1981 Volume 50 Issue 5 Pages 1637-1644
The absorption and MCD spectra of Cu2+-doped LiCl and LiBr single crystals are studied in the region 15,000∼50,000 cm−1 mainly at LNT. Two absorption bands (28,150 cm−1 (B) and 36,200 cm−1 (C)) and three absorption bands (19,000 cm−1 (B), 22,500 cm−1 (B′) and 29,500 cm−1 (C)) are observed at LNT in the quenched LiCl: Cu2+ and LiBr: Cu2+ crystals, respectively, and assigned to the charge transfer transitions in the Cu2+-hexahalide complexes formed in the Li-halide host crystals. The observed absorption and MCD spectra are explained by taking into account the mixing of two t1u molecular orbitals which consist of ligand halogen pπ and pσ orbitals.
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