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NMR of liquid crystal dendrimers
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NMR of liquid crystal dendrimers
Preface
Dendrimers
NMR of Liquid Crystals and Liquid Crystal Dendrimers
Liquid Crystals
Liquid Crystals
Mesophases of Thermotropic Liquid Crystals
Nematic Phases
Smectic Phases
Columnar Phases
Molecular Structures of Liquid-Crystalline Dendrimers
Introduction
Side-Chain Liquid-Crystalline Dendrimers
PAMAM- and PPI-Based Liquid-Crystalline Dendrimers
Silicon-Containing Liquid-Crystalline Dendrimers
Carbosilane-based dendrimers
Siloxane-based dendrimers
Carbosilazane-based dendrimers
Main-Chain Liquid-Crystalline Dendrimers
Shape-Persistent Liquid-Crystalline Dendrimers
Supramolecular Dendromesogens
Other Liquid-Crystalline Dendrimer Structures
Fundamentals of Nuclear Magnetic Resonance
Introduction
Nuclear Paramagnetism
Nuclear Spin
Nuclear Magnetization
Interaction with an External Field
Dynamics of Noninteracting Spins: Bloch's Equations
Motion of a Magnetic Moment
Bloch's Equations
Interaction with an Oscillating Magnetic Induction
Generating Bi and Reading M±
The Nuclear Spin Hamiltonian
Reduced Spin Hamiltonian in High-Field NMR Spectroscopy
Reduced Spin Hamiltonian in High-Field NMR Spectroscopy of Isotropic Liquids and Gases
Selection Rules and Transition Probabilities
Energy Spectrum of the Nuclear Spin Hamiltonian in High-Field NMR Spectroscopy
Energy spectrum of a system of n interacting spins
Dynamics of Interacting Spins
The Density Matrix
Time evolution of the density matrix: the Liouville/von Neumann equation
The density matrix in thermodynamic equilibrium
Pulsed Nuclear Magnetic Resonance
Detection of the NMR Observable
Time Evolution of the Density Matrix under RF Pulses
NMR Spectroscopy of Anisotropic Fluid Systems: Theory and Experiment
Introduction
Nuclear Spin Hamiltonian for NMR of Anisotropic Fluid Systems
Averaged Second-Rank Tensorial Quantities and Order Parameters
Determination of High-Field NMR Absorption Spectra for Selected Spin Systems
NMR Spectrum from Two Interacting Identical Spin 1/2 Particles Subjected to the Same Chemical Shift
NMR Spectrum from One Spin 1 Particle Subjected to Quadrupolar Interaction and the Chemical Shift
Quantum Mechanical Analysis of Selected NMR Pulse Sequences
Spin System Subjected to a Single n/2 RF Pulse in Resonance
Solid Echo Pulse Sequence
NMR Relaxation and Molecular Dynamics: Theory
General Concepts
Relaxation Rates
Spin-Lattice Relaxation in Aligned Systems
Relaxation Mechanisms
Isotropic Rotations
Rotations/Reorientations
Molecular Translational Self-Diffusion
Collective motions
Cross-relaxation
NMR Relaxometry and Molecular Dynamics: Experimental Techniques
Inversion Recovery
Fast Field Cycling
Experimental Setups
NMR Spectroscopy of Liquid Crystal Dendrimers: Experimental Results
NMR of LC Dendrimers and the Investigation of the Biaxial Nematic Phase
Biaxial Nematic Ordering and NMR Spectroscopy
Organosiloxane Tetrapodes
Experimental Procedures
° rotation
Continuous rotation
Experimental Results and Spectra Simulations
° rotation technique and spectra of a static distribution of nematic domains
Continuous-rotation technique and the effect of slow motions
Discussion of the Spectra Simulation Results
Comparison with Tetrapodes' Monomers and Other Main-Chain LC Dendrimers
NMR Relaxometry of Liquid Crystal Dendrimers: Experimental Results
Liquid-Crystalline Dendrimers Investigated by NMR Relaxometry
End-On Organosiloxane Tetrapodes with Strong Terminal Dipoles
Organosiloxane Tetrapodes with Laterally Attached Mesogens
Organosiloxane Octopodes with Laterally Attached Mesogens
PAMAM Liquid-Crystalline Dendrimers of Generations 1 and 3
The Influence of Dendrimers' Structure on the Molecular Dynamics
Bibliography
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