Thermal And Light Induced Spin Crossover In Cobalt Ii Imine Complexes And In The Polymeric Network Fe Bbtr 3 Cio4 2
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Thermal And Light Induced Spin Crossover In Cobalt Ii Imine Complexes And In The Polymeric Network Fe Bbtr 3 Cio4 2
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Author : Itana S. Krivokapic
language : en
Publisher:
Release Date : 2009
Thermal And Light Induced Spin Crossover In Cobalt Ii Imine Complexes And In The Polymeric Network Fe Bbtr 3 Cio4 2 written by Itana S. Krivokapic and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.
Spin Crossover Materials
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Author : Malcolm A. Halcrow
language : en
Publisher: John Wiley & Sons
Release Date : 2013-01-07
Spin Crossover Materials written by Malcolm A. Halcrow and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-01-07 with Science categories.
The phenomenon of spin-crossover has a large impact on the physical properties of a solid material, including its colour, magnetic moment, and electrical resistance. Some materials also show a structural phase change during the transition. Several practical applications of spin-crossover materials have been demonstrated including display and memory devices, electrical and electroluminescent devices, and MRI contrast agents. Switchable liquid crystals, nanoparticles, and thin films of spin-crossover materials have also been achieved. Spin-Crossover Materials: Properties and Applications presents a comprehensivesurvey of recent developments in spin-crossover research, highlighting the multidisciplinary nature of this rapidly expanding field. Following an introductory chapter which describes the spin-crossover phenomenon and historical development of the field, the book goes on to cover a wide range of topics including Spin-crossover in mononuclear, polynuclear and polymeric complexes Structure: function relationships in molecular spin-crossover materials Charge-transfer-induced spin-transitions Reversible spin-pairing in crystalline organic radicals Spin-state switching in solution Spin-crossover compounds in multifunctional switchable materials and nanotechnology Physical and theoretical methods for studying spin-crossover materials Spin-Crossover Materials: Properties and Applications is a valuable resource for academic researchers working in the field of spin-crossover materials and topics related to crystal engineering, solid state chemistry and physics, and molecular materials. Postgraduate students will also find this book useful as a comprehensive introduction to the field.
Spin Crossover In Transition Metal Compounds Ii
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Author : Philipp Gütlich
language : en
Publisher: Springer
Release Date : 2004-07-23
Spin Crossover In Transition Metal Compounds Ii written by Philipp Gütlich and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004-07-23 with Science categories.
Table of contents C.N.R. Rao, M.M. Seikh, C. Narayana: Spin-State Transition in LaCoO3 and Related Materials .- H.A. Goodwin: Spin Crossover in Cobalt(II) Systems .- Y. Garcia, P.G tlich: Thermal Spin Crossover in Mn(II), Mn(III) Cr(II) and Co(III) Coordination Compounds .- D.N. Hendrickson, C.G. Pierpont: Valence Tautomeric Transition Metal Complexes .- P. Guionneau, M. Marchivie, G.Bravic, J.-F. Letard, D. Chasseau: Structural Aspects of Spin Crossover. Example of the [Fe(II)Ln(NCS)2] Complexes .- J. Kusz, P. G tlich, H. Spiering: Structural Investigations of Tetrazole Complexes of Iron(II) .- A. Hauser: Light-Induced Spin Crossover and the High-Spin Low-Spin Relaxation .- F. Varret, K. Boukheddaden, E. Codjovi, C. Enachescu, J. Linar s: On the Competition Between Relaxation and Photoexcitations in Spin Crossover Solids under Continuous Irradiation .- P. G tlich: Nuclear Decay Induced Excited Spin State Trapping (NIESST) .- M.-L. Boillot, J. Zarembowitch, A. Sour: Ligand-Driven Light-Induced Spin Change (LD-LISC): A Promising Photomagnetic Effect
Spin Crossover In Iron Ii And Cobalt Ii Complexes Including Multifunctional Materials
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Author : Hayley Sue Scott
language : en
Publisher:
Release Date : 2014
Spin Crossover In Iron Ii And Cobalt Ii Complexes Including Multifunctional Materials written by Hayley Sue Scott and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.
At the outset, the primary focus of this Ph.D. project has been directed towards the synthesis of new 2,2'-dipyridylamino(dpa)- and 1,2,4-triazole(trz)- based ligands to be incorporated into spin crossover (SCO) iron(II) complexes.Initial aims sought the synthesis of a wide and diverse range of SCO compounds containingnovel dpa- and trz-based ligands in order to determine what sort of control could be exercised over magnetic properties. New ligands synthesised for the project incorporated a range of nondpa- or trz-substituents with, for example, different capacities to participate in hydrogen bonding or aryl interactions (such as !-stacking), with different degrees of bulkiness, flexibility, or additional binding sites, for metals or other guests, that are distinct and separate from the dpa or trz coordination sites. This fundamental study also probed the influence of second coordination sphere entities, including the effects of solvation and counter ion species, upon the spin transition. Structure-function correlations for this work were vital to further the understanding of the factors influential in determining the magnetic properties of crystalline SCO compounds, by varying the nature of the ligand, solvent or counter-ion.As there is currently great interest in the study of multifunctional ('hybrid') molecular materials, a further aspect of this Ph.D. project was aimed towards the synthesis of ligands incorporating a moiety capable of a secondary function, in addition to SCO. This led to two main areas of study, the first of which consisted of the synthesis and coordination of a number of ferrocene-appended ligands and attempts have been made to analyse how one-electron changes at the ferrocene group (located external to the coordination site) influences the spin transition. This includes a system in which a new ferrocene-trz ligand and its 1-D polynuclear complexes were studied using magnetic, electrochemical and Mössbauer measurements (Chapter 6), as well as synthesis of discrete FeII and CoII complexes incorporating ferrocene-based ligands (Chapter 7).Our second approach at obtaining multifunctional SCO materials has led us to pursue the synthesis and coordination of crown-appended dpa-based ligands which have the potential to show, in addition to SCO, encapsulation of alkali metal ions in the aza-crown ether, which ideally would result in guest dependent magnetic properties. This work appears in Chapter 4.Throughout this study, where possible, all complexes have been comprehensively characterised, primarily using single crystal X-ray structural determination and variable temperature magneticsusceptibility measurements, although the vast array of complexes appearing in this thesis have been characterised using a number of other techniques including PXRD, Mössbauer spectroscopy, electrochemical studies, magnetic- and photo-magnetic measurements and to a lesser extent heat-capacity measurements.
