title: Optical Stark spectroscopy of the B̃(1)A('')(000)←X̃(1)A(')(000) system of copper hydroxide.
abstract: The B̃(1)A('')(000)←X̃(1)A(')(000) band system of a cold beam of CuOH has been studied field-free and in the presence of a static electric field. The Stark tuning of the low-J levels of the X̃(1)A(')(000) state were analyzed to give a value of 3.968(32) D for the a-component of the permanent electric dipole moment, μ(a). An upper limit of 0.3 D for μ(a)(B̃(1)A('')) is established from the lack of observable Stark tuning for the low-J levels of the B̃(1)A('')(000) state. The experimental value for μ(a)(X̃(1)A(')) is compared to theoretical predictions and other Cu-containing molecules. A molecular orbital correlation diagram is used to rationalize the large change in μ(a) upon excitation. The electronegativity of OH was determined to be 2.81 from a comparison of the determined μ(a) with the experimental μ values for CuF, CuO, and CuS.
authors.affiliation: Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287-1604, USA.
authors.forename: Fang
authors.initials: F
authors.lastname: Wang
authors.forename: Timothy C
authors.initials: TC
authors.lastname: Steimle
mesh_terms: D003300:Copper; D006878:Hydroxides; D055095:Optics and Photonics; D011789:Quantum Theory; D013050:Spectrometry, Fluorescence
chemical_list: D006878:Hydroxides; C508959:copper hydroxide; D003300:Copper