基于咔唑衍生物的荧光化学传感器的合成及其对金属离子的选择性识别性能

摘要

以咔唑为原料合成了2个荧光化学传感器，所得化合物的组成和结构经元素分析以及质谱、红外光谱、核磁共振氢谱验证．通过在25℃下进行荧光光谱滴定，研究了传感器在体积比为1∶1的二甲基亚砜/水缓冲溶液[三羟甲基氨基甲烷盐酸盐（Tris-HCl），pH ＝7．4]中对Cu2＋和 Fe3＋的选择性识别作用．结果表明，所合成的传感器与Cu2＋和 Fe3＋形成1∶1的配合物并导致荧光猝灭，并对Cu2＋离子和Fe3＋离子具有较高的选择性识别和荧光传感性能．%Two novel fluorescent chemosensors were synthesized with carbazole as the starting material .The composition and structure of as-synthesized compounds were confirmed by ele-mental analysis as well as mass spectrometry ,infrared spectrometry and nuclear magnetic reso-nance spectrometry (1 H NMR) .Furthermore ,the selective recognition ability of as-synthe-sized fluorescent chemosensors towards Cu2+ and Fe3+ ions in dimethyl sulphoxide/H2 O with a volume ratio of 1∶1 [tris(hydroxymethyl) aminomethane hydrochloride buffer ,coded as tris-HCl;pH = 7 .4] was evaluated by monitoring fluorescent titration at 25 ℃ .Results indicate that as-synthesized fluorescent chemosensors are coordinated with Cu2+ or Fe3+ to form 1∶1 type coordination compounds thereby resulting in fluorescence quenching .Besides ,they exhibit good selectivity and fluorescent sensitivity towards Cu 2+ and Fe3+ cations .