Spin Crossover In Iron Ii And Cobalt Ii Complexes Including Multifunctional Materials
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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.
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 And Mesogenic Properties Of Cobalt Ii And Iron Ii Complexes With Ligands Derived From 2 6 Pyridinedicarboxaldehtde And 1 Aminiakanes
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Author : Nur Linahafizza Mohd Noor
language : en
Publisher:
Release Date : 2015
Spin Crossover And Mesogenic Properties Of Cobalt Ii And Iron Ii Complexes With Ligands Derived From 2 6 Pyridinedicarboxaldehtde And 1 Aminiakanes written by Nur Linahafizza Mohd Noor and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
Spin Crossover In Transition Metal Compounds Ii
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Author : Philipp Gütlich
language : en
Publisher: Springer Science & Business Media
Release Date : 2004-07-23
Spin Crossover In Transition Metal Compounds Ii 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 2004-07-23 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 Complexes
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Author : Kazuyuki Takahashi MDPI
language : en
Publisher: MDPI
Release Date : 2018-06-26
Spin Crossover Complexes written by Kazuyuki Takahashi MDPI and has been published by MDPI this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-06-26 with Electronic books categories.
This book is a printed edition of the Special Issue "Spin-Crossover Complexes" that was published in Inorganics
Spin Labile Conducting Metallopolymers
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Author : Brandon Djukic
language : en
Publisher:
Release Date : 2011
Spin Labile Conducting Metallopolymers written by Brandon Djukic and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
Synthesis And Applications Of New Spin Crossover Compounds
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Author : Takafumi Kitazawa
language : en
Publisher: MDPI
Release Date : 2019-10-11
Synthesis And Applications Of New Spin Crossover Compounds written by Takafumi Kitazawa and has been published by MDPI this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-10-11 with Science categories.
The crystal chemistry of spin crossover (SCO) behavior in coordination compounds can potentially be in association with smart materials—promising materials for applications as components of memory devices, displays, sensors and mechanical devices and, especially, actuators, such as artificial muscles. This Special Issue is devoted to various aspects of SCO and related research, comprising 18 interesting original papers on valuable and important SCO topics. Significant and fundamental scientific attention has been focused on the SCO phenomena in a wide research range of fields of fundamental chemical and physical and related sciences, containing the interdisciplinary regions of chemical and physical sciences related to the SCO phenomena. Coordination materials with bistable systems between the LS and the HS states are usually triggered by external stimuli, such as temperature, light, pressure, guest molecule inclusion, soft X-ray, and nuclear decay. Since the first Hofmann-like spin crossover (SCO) behavior in {Fe(py)2[Ni(CN)4]}n (py = pyridine) was demonstrated, this crystal chemistry motif has been frequently used to design Fe(II) SCO materials to enable determination of the correlations between structural features and magnetic properties.
Molecular Materials
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Author : Duncan W. Bruce
language : en
Publisher: John Wiley & Sons
Release Date : 2011-04-04
Molecular Materials written by Duncan W. Bruce 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 2011-04-04 with Technology & Engineering categories.
“... the book does an excellent job of putting together several different classes of materials. Many common points emerge, and the book may facilitate the development of hybrids in which the qualities of the “parents” are enhanced.” –Angew. Chem. Int. Ed. 2011 With applications in optoelectronics and photonics, quantum information processing, nanotechnology and data storage, molecular materials enrich our daily lives in countless ways. These materials have properties that depend on their exact structure, the degree of order in the way the molecules are aligned and their crystalline nature. Small, delicate changes in molecular structure can totally alter the properties of the material in bulk. There has been increasing emphasis on functional metal complexes that demonstrate a wide range of physical phenomena. Molecular Materials represents the diversity of the area, encapsulating magnetic, optical and electrical properties, with chapters on: Metal-Based Quadratic Nonlinear Optical Materials Physical Properties of Metallomesogens Molecular Magnetic Materials Molecular Inorganic Conductors and Superconductors Molecular Nanomagnets Structured to include a clear introduction, a discussion of the basic concepts and up-to-date coverage of key aspects, each chapter provides a detailed review which conveys the excitement of work in that field. Additional volumes in the Inorganic Materials Series: Low-Dimensional Solids | Molecular Materials | Porous Materials | Energy Materials
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.
Isiame 2008
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Author : Ernö Kuzmann
language : en
Publisher: Springer Science & Business Media
Release Date : 2009-06-16
Isiame 2008 written by Ernö Kuzmann 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 2009-06-16 with Science categories.
Proceedings of the International Symposium on the Industrial Applications of the Mössbauer Effect (ISIAME 2008) held in Budapest, Hungary, 17-22 August 2008 E. Kuzmann and K. Lázár (Eds.) This book provides an excellent overview on the most recent results on the industrial applications of Mössbauer spectroscopy attained on the fields of nanotechnology, metallurgy, biotechnology and pharmaceutical industry, applied mineralogy, energy production industry (coal, oil, nuclear, solar, etc.), computer industry, space technology, electronic and magnetic devices technology, ion implantation technology, including topics like characterization of novel construction materials, electronic components and magnetic materials, composite materials, colloids, amorphous and nanophase materials, small particles, coatings, interfaces, thin films and multilayers, catalysis, corrosion, tribology, surface modification, hydrogen storage, ball milling, radiation effects, electrochemistry, batteries, etc. From the various reports a broad overview emerges illustrating that the method can successfully be applied in a wide variety of topics.