Affiliation: | a Department of Bio-nanochemistry and Institute of Basic Natural Science, Wonkwang University, Iksan, Jeonbuk 570-749, Republic of Korea b Department of Chemistry, College of Natural Science, Chosun University, Dong-gu, Kwangju 501-759, Republic of Korea c Department of Chemistry, Faculty of Science, Gakushuin University, Tokyo 171-8588, Japan d Department of Radiological Science, Jeonju University, Jeonju, Jeonbuk 560-759, Republic of Korea e Department of Chemistry, Korea University, Sejong Campus, Chungnam 339-700, Republic of Korea |