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 Beiing National Laboratory for Molecular Science, State Key Laboratory on Rare Earth Materials Chemistry and Applications College of Chemistry and Molecular Engineering, Peking University, ChengFu Road 202, HaiDian District, Beiing100871, P.R.Chhina Tel:+86-10-6275 6320 Fax:+8610-6275 1708 E-mail : gaosong@pku.edu.cn |