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Department of Material Science and Engineering, Yonsei University, Seoul 120-749, Korea Korea Institute of Geoscience and Mineral Resources, Daejeon 305-350, Korea. *E-mail: joobeomi@gmail.net Department of Science Education and Kyungnam Institute of the Gifted Education in Science, Kyungnam University, Changwon 631-701, Korea. *E-mail: kschoi@kyungnam.ac.kr Received January 3, 2013, Accepted February 13, 2013

Synthesis and Color Modulation of an Unsymmetrical Calix[4]-bis-crown Incorporating p-Nitro-azobenzene as a Chromoionophoric Mixed Receptor