1. Department of Chemical Engineering and School of Environmental Engineering, Pohang University of Science and Technology (POSTECH), San 31 Hyoja-dong, Pohang 790-784, Korea; Corporate R&D, LG Chemical Ltd., 104-1, Moonji-dong, Yusong-gu, Daejon, 305-380, Korea; and Chemical Development Division, LG Life Sciences, Ltd./R&D, 104-1, Moonji-dong, Yusong-gu, Daejon 305-380, Korea