Photochromic Materials
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Author : He Tian
language : en
Publisher: John Wiley & Sons
Release Date : 2016-06-16
Photochromic Materials written by He Tian and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-06-16 with Technology & Engineering categories.
Summarizing all the latest trends and recent topics in one handy volume, this book covers everything needed for a solid understanding of photochromic materials. Following a general introduction to organic photochromic materials, the authors move on to discuss not only the underlying theory but also the properties of such materials. After a selection of pplications, they look at the latest achievements in traditional solution-phase applications, including photochromic-based molecular logic operations and memory, optically modulated supramolecular system and sensors, as well as light-tunable chemical reactions. The book then describes the hotspot areas of photo-switchable surfaces and nanomaterials, photochromic-based luminescence/electronic devices and bulk materials together with light-regulated biological and bio-chemical systems. The authors conclude with a focus on current industrial applications and the future outlook for these materials. Written with both senior researchers and entrants to the field in mind.
Spin Crossover In Transition Metal Compounds I
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Author : Philipp Gütlich
language : en
Publisher: Springer Science & Business Media
Release Date : 2004-05-12
Spin Crossover In Transition Metal Compounds I written by Philipp Gütlich and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004-05-12 with Science categories.
With contributions by numerous experts
Ferroelectric Domain Walls
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Author : Jill Guyonnet
language : en
Publisher: Springer Science & Business Media
Release Date : 2014-04-08
Ferroelectric Domain Walls written by Jill Guyonnet and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-04-08 with Science categories.
Using the nano metric resolution of atomic force microscopy techniques, this work explores the rich fundamental physics and novel functionalities of domain walls in ferroelectric materials, the nano scale interfaces separating regions of differently oriented spontaneous polarization. Due to the local symmetry-breaking caused by the change in polarization, domain walls are found to possess an unexpected lateral piezoelectric response, even when this is symmetry-forbidden in the parent material. This has interesting potential applications in electromechanical devices based on ferroelectric domain patterning. Moreover, electrical conduction is shown to arise at domain walls in otherwise insulating lead zirconate titanate, the first such observation outside of multiferroic bismuth ferrite, due to the tendency of the walls to localize defects. The role of defects is then explored in the theoretical framework of disordered elastic interfaces possessing a characteristic roughness scaling and complex dynamic response. It is shown that the heterogeneous disorder landscape in ferroelectric thin films leads to a breakdown of the usual self-affine roughness, possibly related to strong pinning at individual defects. Finally, the roles of varying environmental conditions and defect densities in domain switching are explored and shown to be adequately modelled as a competition between screening effects and pinning.
Symmetry In Crystallography
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Author : Paolo Radaelli
language : en
Publisher: Oxford University Press, USA
Release Date : 2011-09-22
Symmetry In Crystallography written by Paolo Radaelli and has been published by Oxford University Press, USA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-09-22 with Mathematics categories.
A fresh approach to teaching crystallographic symmetry. Rather than being swamped by heavy algebraic notation, the reader is taken through a series of simple and beautiful examples from the visual arts, and taught how to analyse them employing the 'pictorial' diagrams used in the International Tables of Crystallography.
Multifunctional Molecular Magnets Based On Octacyanidometalates
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Author : Kenta Imoto
language : en
Publisher: Springer
Release Date : 2017-08-08
Multifunctional Molecular Magnets Based On Octacyanidometalates written by Kenta Imoto and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-08-08 with Science categories.
This thesis demonstrates the novel magnetic functionalities in cyanido-bridged metal assemblies, and as such appeals to readers in the field of materials science. The utilization of octacyanidometalates as building blocks enables the observation of (i) photo-induced magnetization due to a light-induced spin-crossover in an iron octacyanidoniobate-based assembly, (ii) photo-induced magnetization with a two-step spin-crossover behavior in an iron octacyanidoniobate-based material, and (iii) the coexistence of super-ionic conductivity and metamagnetism in a manganese-octacyanoniobate system. These multi-functionalities are achieved by incorporating a spin-crossover moiety or a hydrogen-bonding network into a cyanido-bridged network structure with a strong magnetic interaction. In particular, in light-induced spin-crossover magnets, a magnetically non-ordered state can be altered to a magnetically ordered state by photo-irradiation, which is one of the attractive mechanisms for novel optical switching devices.
Anion Sensing
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Author : Eric V. Anslyn
language : en
Publisher: Springer Science & Business Media
Release Date : 2005-05-06
Anion Sensing written by Eric V. Anslyn and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005-05-06 with Science categories.
with contributions by numerous experts