Five-, Four- and Three-Dentate Europium Chelates for Anion Sensing and Their Applicability to Enzymatic Dephosphorylation Reactions

Five-, Four- and Three-Dentate Europium Chelates for Anion Sensing and Their Applicability to Enzymatic Dephosphorylation Reactions
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用于阴离子传感的五齿、四齿和三齿铕螯合物及其在酶促去磷酸反应中的适用性

DOI:
10.1002/slct.201803287
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发表时间:
2018
期刊:
影响因子:
2.1
通讯作者:
M. Schäferling
M. Schäferling
中科院分区:
化学4区
文献类型:
--
作者:
Z. H. Mohamed;T. Soukka;C. Arenz;M. Schäferling

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在分析科学和化学传感器技术中,设计具有足够灵敏度和选择性的阴离子敏感探针是一项要求很高的任务。阴离子与镧系元素中心的可逆结合是开发分子阴离子传感器的一种可能方法,因为可逆性是连续传感和监测酶促反应的先决条件。一些阴离子物种通过取代猝灭发光的水分子而导致发光强度和寿命的强烈增加,尽管发光响应的选择性仍然是一个主要问题。我们合成了一系列带正电荷的吡啶基多齿铕配合物(五齿,四齿和三齿),包括敏化发色团,并研究了它们对不同多磷酸盐,焦磷酸盐,磷酸盐阴离子和碳氧阴离子的发光强度和寿命响应。结果表明,结合位点的数量和对称性对反应有显著影响。五齿状配合物用于实时监测ATP水解酶apyrase的活性。
The design of anion‐sensitive probes with sufficient sensitivity and selectivity is a demanding task in analytical sciences and chemical sensor technology. The reversible binding of anions to lanthanide centers is a possible approach for the development of molecular anion sensors, as reversibility is a prerequisite for continuous sensing and monitoring of enzymatic reactions. Some anion species lead to a strong increase of luminescence intensities and lifetimes by the replacement of luminescence quenching water molecules, though the selectivity of the luminescence response is still a major problem. We synthesized a series of positively charged pyridyl‐based multidentate europium complexes (five‐, four‐ and three dentate) including sensitizing chromophores and studied their luminescence intensity and lifetime responses to different polyphosphates, pyrophosphate, phosphate anions, and carboxyanions. The results revealed that the number and symmetry of the binding sites have a significant impact on the response. The five‐dentate complex was used for the real‐time monitoring of the activity of the ATP hydrolyzing enzyme apyrase.
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发表时间: 2018-07-25
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