* Corresponding authors

^a College of Chemistry and Materials Science, Guangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and Applications, Jinan University, Guangzhou 510632, P. R. China
E-mail: danli@jnu.edu.cn

^b Department of Chemistry, University of North Texas, 1155 Union Circle #305070, Denton, Texas 76203, USA
E-mail: omary@unt.edu

^c Department of Chemistry, Shantou University, Guangdong 515063, P. R. China

^d Department of Chemistry, Shantou University Medical College, Shantou, Guangdong 515041, P. R. China

^e Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6475, USA