Field cycling methods as a tool for dynamics investigations in solid state systems: Recent theoretical progress

Motion of Li+ in Nanoengineered LiBH4 and LiBH4:Al2O3 Comparison with the Microcrystalline Form

“…The latter should be a logarithmic dependence, following 1/T 1 / Àt c ln(w 0 t c ). In principle, and apart from field-cycling techniques, [48][49][50] it is possible to elucidate dimensionality effects by measuring diffusion-induced NMR SLR rates as a function of resonance frequency w 0 at a fixed temperature. [11] Such frequency-dependent SLR NMR measurements are relatively rare.…”

Mechanism of 1 H– 14 N cross-relaxation in immobilized proteins

“…GA reacts primarily with lysine (and N-terminal) amino groups [27], forming stable crosslinks by a mechanism that has not been firmly established [26]. The GA/lysine stoichiometry of the reaction is reported [47] to be $4 and N GA was chosen to allow essentially all amino groups in BPTI (5) and ubiquitin (8) to participate in crosslinks. The amino groups are fairly uniformly distributed over the protein surfaces.…”

“…1 nucleus with a static residual quadrupole coupling, enhanced I-spin relaxation is observed at I-spin Larmor frequencies matching an eigenfrequency of the static S-spin Hamiltonian. This resonant cross-relaxation phenomenon has been widely exploited for structural and dynamic studies of solids and liquid crystals [1][2][3][4][5][6][7][8]. When observed against the background of the field-dependent longitudinal I-spin relaxation, the resonant enhancement of the Ispin relaxation induced by the S spin is commonly referred to as a quadrupole peak (Q peak, QP) in the relaxation rate or as a quadrupole dip in the relaxation time.…”

Thermodynamic properties and molecular motions in ferroelectric (C3N2H5)5Sb2Br11

“…One of them is related to polarization transfer effects [24][25][26][27] between protons and Br nuclei. Polarization transfer can occur in systems containing nuclei of the spin quantum number 1/2 mutually coupled to nuclei possessing quadrupole moments.…”