The Rovibrational Spectrum Of CO-D₂O Complex

All of the substances in nature rely on some interactions to be combined together, both of large molecules and large clusters rely on a combination of small molecules to accumulate. Carbon monoxide and water molecules are very common in nature. To study the interactions of small molecules can help us to understand the reason of interaction force and the size of binging energy, also show us a way to study other molecules.In this thesis,we study of CO-D2O,van der waals complexes in the region of D2O transition of the v2band whose band origin is1178.37896cm-1, using a tunable diode laser spectroscopy. We observe some lines which are belong to some bands of K=1â†'K=0,K=0â†'K=0,K=0â†'K=1.We get rotational parameters of the two tunneling state:symmetric tunneling state A, and antisymmetric tunneling state B. The band origin of A is1180.7978cm-1, the band origin of B is1180.7899cm-1。 Both of the band origins are blue shifted to related D2C(1178.37894cm-1) band transition by+2.41884cm-1and+2.41094cm-1. This blue-shift means that the binding energies of CO-D2O complexes decrease upon excitation of the D2O bend vibration.The tunneling frequency increases0.0076cm-1in the vibrationally excited state which is agree with blue shift of band origin.