Chen, Kuo-Ting; Huang, Duen-Yi; Chiu, Cheng-Hsin; Lin, Wan-Wan; Liang, Pi-Hui; Cheng, Wei-Chieh Chemistry - A European Journal, 2015, vol. 21, # 34 p. 11984 - 11988 doi: 10.1002/chem.201501557