... Full Text. Asian Journal of Chemistry; Vol. ... Faculty of Chemistry, College of Science, Hanoi National University, 19 Le Thanh Tong, Hanoi 10000, Vietnam *Corresponding author: Fax: +84 4 38241140; Tel: +84 4 38261853; E-mail: nguyendinhthanh@hus.edu.vn. ... Asian J. Chem. ...