Article ID Journal Published Year Pages File Type
26467 Journal of Photochemistry and Photobiology A: Chemistry 2015 7 Pages PDF
Abstract

•Chlorophyll a is an essential pigment for oxygenic photosynthesis.•Four-wave mixing spectroscopies using 20 fs pulses were applied to chlorophyll a.•Real-time wave-packet motions of twelve vibrational modes were observed.

Vibrational dynamics of the photosynthetic pigment chlorophyll a in solution have been investigated by degenerated three-pulse four-wave mixing spectroscopies (transient grating and photon echo) using 20 fs pulses. Real-time wave-packet motions of intramolecular vibrations were clearly observed in four-wave mixing signals. Twelve vibrational modes due to chlorophyll a in the region of energy ranging from 200 to 1400 cm−1 were found in the Fourier transform power spectra of coherent oscillations. We demonstrate that a specific light–matter interaction can be enhanced by a control of the temporal separation between the first and second pulses.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slide

Related Topics
Physical Sciences and Engineering Chemical Engineering Bioengineering
Authors
, , , ,