Layfield, Richard - The University of Manchester

个人简介

Reader in Inorganic Chemistry, School of Chemistry, The University of Manchester, 08/2013- University Lecturer in Inorganic Chemistry, School of Chemistry, The University of Manchester, 09/2007-07/2013 Temporary University Lecturer in Inorganic Chemistry, Department of Chemistry, University of Cambridge, 09/2004-08/2007 Denman Baynes Research Fellow, Clare College, Cambridge, 09/2002-08/2004 PhD in Inorganic Chemistry, Department of Chemistry, University of Cambridge, 10/1999-12/2002 MChem (Hons), School of Chemistry, University of Leeds, 09/1995-07/1999

研究领域

SYNTHETIC COORDINATION CHEMISTRY AND ORGANOMETALLIC CHEMISTRY MOLECULAR MAGNETISM, LANTHANIDE CHEMISTRY Lanthanide organometallics as precursors to single-molecule magnets In 2010, we reported the first example of an organometallic single-molecule magnet (SMM) the dysprosium dimer [Cp2Dy(bta)]2 (Cp = cyclopentadienyl; bta = benzotriazole) (Chem. Eur. J. 2010, 4442). Low-temperature ac magnetic susceptibility measurements on this compound in zero applied dc field reveal a strong frequency dependence of the out-of-phase susceptibility. The energy barrier to magnetization reversal is 46.5 K, one of the largest energy barriers observed for a lanthanide-only SMM. Alkali and and alkaline earth metal complexes of bifunctional allyl and pentadienyl carbanions We are interested in the fundamental structure and bonding within s-block metal complexes of allyl and pentadienyl anions (for a review see Dalton Trans., 2010, 2469). Our work in this area is oriented towards the applications of these compounds in regioselective organic synthesis. We are particularly interested in exploring the influence of s-block metal coordination by internal Lewis basic groups on the structure of the carbanions, which can be dramatically altered relative to their unfunctionalized analogues (Chem. Comm., 2008, 3142). Our work in this area combines X-ray crystallography and NMR spectroscopy with high-level computational chemistry with our collaborators (Eur. J. Inorg. Chem., 2009, 4157). Low-coordinate transition metal amides as precursors to cage and cluster compounds We are interested in the applications of low-coordinate transition metal amido complexes as precursors to polymetallic cage complexes. Of particular interest is the iron(II) silylamide [Fe{N(SiMe3)2}2] and its reactions with N-H acidic heterocycles. We have found that the cage complexes formed in these reactions possess a range of interesting structures and magnetic properties, such as the occurrence of very large zero-field splittings. This work was recently published as an ASAP article in Inorganic Chemistry.

近期论文

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A. Venugopal, F. Tuna, T. P. Spaniol, L. Ungur, L. F. Chibotaru, J. Okuda, R. A. Layfield. A hydride-ligated dysprosium single-molecule magnet. Chemical Communications. 2013; 49(9): 901-903. eScholarID:187642 | DOI:10.1039/C2CC38036F C. A. Smith, F. Tuna, M. Bodensteiner, M. Helliwell, D. Collison, R. A. Layfield*. Exchange-coupled oxygen- and sulfur-bridged cyclopentadienyl-manganese(II) cages. Dalton Trans. 2013; 41: 71-74. eScholarID:184095 | DOI:10.1039/C2DT32262E S. N. König, N. F. Chilton, C. Maichle-Mössmer, E. Moreno-Pineda, T. Pugh, R. Anwander, R. A. Layfield*. Fast magnetic relaxation in an octahedral dysprosium tetramethyl-aluminate complex. 2013 September; eScholarID:216012 | DOI:10.1039/C3DT52337C D. N. Woodruff, R. E. P. Winpenny, R. A. Layfield*. Lanthanide Single-Molecule Magnets. Chem. Rev. 2013; eScholarID:194135 | DOI:10.1021/cr400018q B. M. Day, T. Pugh, D. Hendriks, C. Fonseca Guerra, D. J. Evans, F. M. Bickelhaupt, R. A. Layfield. Normal-to-Abnormal Rearrangement and NHC Activation in Three-Coordinate Iron(II) Carbene Complexes. Journal of the American Chemical Society. 2013; 135(36): 13338-13341. eScholarID:205698 | DOI:10.1021/ja408589p R. A. Layfield*. Organometallic Single-Molecule Magnets. Organometallics. 2013; eScholarID:216015 T. Pugh and R. A. Layfield*. Reactivity of three-coordinate iron–NHC complexes towards phenylselenol and lithium phenylselenide. 2013 December; eScholarID:216014 | DOI:10.1039/C3DT53203H D. N. Woodruff, F. Tuna, M. Bodensteiner, R. E. P. Winpenny, R. A. Layfield*. Single-molecule magnetism in tetrametallic thiolate-bridged terbium and dysprosium cages. Organometallics. 2013; 32: 1224-1229. eScholarID:194127 | DOI:10.1021/om3010096 B. M. Day, J. Clayden, R. A. Layfield*. Structural influences in lithium pentadienylsilane complexes. Organometallics. 2013; 32: 4448-4451. eScholarID:205697 | DOI:10.1021/om400596y S. Scheuermayer, F. Tuna, M. Bodensteiner, E. Moreno-Pineda, M. Scheer and R. A. Layfield*. Transmetallation of chromocene by lithium-amide, -phosphide and -arsenide nucleophiles. Inorg. Chem. 2013; 52: 3878-3883. eScholarID:194134 | DOI:10.1021/ic3025815 F. Tuna, C. A. Smith, M. Bodensteiner, L. Ungur, L. F. Chibotaru, E. J. L. McInnes, R. E. P. Winpenny, D. Collison,* R. A. Layfield*. A high anisotropy barrier in a sulphur-bridged organodysprosium single-molecule magnet. Angewandte Chemie International Edition. 2012; 51(28): 6976-6980. eScholarID:160757 | DOI:10.1002/anie.201202497 M. J. Ingleson* and R. A. Layfield*. N-Heterocyclic carbene chemistry of iron: fundamentals and applications. Chem. Comm. 2012; 48: 3579-3589. eScholarID:156726 | DOI:10.1039/c2cc18021a S. A. Sulway, R. A. Layfield,* F. Tuna, W. Wernsdorfer and R. E. P. Winpenny*. Single-molecule magnetism in cyclopentadienyl-dysprosium chlorides. Chemical Communications. 2012; 48(10): 1508-1510. eScholarID:135209 | DOI:10.1039/C1CC14643B S. Scheuermayer, F. Tuna, M. Bodensteiner, M. Scheer, R. A. Layfield*. Spin crossover in phosphorus- and arsenic-bridged cyclopentadienyl-manganese(II) dimers. Chem. Comm. 2012; 48: 8087-8089. eScholarID:160756 | DOI:10.1039/C2CC32893C D. N. Woodruff, E. J. L. McInnes, D. O. Sells, R. E. P. Winpenny, R. A. Layfield*. Synthesis, structure and paramagnetism of manganese(II) imino-phosphate complexes. Inorg. Chem. 2012; 51: 9104-9109. eScholarID:184093 | DOI:10.1021/ic3014046