کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5415599 1393764 2009 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Gas-phase vibrational spectroscopy and ab initio calculations of Rb+(H2O)n and Rb+(H2O)nAr cluster ions
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Gas-phase vibrational spectroscopy and ab initio calculations of Rb+(H2O)n and Rb+(H2O)nAr cluster ions
چکیده انگلیسی
The competition between ion-water electrostatic interactions and water-water hydrogen bonding in cluster ions depends on several factors, including charge density of the ion and temperature of the system. Infrared photodissociation spectra of Rb+(H2O)n=2-5 and Rb+(H2O)n=1-5Ar are presented here and compared to previous experiments involving potassium and cesium. The temperature, or internal energy, of hydrated rubidium cluster ions is controlled by varying the evaporative path available for cluster formation. Warmer clusters (with effective temperatures of ∼250-500 K) are formed by the evaporation of water, while colder clusters (∼40-120 K) can be formed by argon evaporation. Colder cluster ions tend to favor conformers with more hydrogen bonds compared to those cluster ions at warmer temperatures. Previous work from this laboratory has shown significant and dramatic differences between the spectra of hydrated potassium and cesium ions. With a charge density intermediate between that of K+ and Cs+, Rb+ plays an important role in bridging the gap in our previous studies.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Spectroscopy - Volume 257, Issue 2, October 2009, Pages 157-163
نویسندگان
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