Molecular Cluster Magnets

DOWNLOAD

Download Molecular Cluster Magnets PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Molecular Cluster Magnets book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page

Molecular Cluster Magnets

DOWNLOAD
Author : Richard Winpenny
language : en
Publisher: World Scientific
Release Date : 2012

Molecular Cluster Magnets written by Richard Winpenny and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Science categories.

This work covers new developments in the field of molecular nanomagnetism, complementing previous books in this area (for example the volume by Gatteschi, Sessoli and Villain on Single Molecule Magnets). The book is written by experts in the field and is intended as a compilation of critical reviews of new areas rather than a comprehensive text.

Molecular Nanomagnets And Related Phenomena

DOWNLOAD
Author : Song Gao
language : en
Publisher: Springer
Release Date : 2015-02-20

Molecular Nanomagnets And Related Phenomena written by Song Gao and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-02-20 with Science categories.

The series Structure and Bonding publishes critical reviews on topics of research concerned with chemical structure and bonding. The scope of the series spans the entire Periodic Table and addresses structure and bonding issues associated with all of the elements. It also focuses attention on new and developing areas of modern structural and theoretical chemistry such as nanostructures, molecular electronics, designed molecular solids, surfaces, metal clusters and supramolecular structures. Physical and spectroscopic techniques used to determine, examine and model structures fall within the purview of Structure and Bonding to the extent that the focus is on the scientific results obtained and not on specialist information concerning the techniques themselves. Issues associated with the development of bonding models and generalizations that illuminate the reactivity pathways and rates of chemical processes are also relevant. The individual volumes in the series are thematic. The goal of each volume is to give the reader, whether at a university or in industry, a comprehensive overview of an area where new insights are emerging that are of interest to a larger scientific audience. Thus each review within the volume critically surveys one aspect of that topic and places it within the context of the volume as a whole. The most significant developments of the last 5 to 10 years should be presented using selected examples to illustrate the principles discussed. A description of the physical basis of the experimental techniques that have been used to provide the primary data may also be appropriate, if it has not been covered in detail elsewhere. The coverage need not be exhaustive in data, but should rather be conceptual, concentrating on the new principles being developed that will allow the reader, who is not a specialist in the area covered, to understand the data presented. Discussion of possible future research directions in the area is welcomed. Review articles for the individual volumes are invited by the volume editors. Readership: research scientists at universities or in industry, graduate students Special offer for all customers who have a standing order to the print version of Structure and Bonding, we offer free access to the electronic volumes of the Series published in the current year via SpringerLink.

Molecular Nanomagnets

DOWNLOAD
Author : Dante Gatteschi
language : en
Publisher: OUP Oxford
Release Date : 2011-04-14

Molecular Nanomagnets written by Dante Gatteschi and has been published by OUP Oxford this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-04-14 with Science categories.

Nanomagnetism is a rapidly expanding area of research which appears to be able to provide novel applications. Magnetic molecules are at the very bottom of the possible size of nanomagnets and they provide a unique opportunity to observe the coexistence of classical and quantum properties. The discovery in the early 90's that a cluster comprising twelve manganese ions shows hysteresis of molecular origin, and later proved evidence of quantum effects, opened a new research area which is still flourishing through the collaboration of chemists and physicists. This book is the first attempt to cover in detail the new area of molecular nanomagnetism, for which no other book is available. In fact research and review articles, and book chapters are the only tools available for newcomers and the experts in the field. It is written by the chemists originators and by a theorist who has been one of the protagonists of the development of the field, and is explicitly addressed to an audience of chemists and physicists, aiming to use a language suitable for the two communities.

Macroscopic Quantum Phenomenon In Molecular Magnets

DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2003

Macroscopic Quantum Phenomenon In Molecular Magnets written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.

