Exploring the Vibrational Coherences in the Ultrafast Electronic Relaxation of Pyrimidine Nucleobases and Nucleosides

We studied the vibrational coherences during the ultrafast internal conversions (ICs) of pyrimidine nucleobases and -sides in aqueous solutions and the gas phase with an instrumental resolution of 14 fs. The coherence of the same ring-breathing vibrational mode with a frequency of 750 cm