Microhydration of Guanine base pairs.
We report spectroscopy of clusters of guanine base pairs with one and two water molecules. We recorded the vibronic spectra of the mass-selected GG(H2O) and GG(H2O)2 clusters using resonant two photon ionization (R2PI) and we used IR-UV double resonance spectroscopy to obtain ground state IR spectra of these clusters. We found that a single water molecule stabilizes one of two structures we had previously found for guanine dimers. Addition of a second water molecule causes no further structural change.
Abo-Riziq
Ali
A
Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, USA.
Crews
Bridgit
B
Grace
Louis
L
de Vries
Mattanjah S
MS
D020029:Base Pairing; D006147:Guanine / Q000737:chemistry* / Q000378:metabolism; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D014867:Water / Q000737:chemistry*
D014867:Water; D006147:Guanine