Molecular cluster magnets

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Molecular cluster magnets / editor, Richard Winpenny

資料種別:: 図書
出版情報:: Toh Tuck Link, Singapore : World Scientific, c2012
形態:: xii, 299 p. ; 24 cm
シリーズ名:: World scientific series in nanoscience and nanotechnology ; v. 3 <BB03602204>
著者名:: Winpenny, Richard
ISBN:: 9789814322942 [9814322946]
書誌ID:: BB0728134X

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注記:

Includes bibliographical references and index

主題:

Magnetochemistry; Nanostructured materials--Magnetic properties

言語:

英語

目次情報:

Preface

Supramolecular Polymetallic 2D [n × n] Transition Metal Grids - Approaches to Ordered Molecular Assemblies and Functional Molecular Devices / Laurence K Thompson ; Louise N Dawe ; Konstantin V Shuvaev1：

Convergent Self-assembly

Introduction and overview / 1.1：

Polytopic ligands for [n × n] square grids-design and self-assembly / 1.2：

Thermodynamic aspects of the formation of convergent self-assembled grid architectures / 1.3：

Ligands and Complexes / 2：

Ditopic ligands and their complexes / 2.1：

Homometallic complexes / 2.1.1：

[2×2] grids with heterocyclic diazine (N₂) bridging ligands / 2.1.1.1：

Ditopic ligands with more remote coordination pockets / 2.1.1.2：

Other polynuclear oligomers with remote ditopic ligands / 2.1.1.3：

[2 × 2] grids with single atom μ-O and μ-S bridging ditopic ligands / 2.1.1.4：

Ditopic hydrazone ligands with both μ-O or μ-NN bridging modes / 2.1.1.5：

Higher order oligomeric clusters based on ditopic ligands / 2.1.1.6：

Heterometallic [2 × 2] and mixed spin state grids / 2.1.2：

Symmetric tritopic ligands and their complexes / 2.2：

Homometallic [3 × 3] grids / 2.2.1：

Heterometallic and mixed spin state [3×3] grids / 2.2.2：

Tetratopic ligands and complexes / 2.3：

Homometallic [4 × 4] grids / 2.3.1：

Pentatopic ligands and their complexes / 2.4：

Homometallic [5 × 5] grids / 2.4.1：

Other Oligomers in the Assembly Process / 3：

Incomplete grids, clusters and chains / 3.1：

Nano-scale Molecular-Based Devices? / 4：

Conclusions and Future Perspectives / 5：

References

Recent Synthetic Results Involving Single Molecule Magnets / Guillem Aromí ; Eric J L Mclnnes ; Richard E P Winpenny

Introduction

A Brief Introduction to the Physics of SMMs

Further SMMs Based on Mn(III)

The largest SMM; a [Mn₈₄] torus

Record spin number, S_T = 83/2, but no slow relaxation / 3.2：

Record magnetic anisotropy barrier; a Mn₆ cluster / 3.3：

Quantum entanglement between SMMs; first discovered in a pair of Mn₄ clusters / 3.4：

[Mn₃^{III Mn^IV] clusters with an S = 9/2 ground state / 3.5：}

The [Mn₂^{III Mn₂^II] family of "rhombic" SMMs / 3.6：}

Oxime bridged SMMs with the core [Mn₃^{IIIO] and S_T = 6 / 3.7：}

Magnetostructural correlations within a family of [Mn₆^{III] SMMs / 3.8：}

MMs Based on Fe(III) Ions

New SMMs Based on Divalent 3d-Ions

Slow Relaxation in Complexes Involving 4f-Elements / 6：

Single atom magnets / 6.1：

Polymetallic 4f-complexes / 6.2：

Heterometallic 3d-4f SMMs / 6.3：

Metallocyanate Based SMMs / 7：

Conclusions / 8：

The Nanoscopic V₁₅ Cluster: A Unique Magnetic Polyoxometalate / Boris Tsukerblat ; Alex Tarantul

The Unique Magnetic Polyoxometalate V₁₅

Structure and Superexchange Pathways

Exchange Interactions within the Triangle Model

Isotropic exchange within the triangle model

æAccidental' degeneracy and spin-frustration

Pseudo-angular momentum representation

Antisymmetric exchange, zero-field splitting

Ab initio calculations

Zeeman Levels, Magnetic Anisotropy

Electron Paramagnetic Resonance

EPR spectrum of V₁₅: Role of antisymmetric exchange and selection rules / 5.1：

Discussion of the experimental EPR data / 5.2：

Static Magnetization

The theoretical model

Discussion of the experimental magnetization data

Dynamic Properties, Relaxation, Spin Dynamics

Relaxation mechanisms and magnetic hysteresis / 7.1：

Spin dynamics in the muon scattering experiment / 7.2：

Rabi oscillations and implementation of molecular magnets in quantum computing / 7.3：

Spin-vibronic Interaction

Hamiltonian of spin-vibronic coupling / 8.1：

Adiabatic surfaces / 8.2：

Influence of the Jahn-Teller effect on the magnetization / 8.3：

Estimation of the vibronic parameters for V₁₅ / 8.4：

Role of Structural Deformations / 9：

Zero-field splitting in a scalene triangular system / 9.1：

Discussion of inelastic neutron scattering experiments / 9.2：

Energy pattern of a scalene triangular system / 9.3：

Magnetic properties of the scalene systems / 9.4：

Field induced Jahn-Teller instability / 9.5：

NMR Experiments / 10：

Conclusions and Outlook / 11：

Neutron Spectroscopy of Molecular Nanomagnets / Tatiana Guidi

Neutron Scattering: Basics Principles

Neutron scattering cross section

Nuclear scattering

Magnetic scattering

The time-of-flight technique

Exchange Interaction: A Spectroscopic Measurement

Spin dynamics in antiferromagnetic molecular rings

Elementary excitations in antiferromagnetic rings / 3.1.1：

Probing Quantum Coherence

Tunneling of the Néel vector / 4.1：

Quantum oscillations of the total spin / 4.2：

Zero-Field Splitting Anisotropy in High Spin Clusters

The giant spin approximation and beyond

Beyond the giant spin approximation / 5.1.1：

Recent Developments in EPR Spectroscopy of Molecular Nanomagnets / Eric J. L. McInnes

Beyond the Giant Spin Approximation (GSA)

Discrete Clusters-of-Clusters

Pulsed EPR

Simulating Computationally Complex Magnetic Molecules / Larry Engelhardt ; Christian Schroder

Scope and purpose

Introduction to the Heisenberg Hamiltonian

Usefulness and limitations of matrices

Quantum Monte Carlo Simulations

Avoiding the 'roadblock' of large matrices

Energy spectrum for symmetric rings

Applications to heterometallic rings

Applications to frustrated magnetic molecules

Classical Spin Dynamics Simulations

The classical heisenberg hamiltonian

Classical Monte Carlo simulations

The spin equations of motion / 3.2.1：

Heat bath simulational methods

Revealing novel physics in magnetic molecules with classical methods

Competing spin phases and exchange disorder in the Keplerate type molecules {Mo₇₂Fe₃₀} and {Mo₇₂Cr_3o} / 3.4.1：

Metamagnetic phase transitions in magnetic polytopes / 3.4.2：

Critical slowing-down in Heisenberg magnetic molecules / 3.4.3：

Summary

Index

Preface

Convergent Self-assembly

Introduction and overview / 1.1：

Polytopic ligands for [n × n] square grids-design and self-assembly / 1.2：

Thermodynamic aspects of the formation of convergent self-assembled grid architectures / 1.3：

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