Laser vaporization of metallic tin is used to generate Sn, molecules in effusive and supersonic expansions. Laser-induced fluorescence studies using isotopic samples of '"Sn established the correct vibrational numbering in the excited FO; and determined the Sn, molecular constants. From the convergence limit of the upper state the Sn, dissociation energy was determined to be 15 330*25 cm-', in good agreement with recent ab initio theoretical predictions.
ChemInform Abstract AlCu is identified by the time-resolved, laser-induced fluorescence technique to be a product of the laser vaporization of Cu-Al alloys. Three different electronic transitions of the molecule are analyzed, and its electronic structure and bonding are discussed.
Aluminum is an element of considerable importance in chemistry and technology. Simple aluminum containing molecules, including Al2 dimer were therefore extensively studied, both experimentally1-3 and theoretically.4-8 While some theoretical studies and a previous gas phase study suggested a ground state of 3∑g symmetry, and some matrix studies claimed a 1∑ ground state, other theoretical works predicted an X 3πu ground state.
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