Tracing the transient atomic motions that lie at the heart of chemical reactions requires high-resolution structural information on the timescale of molecular vibrations. Femtosecond stimulated Raman spectroscopy is now shown to provide sufficiently detailed and time-resolved vibrational spectra of the electronically excited chromophore of green fluorescent protein to reveal skeletal motions involved in the proton transfer that produces the fluorescent form of the protein.
- Chong Fang
- Renee R. Frontiera
- Richard A. Mathies
