The Journal of Physical Chemistry B · 2009 · 30 citations · 42 references
Natural SciencesChemistryPhysicsMolecular PhysicsSpectroscopic AnalysisSpectroscopyInfrared SpectroscopyInorganic SpectroscopyLaser SpectroscopyOptical SpectroscopySpectroscopy Of BiomoleculesUltrafast OpticsFemtosecond SpectroscopyRotational DynamicsRotational-vibrational CouplingTime ConstantTransition Dipole MomentsUltrafast SpectroscopyVibrational CouplingVibrational-rotational Coupling
Nearly degenerate asymmetric stretches with perpendicular transition dipole moments of the deuterated guanidinium cation (DGdm(+)) in D(2)O and D-glycerol/D(2)O mixtures at 1600 cm(-1) were investigated by linear FTIR spectroscopy and polarization dependent femtosecond pump-probe spectroscopy. The vibrational coupling of the asymmetric stretches of guanidinium occurs within 0.5 ps and leads to fast decay of the anisotropy to a level of 0.1. A systematic study of the influence of the coherence transfer on pump-probe signals is given. Following this decay, the anisotropy decays with a time constant of 4.1 ps in D(2)O by rotational diffusion about an axis perpendicular to the DGdm(+) mean plane. The presence of aggregation was demonstrated for concentrations higher than 0.2 M.
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Thermophysical Properties of Fluid Systems
Eric W. Lemmon · Medical Entomology and Zoology · 1998 · 1.7K citations
Protein Folding Intermediates: Native-State Hydrogen Exchange
Yawen Bai, Tobin R. Sosnick, Leland Mayne et al. · Science · 1995 · 999 citations