Abstract
Two-dimensional infrared (2D IR) spectroscopy was used to study the vibrational modes of three quinones - benzoquinone, naphthoquinone, and anthraquinone. The vibrations of interest were in the spectral range of 1560-1710 cm-1, corresponding to the in-plane carbonyl and ring stretching vibrations. Coupling between the vibrational modes is indicated by the cross peaks in the 2D IR spectra. The diagonal and off-diagonal anharmonicities range from 4.6 to 17.4 cm-1 for the quinone series. In addition, there is significant vibrational coupling between the in-plane carbonyl and ring stretching vibrations. The diagonal anharmonicity, off-diagonal anharmonicity, and vibrational coupling constants are reported for benzoquinone, naphthoquinone, and anthraquinone. (Graph Presented).
Original language | English |
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Pages (from-to) | 8917-8925 |
Number of pages | 9 |
Journal | Journal of Physical Chemistry B |
Volume | 119 |
Issue number | 29 |
DOIs | |
State | Published - 23 Jul 2015 |