| The study of spectroscopy and structure of van der waals complexes containing water molecules plays a key role in our understanding of many physical, chemical and biochemical processes involving water, such as water solvation, acid rain and hydrolysis. This thesis has studied the rovibrational spectra of D2O-Rg (Rg=Ar, Kr) complexes by using the tunable diode laser absorpton spectroscopy. The results will further enrich our understanding of the characteristics of the intermolecular interaction between water molecule and rare gas atoms.The rovibrational spectra of Ar-D2O and Kr-D2O complexes are observed in the region of the 110â†101 D2O monomer transition of the v, band. They belong to the para spin modification of D2O and are assigned as theÎ (110)(v2=1)â†Î£(101)(v2=0) internal-rotation/vibrational band. The accurate rotational constants of the excitedÎ (110) state are derived by using the least square fit with the ground constants fixed at the values determined by previous study of microwave spectrum. The origins of the orthoÎ (110)â†Î£(101) band of Ar-D2O and Kr-D2O are, respectively,1192.77539(15) and 1193.24257(22) cm-1. Both of the origins are blue shifted to related D2O monomer 110â†101 v2 bend transition value (1190.221 cm-1) by +2.554 cm-1 and +3.022 cm-1... |
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