(Uncorrected OCR) Abstract of thesis entitled MACROSCOPIC QUANTUM PHENOMENON IN MOLECULAR MAGNETS submitted by Hu Jianming for the Degree of Master of Philosophy at The University of Hong Kong in July 2003 Richard Feynman said that physical laws do not imply any limitation on our ability to construct and assemble objects at the atomic scale. Since compact and well-constructed materials can make functional devices smaller and more effective, considerable efforts have been made to synthesize better materials. Single molecular magnets(SMMs), in which molecular clusters are usually fixed in the crystal and have well isolated structures, become excellent candidates in building such kind of materials. Typically, molecular magnets have large uniaxial magnetic anisotropy which form energy barriers and force the spin of the molecules be either up or down. In the absence of the external magnetic field, the energy of states with spin up and spin down degenerates. Such degeneracy is removed under the influence of the external magnetic field. For several specific external magnetic fields, energy splitting can be found around the resonant points. The energy splitting between the states may induce quantum tunnelling which produces a sudden change in the magnetization of the samples. Thanks to the highy-sensitive techniques, such as micro-SQUID and HF-EPR etc., energy splitting can be determined quantitatively in experiments with extremely high precision. In present thesis, several experimental techniques are introduced briefly, and then a specific discussion on the three SMMs and the dimer of SMMs. The importance of the second and the forth order terms on inducing the energy splitting is identified by our numerical calculations. In addition, comparison between the theoretical and numerical periods of the quantum phase interference on several SMMs is performed. The newly synthesized dimer of SMMs does provide us a good chance to discuss the interaction between the molecular cluster.

Introduction To Molecular Magnetism

DOWNLOAD
Author : Cristiano Benelli
language : en
Publisher: John Wiley & Sons
Release Date : 2015-04-16

Introduction To Molecular Magnetism written by Cristiano Benelli 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 2015-04-16 with Science categories.

This first introduction to the rapidly growing field of molecular magnetism is written with Masters and PhD students in mind, while postdocs and other newcomers will also find it an extremely useful guide. Adopting a clear didactic approach, the authors cover the fundamental concepts, providing many examples and give an overview of the most important techniques and key applications. Although the focus is one lanthanide ions, thus reflecting the current research in the field, the principles and the methods equally apply to other systems. The result is an excellent textbook from both a scientific and pedagogic point of view.

Single Molecule Magnets And Multifunctional Molecular Magnetic Materials Based On Polynuclear Metal Complexes

DOWNLOAD
Author : Dimitrios Alexandropoulos
language : en
Publisher:
Release Date : 2016

Single Molecule Magnets And Multifunctional Molecular Magnetic Materials Based On Polynuclear Metal Complexes written by Dimitrios Alexandropoulos and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.

The Chemistry Of Nanostructured Materials

DOWNLOAD
Author : Peidong Yang
language : en
Publisher: World Scientific
Release Date : 2011

The Chemistry Of Nanostructured Materials written by Peidong Yang and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Science categories.

This book is a sequel to the first volume of The Chemistry of Nanostructured Materials. It covers the most exciting developments in the nanostructured materials field for the past five to ten years, with a particular focus on their applications in energy conversion and energy storage. Prominent authors of recognized authority in the field contribute their expertise in the review chapters.

Molecule Based Magnetic Materials

DOWNLOAD
Author : Mark M. Turnbull
language : en
Publisher:
Release Date : 1996

Molecule Based Magnetic Materials written by Mark M. Turnbull and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Language Arts & Disciplines categories.

Presents a mixture of tutorial chapters on theoretical and practical aspects of molecular magnetism, as well as chapters describing the most recent developments in the field. Provides a comprehensive review of organic molecule-based materials. Includes an introductory section that highlights the theory and instrumental techniques commonly employed in the field. Discusses finite systems such as organic and metal-based dimers, oligomers, and cluster molecules. Describes extended organic systems and extended metal-based systems.

Directed Assembly Of Single Molecule And Single Chain Magnets

DOWNLOAD
Author : Thomas Harris
language : en
Publisher:
Release Date : 2010

Directed Assembly Of Single Molecule And Single Chain Magnets written by Thomas Harris and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.

