[1] Lanzhou Univ, State Key Lab Appl Organ Chem, Lanzhou 730000, Peoples R China
[2] Lanzhou Univ, Coll Chem & Chem Engn, Lanzhou 730000, Peoples R China
[3] Chinese Univ Hong Kong, Dept Chem, Hong Kong, Hong Kong, Peoples R China
[4] Chinese Univ Hong Kong, Inst Mol Funct Mat, UGC AoE Scheme, Hong Kong, Hong Kong, Peoples R China
[5] Univ Bielefeld, Dept Chem, D-33615 Bielefeld, Germany