Read e-book online Nuclear Magnetic Resonance of Liquid Crystals PDF

By Ronald Y. Dong

ISBN-10: 1468402080

ISBN-13: 9781468402087

ISBN-10: 1468402102

ISBN-13: 9781468402100

Liquid crystals became ubiquitous within the screens for digital units, starting from wrist watches to computer pcs. Nuclear magnetic resonance has turn into one of many very important options for deciding upon their buildings and homes. meant for researchers and scholars in physics, chemistry and fabrics technological know-how, this publication offers the mandatory historical past details and adequate mathematical and actual element to check the present study literature. The e-book starts off with a survey of liquid crystal levels and box results and with an advent to the fundamental physics of nuclear magnetic resonance; it then discusses orientational ordering and molecular box theories for varied liquid crystal molecules and NMR reviews of uniaxial and biaxial stages. next chapters give some thought to spin leisure approaches (using a semiclassical strategy) and rotational, translational, and inner molecular dynamics of liquid crystals. the ultimate bankruptcy discusses two-dimensional and multiple-quantum NMR spectroscopies and their program in elucidating liquid crystal homes. This moment version, up-to-date all through, accommodates many new references, corrects typographical blunders, and comprises new mathematical appendices.

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51), A basis set satisfying these conditions consists of a unit matrix i, three components of spin polarization ( Ix, Iy, I z ), and five components of quadrupolar polarization defined by J x = Iylz Qz = I z2 - + IzIy, J y = IzIx I- . I/3, Kz + Ixlz , = Ix2 - Jz = Ixly + Iylx, Iy2 . The matrix representations of these operators are given in Eqs. 63) 42 2. The Dynamics of Nuclear Spins 1(10-200) 0, 3 0 01 Qz = - 001) Kz = ( 000 . 67) The operator Q z represents quadrupolar order just like the Zeeman order is given by I z , while Kz corresponds to double quantum coherence.

80, 149 (1983). 29 A. Blumstein, Liquid Crystals Order in Polymers (Academic Press, New York, 1978); Polymeric Liquid Crystals, edited by A. Blumstein (Plenum Press, New York, 1985). T. Samulski, Liquid Crystalline Order in Polymers, edited by A. Blumstein (Academic Press, New York, 1978). T. Tiddy, Phys. Rep. 57, 1 (1980). M. Seddon, Biochimica et Biophysica Acta 1031, 1 (1990). W. Reeves, Israel J. Chem. 23, 363 (1983). 34 W. Maier and G. Meier, Z. Naturforsch Teil A. 16, 470 (1961). G. de Gennes, in Proceedings of the 2nd International Liquid Crystal Conference, edited by G.

The nuclear spin Hamiltonian contains only nuclear spin operators and a few phenomenological parameters that originate from averaging the full Hamiltonian for a molecular system over the lattice coordinates. 3J. The terms that will be needed for discussion in this monograph will be summarized here. 22) This interaction is modified by the chemical shielding on the nucleus of the fields produced by the surrounding electrons. The chemical shift interaction can be incorporated into Eq. 22) to give Hz = -,Iii.

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Nuclear Magnetic Resonance of Liquid Crystals by Ronald Y. Dong

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