Combining two-color infared pump-probe spectroscopy and anharmonic force field calculations we characterize the anharmonic coupling patterns between fingerprint modes and the hydrogen-bonded symmetric NH2 stretching vibration in adenine-thymine dA20-dT20 DNA oligomers. Specifically, it is shown that the anharmonic coupling between the NH2 bending and the CO stretching vibration, both absorbing around 1665 cm-1, can be used to assign the NH2 fundamental transition at 3215 cm-1 despite the broad background absorption of water.
@article{arxiv.0812.3335,
title = {Anharmonic Vibrational Dynamics of DNA Oligomers},
author = {O. Kühn and N. Došlić and G. M. Krishnan and H. Fidder and K. Heyne},
journal= {arXiv preprint arXiv:0812.3335},
year = {2015}
}
Comments
CECAM Workshop on Energy Flow Dynamics in Biomaterial Systems, Paris, October 2007