title: Slow diffusion by singlet state NMR spectroscopy.
abstract: Small diffusion coefficients can be measured by using populations of singlet states that have a relaxation time constant, T(s), which can be much longer than the longitudinal relaxation time, T1. Spatial information can be encoded with pulsed field gradients in the manner of stimulated echo sequences. Singlet states can be excited via double-quantum coherences to enhance the efficiency of phase encoding and decoding.
authors.affiliation: Contribution from the Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne, BCH, 1015 Lausanne, Switzerland.
authors.forename: Simone
authors.initials: S
authors.lastname: Cavadini
authors.forename: Jens
authors.initials: J
authors.lastname: Dittmer
authors.forename: Sasa
authors.initials: S
authors.lastname: Antonijevic
authors.forename: Geoffrey
authors.initials: G
authors.lastname: Bodenhausen