Výsledky vyhledávání - "Frank E. Sowrey"

A multinuclear solid state NMR study of the sol–gel formation of amorphous Nb2O5–SiO2 materials

Autor: Kieran O. Drake, Mark E. Smith, Daniela Carta, Frank E. Sowrey, Laura J. Skipper, Robert J. Newport

Publikováno v: Solid State Nuclear Magnetic Resonance. 27:28-36

Multinuclear 1H, 13C, 17O, 29Si MAS and 93Nb static NMR is reported from a series of sol–gel prepared (Nb2O5)x(SiO2)1−x materials with x = 0.03 , 0.075 or 0.30. 13C NMR shows that by 500 °C the organic precursor fragments have been removed altho

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bb45bace9ecb6759770dd9647de9793f
https://doi.org/10.1016/j.ssnmr.2004.08.008

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New insights into medium-range order around titanium in sol–gel derived silica through isotope difference neutron diffraction and reverse Monte Carlo modelling

Autor: Robert J. Newport, David M. Pickup, Mark E. Smith, Frank E. Sowrey, Kieran O. Drake

Publikováno v: Chemical Physics Letters. 392:503-507

Neutron diffraction with isotopic titanium substitution allows the nature of the cation sites to be determined beyond nearest-neighbor distances for the first time in a sol–gel derived titania–silica glass. Reverse Monte Carlo (RMC) modelling of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d3d73e3e7be0b4bef94593c9edbea0a5
https://doi.org/10.1016/j.cplett.2004.06.005

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Structural trends in copper(ii) bis(thiosemicarbazone) radiopharmaceuticals

Autor: Simon J. Teat, Jonathan R. Dilworth, Frank E. Sowrey, Michael J. Went, Andrew R. Cowley, Paul S. Donnelly, Philip J. Blower, Elena Labisbal, Thomas C. Castle

Publikováno v: Dalton Trans.. :4416-4425

Redox-related changes in biological properties of copper bis(thiosemicarbazone) radiopharmaceuticals are induced by backbone alkylation. To determine whether these changes are mediated by changes in core structural parameters, eight X-ray structures

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::04a0da71d49a0008fb1bef2834dbe048
https://doi.org/10.1039/b307499d

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Spin frustration and concealed asymmetry: structure and magnetic spectrum of [Fe3O(O2CPh)6(py)3]ClO4·py †

Autor: Upali A. Jayasooriya, Frank E. Sowrey, Annie K. Powell, Stephen M. Bennington, Christopher E. Anson, Roderick D. Cannon, Claire Tilford, Sigrid Wocadlo, Wouter Montfrooij

Publikováno v: Journal of the Chemical Society, Dalton Transactions. :862-866

The oxo-centred trinuclear complex [Fe3O(O2CPh)6(py)3]ClO4·py and its fully deuteriated analogue have been synthesized. X-Ray crystallography at T = 233 K shows that the complex has threefold symmetry, space group P63/m. Incoherent inelastic neutron

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::593b8005c66e2b6dfbb4f9864dbf5b4c
https://doi.org/10.1039/b008121n

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Direct measurement of the high-spin and low-spin bond lengths and the spin state population in mixed spin state systems: an Fe K-edge XAFS study of iron(III) dithiocarbamate complexes

Autor: Frank E. Sowrey, Nigel A. Young, Claudio Sangregorio, Charles J. O’Connor, Jon M. W. Seddon, Catherine M. McGrath, Ekkehard Sinn

Publikováno v: Inorganic Chemistry Communications. 2:536-539

A combination of Fe K-edge XAFS and advanced data analysis methods has been used to determine the Fe–S distances and spin state population in iron(III) dithiocarbamate spin crossover complexes. This new approach allows for the first direct determin

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::35e89ad3db63cc1bd2d908ea73d9e069
https://doi.org/10.1016/s1387-7003(99)00145-8

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Electron Localization and Delocalization in Mixed-Valence Transition Metal Clusters: Structural and Spectroscopic Studies of Oxo-Centered Trinuclear Complexes [Fe3O(OOCCMe3)6(py)3]+/0 and [Mn3O(OOCCMe3)6(py)3]+/0

