Cheng, Xiaohong; Gao, Hongfei; Tan, Xiaoping; Yang, Xueyan; Prehm, Marko; Ebert, Helgard; Tschierske, Carsten Chemical Science, 2013, vol. 4, # 8 p. 3317 - 3331 doi: 10.1039/c3sc50664a