Other ; Related Article: Tianyu Han, Yuning Hong, Ni Xie, Sijie Chen, Na Zhao, Engui Zhao, Jacky W. Y. Lam, Herman H. Y. Sung, Yuping Dong, Bin Tong and Ben Zhong Tang|2013|J.Mater.Chem.C|1|7314|doi:10.1039/C3TC31562B ; Abstract ; An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.