National Changhua University of Education Institutional Repository : Item 987654321/10102
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题名: A Pyrenyl-appended Triazole-based Ribose as a Fluorescent Sensor for Hg2+ Ion
作者: Chen, Kuan-Hao;Lu, Cheng-Yi;Cheng, Hsiu-Jung;Chen, Shau-Jiun;Hu, Ching-Han;Wu, An-Tai
贡献者: 化學系
关键词: Chemosensor;Ribose;Fluorescence;Pyrene
日期: 2010-11
上传时间: 2012-05-03T06:18:18Z
出版者: Elsevier
摘要: For the efficient detection of toxic trace metal ions, two pyrenyl-appended triazole-based d-ribose fluorescent chemosensors 6 and 7 were prepared and their fluoroionophoric properties toward transition metal ions were investigated. Chemosensors 6 and 7 exhibit highly selective recognition toward Hg2+ ion among a series of tested metal ions in CH2Cl2/MeOH solution. The association constants of 6 and 7 are calculated to be 1.73 × 105 M−1 and 4.44 × 105 M−1, respectively. Both 6 and 7 formed complexes with the Hg2+ ion at a 1:1 ligand-to-metal ratio with a detection limit of 10–15 μM Hg2+. Computational analysis demonstrated that the Hg2+ ion occupied the coordination center of 6 with N2 and N3 atoms in two triazole groups, thus separating and distorting the two parallel pyrenes away from each other.
關聯: Carbohydrate Res., 345(17): 2557-2561
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