1. Departament de Química, Institut de Química Computacional i Catàlisi, Universitat de Girona. Facultat de Ciències, C/M. A. Capmany 69, 17003 Girona, Spain
2. Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials, Jiangsu Engineering Laboratory for Environment Functional Materials, Huaiyin Normal University, No. 111 West Changjiang Road, Huaian 223300, Jiangsu, P. R. China