Indian Journal of Chemistry Vol. ... Ya Wei Tu, Lie Jin Zhou, Xin Lv & Xiao Xia Wang* College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, PR China E-mail: wangxiaoxia@zjnu.cn Received 23 April 2012 ... INDIAN J. CHEM., SEC B, APRIL 2014 438 ...