Abstract
Time-resolved two-center cooperative vibronic transition involving a rare earth ion and a vibrational group of a ligand is shown to be a useful background-free infrared technique for the determination of the ligand structures surrounding trivalent rare earth ions. Several frequently encountered groups in biomolecular systems are studied using trivalent terbium ions as probes in solids and in liquids. The microstructures of the rare earth compounds determined with the two-center cooperative vibronic transition are found to be in agreement with those determined using other techniques.
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