Responsive Lanthanide Coordination Polymer for Hydrogen Sulfide
Responsive Lanthanide Coordination Polymer for Hydrogen Sulfide
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DOI：
10.1021/ac402651y
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发表时间：
2013-11-19
影响因子：
7.4
通讯作者：
Chen, Yang
中科院分区：
文献类型：
--
作者：
Liu, Baoxia;Chen, Yang
金属有机配位聚合物由于其灵活的组成和结构而受到人们的广泛关注。本文利用生物分子核苷酸与发光铽离子（Tb ~（3+））的自组装和水溶液中对银离子（Ag ~+）的敏化作用，设计合成了一种对硫化氢（H_2S）具有响应性的镧系配位聚合物（LCP）。LCP是高度荧光的，由于包含Ag+离子，这敏化了Tb 3+离子的荧光。H_2S对Ag ~+离子有很强的亲和力，可使LCP的荧光猝灭。该材料对H2S具有很高的灵敏度和选择性，并用于人血清中H2S的测定。具有Tb 3+离子的LCP还具有长的荧光寿命，这允许时间分辨荧光测定，具有探测具有自发荧光的生物系统中的H2S的特别优势。
Metal organic coordination polymers have received great attention because of their flexible compositions and architecture. Here, we report the design and synthesis of a responsive lanthanide coordination polymer (LCP) for hydrogen sulfide (H2S), utilizing self-assembling of biomolecule nucleotide with luminescent terbium ion (Tb3+) and sensitizing silver ion (Ag+) in aqueous solution. LCP is highly fluorescent due to the inclusion of Ag+ ions, which sensitized the fluorescence of Tb3+ ions. H2S can strongly quench the fluorescence of LCP through its high affinity for Ag+ ions. Such configurated LCP material from initial building blocks showed high sensitivity and selectivity for H2S and was applied to the determination of H2S in human serum. LCP with Tb3+ ions also has a long fluorescence lifetime, which allows for time-resolved fluorescence assays, possessing particular advantages to probing H2S in biological systems with autofluorescence.