Vibrational dynamics of ions in glass from fifth-order two-dimensional infrared spectroscopy
Eric C Fulmer1, Feng Ding, Prabuddha Mukherjee
1Department of Chemistry, University of Wisconsin - Madison, Madison Wisconsin 53706, USA.
Abstract:
The vibrational dynamics of the first four antisymmetric stretch vibrational levels of azide in an ionic glass have been measured and correlated using a heterodyned fifth-order two-dimensional infrared pulse sequence. By rephasing a two-quantum coherence, a process not possible with third-order spectroscopy, solvent effects on the frequencies and anharmonicities of the potential energy surface are measured. Fifth-order pulse sequences are another step towards precisely controlling vibrational coherence in analogy to the manipulation of spins in NMR but with ultrafast time resolution.
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