Nuclear Magnetic Resonance of Liquid Crystals

Intended for researchers and students in physics, chemistry and materials science, this book provides the necessary background information and sufficient mathematical and physical detail to study the current research literature. The book begins with a survey of liquid crystal phases and field effects, together with an introduction to the basic physics of nuclear magnetic resonance. It then discusses orientational ordering and molecular field theories for various liquid crystal molecules and nmr studies of uniaxial and biaxial phases. Subsequent chapters consider spin relaxation processes and rotational, translational, and internal molecular dynamics of liquid crystals. The final chapter discusses two-dimensional and multiple- quantum nmr spectroscopies and their application in elucidating liquid crystal properties. This second edition, updated throughout, incorporates many new references and includes new mathematical appendices.

Contenu

1 Introduction to Liquid Crystals.- 2 Dynamics of Nuclear Spins.- 3 Orientational Order.- 4 Molecular Field Theories of Flexible Nematogens.- 5 Nuclear Spin Relaxation Theory.- 6 Director Fluctuations and Spin Relaxation.- 7 Rotational and Translational Dynamics.- 8 Internal Dynamics of Flexible Mesogens.- 9 Multiple-Quantum and Two-Dimensional NMR.- Appendix A Relations Between Cartesian and Spherical Tensor Components.- Appendix B Rotations, Euler Angles, and Wigner Rotation Matrices.- Appendix C Matrix Elements of the Rotational Diffusion.- C.1 Biaxial Probe in Uniaxial Phases.- C.2 Uniaxial Probe in Biaxial Phases.- Appendix D Liquid Crystal Abbreviations.