Coherent multidimensional spectroscopy (CMDS), an optical analogue to multidimensional NMR, has played an increasing role in broad research areas. By using both frequency and time domain nonlinear four wave mixing methods, ultrafast CMDS is able to directly observe coherence transfer, the coherent quantum mechanical analogue of population relaxation. Using a mixture of acetonitrile and magnesium perchlorate (1.0 M) as a model system, we have demonstrated that this one color, population involving coherence transfer process makes CMDS capable of measuring samples with features that mimic excitation and emission spectral measurements in fluorescence spectroscopy. With the new capabilities, one might develop CMDS into versatile vibrational tools for revealing the role of coherence and coherence transfer as a design element in probing structure-function relationships. Furthermore, coherence transfer-based vibrational resonance energy transfer methods may be developed for label-free bio-sensing and imaging, such as those demonstrated by fluorescence resonance energy transfer.

Excitation and emission spectra in the IR regime using frequency-domain time-resolved coherence transfer coherent multidimensional spectroscopy

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.