Residual dipolar couplings of soft solids by accordion magic sandwich

Residual dipolar coupling are important source of information about structure and molecular motions of soft solids. A new method, accordion magic sandwich is introduced, to measure these couplings in terms of residual van Vleck moments. A magic sandwich of variable duration leads to a Hahn echo whic...

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Bibliographic Details
Published in:Chemical physics letters 2003-07, Vol.375 (3), p.406-412
Main Authors: Demco, D.E., Fechete, R., Blümich, B.
Format: Article
Language:English
Subjects:
Applied sciences
Atomic and molecular physics
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Electrical, magnetic and optical properties
Exact sciences and technology
Magnetic resonances and relaxations in condensed matter, mössbauer effect
Molecular properties and interactions with photons
Nuclear magnetic resonance and relaxation
Nuclear resonance and relaxation
Organic polymers
Physicochemistry of polymers
Physics
Properties and characterization
Spin echoes
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Summary:Residual dipolar coupling are important source of information about structure and molecular motions of soft solids. A new method, accordion magic sandwich is introduced, to measure these couplings in terms of residual van Vleck moments. A magic sandwich of variable duration leads to a Hahn echo which samples the shape of the magic echo. In this way residual dipolar couplings can be determined model free without contribution of inhomogeneous spin interactions and transverse magnetization relaxation. The method was tested on adamantane and on series of samples from cross-linked natural rubber.
ISSN:0009-2614
1873-4448
DOI:10.1016/S0009-2614(03)00874-1