17 and heat‐treated ∼2 μm) yield activation energies of 89, 86, 74 kcal/mol, respectively. The rates are linearly proportional to the inverse square grain material. A stress exponent, n , 1.5 was found for scandia‐doped zirconia two regimes, with =1 6, were yttria‐doped zirconia. These data, supported by metallographic evidence, interpreted as showing that is associated cation diffusion control...
A phase diagram is proposed for the system UO 2 ‐ZrO on basis of earlier work and results new studies in which mixed oxides were melted a solar furnace to avoid contamination. X‐ray diffraction measurements made specimens helium same after heating 1350°C. helium. The shows narrow two‐phase region about eutectic at high temperatures increases extent lower temperatures. high‐temperature form zirconia cannot be stabilized by addition .
The effects of external pressure on a high-performing dysprosocenium single-molecule magnet are investigated using combination X-ray diffraction, magnetometry and theoretical calculations. effective energy barrier (Ueff) decreases from ca. 1300 cm-1 at ambient to 1125 3 GPa. Our results indicate that compression < 1.2 GPa has negligible effect the Orbach process, but magnetic relaxation > 1 increases via Raman and/or quantum tunnelling magnetisation.
A dinuclear dysprosocenium dication has been synthesised that is bound together by weak interactions between {Dy(Cp*)2}+ fragments and neutral NEt3AlMe3 molecules. The axiality of the Dy3+ crystal fields are perturbed these equatorial but a relatively large effective barrier to magnetisation reversal 860(60) cm-1 magnetic hysteresis up 12 K observed.
A rare P–E π interaction between the lone pair of a planar P center and vacant p orbital at Ge or Sn provides efficient stabilization for P-substituted tetrylenes (R2P)2E (E = Ge, Sn) enables isolation first example compound with crystallographically authenticated P═Sn bond. Subtle changes in electronic properties bulky aryl substituents these compounds change preference versus pyramidal centers solid state; however, variable-temperature NMR spectroscopy indicates that solution species are...
The objective, in packing particles by vibration, is to increase the density of packing. main factors affecting this way are characteristics powder (size distribution, shape, surface condition) and vibration variables (frequency, amplitude, time). Other include segregation size shape also, for a multicomponent powder, particle density. wall effect container might also be expected influence its vicinity. An experimental investigation some these here reported.
We perform magnetization sweeps on the high-performing single-molecule magnet [Dy(Cpttt)2][B(C6F5)4] (Cpttt = C5H2tBu3-1,2,4; tBu C(CH3)3) to determine quantum tunneling gap of ground-state avoided crossing at zero-field, finding a value order 10-7 cm-1. In addition pure crystalline material, we also measure tunnel splitting dissolved in dichloromethane (DCM) and 1,2-difluorobenzene (DFB). find that concentrations 200 or 100 mM these solvents increases size compared sample, despite...
On decrit les cas de 2 malades qui ont presente une fracture du tibia a travers le siege d'une broche traction. Lorsque l'utilisation d'un traction dans l'os cortical ne peut etre evite on devrait avertir malade pas entreprendre activite intense jusqu'a ce que la perte substance soit comblee radiologiquement
The compaction process is examined in detail. It shown that, where particle deformation concerned, by rolling similar to static pressing, with the addition of elongation particles direction when pressure sufficiently high. A method for determining average roll described. comparison a metal powder solid bar, and determination effect shape mean size, indicates that not only roll/powder friction but also slip between plays an important role process. This leads examination flow properties...
Unusual arene⋯Ge/Sn interactions stabilise the rare diarsatetrylenes <bold>8Ge</bold>/<bold>Sn</bold> by up to 181 kJ mol<sup>−1</sup>.
An experimental study of go/no-go discrimination learning had previously indicated that individual differences in relate to childrens’ scores on the excitation/inhibition factor a classroom assessment scale. The current paper reports two observational studies which show this scale also relates aspects children's behaviour. In particular, frequency initiation interaction, amount speech, number approaches and likelihood interacting with teacher, were positively significantly related degree...
Abstract There is growing interest in compounds containing functionalized E=E multiple bonds (E=Si, Ge, Sn, Pb) because of their potential to exhibit novel physical and chemical properties. However, functionalizations are rare, with scarcity increasing degree substitution. The first ditetrelene R 2 E=ER which the bond substituted by four heteroatoms (other than Si) described. tetraphosphadisilene {(Mes) P} Si=Si{P(Mes) } ( 7 ) readily isolated from reaction between SiBr 4 [(Mes) P]Li, latter...
The reaction between (Dipp)2PH and one equivalent of n-BuLi, PhCH2Na or PhCH2K in THF gives the complexes [(Dipp)2P]Li(THF)3 (2a), {[(Dipp)2P]Na(THF)2}2 (3a) [(Dipp)2P]K(THF)4 (4a), respectively [Dipp = 2,6-iPr2C6H3]. Exposure these compounds to vacuum yields alternative solvates [(Dipp)2P]Li(THF)2 (2b), [(Dipp)2P]Na(THF)1.5 (3b), [(Dipp)2P]K (4b), respectively; adduct [(Dipp)2P]Na(PMDETA) (3c) was prepared by treatment 3a with PMDETA. Treatment (Dipp)(Mes)PH (Mes)2PH n-BuLi...