Xiong, Xiaoqing; Song, Fengling; Chen, Gengwen; Sun, Wen; Wang, Jingyun; Gao, Pan; Zhang, Yukang; Qiao, Bo; Li, Wenfang; Sun, Shiguo; Fan, Jiangli; Peng, Xiaojun Chemistry - A European Journal, 2013, vol. 19, # 21 p. 6538 - 6545 doi: 10.1002/chem.201300418