1 College of Chemistry and Materials Science, Guangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and Applications, Jinan University Guangzhou 510632 P. R. China danli@jnu.edu.cn.
2 Department of Chemistry, University of North Texas 1155 Union Circle #305070 Denton Texas 76203 USA omary@unt.edu.
3 Department of Chemistry, Shantou University Guangdong 515063 P. R. China.
4 Department of Chemistry, Shantou University Medical College Shantou Guangdong 515041 P. R. China.
5 Neutron Scattering Division, Oak Ridge National Laboratory Oak Ridge Tennessee 37831-6475 USA.