The work herein describes the design, synthesis, and characterization of magnetic molecules and chain compounds, with an emphasis on probing slow magnetic relaxation. Chapter 1 presents an extensive survey of the literature of cyano-bridged single-molecule and single-chain magnets, focusing on a building block approach wherein simple cyanometalate precursor complexes direct the assembly of larger architectures. Specific synthetic strategies to obtain multinuclear clusters and chain compounds of desired structure and magnetic properties are outlined in detail. Finally, perspectives on the future directions in the field are presented. Chapter 2 exemplifies the utility of the building block approach in generating high-nuclearity cyano-bridged clusters. It describes the design and synthesis of the facially-capped tricyanide building unit, [TpCr(CN)3]-, as its incorporation into the face-centered cubic cluster [Tp8(H2O)6Cu6Cr8(CN)24]4+. Ferromagnetic exchange between CrIII and CuII ions gives rise to an S = 15 spin ground state, one of the highest yet observed for a cyano-bridged cluster. In addition, the formation of this cluster is accompanied by a linkage isomerism of 12 of the 24 cyanide ligands, providing the first example of a molecule undergoing partial cyanide isomerism. Chapter 3 presents a survey of actinide-containing molecules that have demonstrated evidence of magnetic exchange coupling. The strong magnetic anisotropy characteristic of these elements marks them as promising candidates for single-molecule magnets, however the spin-orbit coupling that gives rise to this anisotropy also complicates analysis of exchange interactions. Current methods for extracting coupling information in these systems are outlined in detail. In addition, molecules that bear exchange-coupled centers but as of yet have not been thoroughly characterized are presented. Chapter 4 describes a detailed investigation of a series of iron(II) pyrrolide complexes of formulae [(tpaR)Fe]-, representing the first examples of transition metal-based mononuclear single-molecule magnets. Static magnetic measurements and high-field EPR spectroscopy reveal the presence of exceptionally strong uniaxial anisotropy in the complexes. Moreover, dynamic magnetic measurements carried out in a small dc field demonstrate that this anisotropy leads to slow relaxation in the complexes. In addition, this relaxation dynamics is probed through Mössbauer spectroscopy, which reveals that the phenomenon occurs in zero applied field in at least two complexes. Chapter 5 describes the synthesis and characterization of a series of cyano-bridged single-chain magnets. Reaction of the S = 3/2, high-anisotropy building unit [ReCl4(CN)2]2- with [M(DMF)6]2+ (M = Mn, Fe, Co, Ni) is shown to direct the formation of the chain compounds (DMF)4MReCl4(CN)2. Dc susceptibility measurements uncover the presence of intrachain antiferromagnetic (Mn) and ferromagnetic (Fe, Co, Ni) exchange. Most importantly, ac susceptibility measurements reveal that all of the chain compounds exhibit slow magnetic relaxation at low temperature. Notably, the Fe congener displays significant magnetic hysteresis at low temperatures, thus demonstrating classical magnet-like behavior in a one-dimensional system. Chapter 6 describes the synthesis the incorporation of [ReCl4(CN)2]2- into the zig-zag chain compound (Bu4N)[TpCuReCl4(CN)2], which is found to demonstrate the strongest ferromagnetic exchange yet observed through cyanide. The strong coupling arises from judicious selection of ReIV and CuII ions, whose molecular orbitals interact through the cyanide bridge such that orbital overlap is minimized. Moreover, the compound is shown to display metamagnetic behavior, and the complete magnetic phase diagram is elucidated through a combination of experimental and theoretical analysis. Finally, the anisotropy tensors of the ReIV centers are shown to cancel, leading to a small effective chain anisotropy and thus the absence of single-chain magnet behavior. Chapter 7 concludes this work by demonstrating that [ReCl4(CN)2]2- can also be employed in the assembly of molecular magnets, as it presents the synthesis and characterization of two linear trinuclear clusters of formulae [(PY5Me2)2M2ReCl4(CN)2]2+ (M = Mn, Ni; PY5Me2 = 2,6-bis(1,1-bis(2-pyridyl)ethyl)-pyridine). Dc susceptibility measurements reveal the presence of antiferromagnetic exchange in the Mn congener, while ferromagnetic exchange is observed in the Ni analogue. In addition, dc magnetization experiments show the presence of axial magnetic anisotropy in both clusters.

Single Molecule Magnets And Related Phenomena

DOWNLOAD
Author : Richard Winpenny
language : en
Publisher: Structure and Bonding
Release Date : 2006-06-22

Single Molecule Magnets And Related Phenomena written by Richard Winpenny and has been published by Structure and Bonding this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006-06-22 with Science categories.

With contributions by numerous experts