1. Department of Applied Chemistry, Faculty of Science and Engineering; Saga University; Honjo-machi 1 Saga 840-8502 Japan
2. Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province; Guizhou University, Guiyang; Guizhou 550025 China
3. Department of Chemistry; The University of Hull; Cottingham Road Hull Yorkshire HU6 7RX UK