Autor: Christopher E. Anson, Annie K. Powell, Ruowen Wu, Roderick D. Cannon, Mehmet Poyraz, Upali A. Jayasooriya, Frank E. Sowrey, Hirotoshi Sano, Sigrid Wocadlo, Tadahiro Nakamoto, Motomi Katada

Publikováno v: Inorganic Chemistry. 37:1913-1921

Crystal structures are reported for the following complexes [Fe3O(OOCCMe3)6(py)3]ClO4·0.5py, 1; [Mn3O(OOCCMe3)6(py)3]ClO4·MeCN, 2; [Mn3O(OOCCMe3)6(py)3], 4; [Fe3O(OOCCMe3)6(py)3], 5. Crystal data are as follows: 1, system monoclinic, space group P2

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9399df3af90f5f7385c69a27f8c1ac93
https://doi.org/10.1021/ic970451t

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NMR study of electron transfer between paramagnetic complexes Kinetics of the self-exchange reaction [Fe3O(O2CCMe3)6(py)3]+/0 (py=pyridine)

Autor: Colin J. MacDonald, Roderick D. Cannon, Frank E. Sowrey

Publikováno v: Journal of the Chemical Society, Faraday Transactions. 94:1571-1574

The kinetics of the electron transfer self-exchange reaction [Fe3O(O2CCMe3)6(py)3]+ + [Fe3O(O2CCMe3)6(py)3] ⇄ [Fe3O(O2CCMe3)6(py)3] + [Fe3O(O2CCMe3)6(py)3]+ have been measured by NMR line broadening. Both reactants are paramagnetic and it was possi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::97ca4a4468a5b02e94ac4d4621636373
https://doi.org/10.1039/a801051j

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Concealed Asymmetry in an Exchange-Coupled Trichromium(III) Cluster: Structure and Magnetic Spectrum of [Cr3O(OOCPh)6(py)3](py)0.5ClO4

Autor: Claire Tilford, John P. Bourke, Alastair Little, Roderick D. Cannon, Robin D. Rogers, Gordon J. Kearley, John B. Vincent, Frank E. Sowrey, Upali A. Jayasooriya

Publikováno v: Inorganic Chemistry. 37:5675-5677

The compound [Cr3O(OOCPh)6(py)3](py)ClO4 crystallizes in a lattice of threefold symmetry with the trichromium clusters forming equilateral trianges at 173 K, but at 1.5 K the neutron scattering spe...

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::20c57a110890912ffaf1f38229a02921
https://doi.org/10.1021/ic980188b

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The use of advanced diffraction methods in the study of the structure of a bioactive calcia: silica sol-gel glass

Autor: Robert J. Newport, Larry L. Hench, Frank E. Sowrey, David M. Pickup, Daniela Carta, Mark E. Smith, Laura J. Skipper, Priya Saravanapavan

Publikováno v: Journal of materials science. Materials in medicine. 17(11)

Sol-gel derived calcium silicate glasses may be useful for the regeneration of damaged bone. The mechanism of bioactivity is as yet only partially understood but has been strongly linked to calcium dissolution from the glass matrix. In addition to th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::88bfca3175ddbc7b50b409c2028bf110
https://pubmed.ncbi.nlm.nih.gov/17122911

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The atomic-scale interaction of bioactive glasses with simulated body fluid

Autor: Frank E. Sowrey, Mark E. Smith, Priya Saravanapavan, David M. Pickup, Larry L. Hench, Zhongjie Lin, Robert J. Newport, Laura J. Skipper, Kieran O. Drake

The formation of a carbonate-containing hydroxyapatite, HCAp, layer on bioactive calcium silicate sol-gel glass of the formula (CaO)0.3(SiO2)0.7 has been studied in-vitro in Simulated Body Fluid (SBF). Extended X-ray Absorption Fine Structure (EXAFS)

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5a13b2fb7f5dfe87691d1549719f5229
https://kar.kent.ac.uk/8226/1/Atomic_scale_Interaction_of_bioactive_glasses.pdf

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