Affiliation: | 1. Department of Chemistry , Liaoning University of Petroleum and Chemical Technology , Fushun, Liaoning, China genxiangluo@yahoo.com.cn;3. Department of Chemistry , Liaoning University of Petroleum and Chemical Technology , Fushun, Liaoning, China;4. Vocational and Technology College , Liaoning University of Petroleum and Chemical Technology , Fushun, Liaoling, China |