Abo-Riziq Ali, Crews Bridgit, Grace Louis, de Vries Mattanjah S
Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, USA.
J Am Chem Soc. 2005 Mar 2;127(8):2374-5. doi: 10.1021/ja043000y.
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.
我们报告了含有一个和两个水分子的鸟嘌呤碱基对簇的光谱研究。我们使用共振双光子电离（R2PI）记录了质量选择的GG(H₂O)和GG(H₂O)₂簇的振转光谱，并使用红外-紫外双共振光谱获得了这些簇的基态红外光谱。我们发现，单个水分子稳定了我们之前在鸟嘌呤二聚体中发现的两种结构之一。添加第二个水分子不会导致进一步的结构变化。
