Selective metal detection in an unsymmetrical 1,3-alternate calix[4]biscrown chemosensor |
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| Authors: | Ju Han Bok Jeong Won Lee Jung Kyu Choi Jong Seung Kim |
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| Affiliation: | a Department of Chemistry, Dankook University, Seoul 140-714, Republic of Korea
b Laboratoire de Conception Moléculaire, UMR 7512, ECPM-ULP, Strasbourg, France |
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| Abstract: | Calix4]crown-based chemosensors 1, 2, and reference 3 have been synthesized. The weak fluorescence intensity of 1,5-naphthalene of 1 suggests that the benzene rings of the calix4]arene as well as the oxygen atoms of the crown-5 ring take part in PET. The complexation of two K+ ions by both crown-5 and 1,5-naphthalene-crown-6 loops of 1 caused fluorescence enhancement of the naphthalene unit by CHEF. Pb2+ acted as a quenching metal ion. |
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