基于新型 2,5-双(4-吡啶基)噻唑并[5,4-d]噻唑的荧光配位聚合物在水溶液中对 Hg(II)的可视化传感。
Visual Hg(II) sensing in aqueous solution via a new 2,5-Bis(4-pyridyl)thiazolo[5,4-d]thiazole-based fluorescence coordination polymer.
机构信息
National Demonstration Center for Experimental Chemistry Education, Hebei Key Laboratory of Organic Functional Molecules, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang, Hebei 050024, PR China.
National Demonstration Center for Experimental Chemistry Education, Hebei Key Laboratory of Organic Functional Molecules, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang, Hebei 050024, PR China.
出版信息
Spectrochim Acta A Mol Biomol Spectrosc. 2022 Jan 15;265:120367. doi: 10.1016/j.saa.2021.120367. Epub 2021 Sep 7.
A new fluorescence coordination polymer [Zn(PyTTz)(5-OH-IPA)] (1) (PyTTz = 2,5-bis(4-pyridyl)thiazolo[5,4-d]thiazole, 5-OH-IPA = 5-hydroxyisophthalic acid dianion) was synthesized, which exhibited the characteristics of fluorescence quenching and bathochromic shift toward Hg(II) in aqueous solution at pH 7.00. Mechanism study showed that the interactions between Hg(II) ions and PyTTz ligands in 1 were responsible for the fluorescence emission change. Thanks to the specific interactions between 1 and Hg(II), excellent selectivity was achieved both in aqueous solution and in solid test paper. The detection limit of 1 for Hg(II) sensing was 125.76 nmol L and a linear rang was 1.00-10.00 μmol L. More importantly, satisfactory recovery and accuracy of 1 for Hg(II) sensing were also obtained in buffer-free real water samples.
一种新的荧光配位聚合物[Zn(PyTTz)(5-OH-IPA)]（1）（PyTTz=2,5-双（4-吡啶基）噻唑并[5,4-d]噻唑，5-OH-IPA=5-羟基异酞酸二阴离子）被合成，该聚合物在 pH 7.00 的水溶液中表现出对 Hg(II)的荧光猝灭和红移特性。机理研究表明，1 中 Hg(II)离子与 PyTTz 配体之间的相互作用是导致荧光发射变化的原因。由于 1 与 Hg(II)之间的特殊相互作用，在水溶液和固体试纸上都实现了优异的选择性。1 对 Hg(II)传感的检测限为 125.76 nmol L，线性范围为 1.00-10.00 μmol L。更重要的是，在无缓冲剂的实际水样中，1 对 Hg(II)传感也获得了令人满意的回收率和准确性。
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