Multidentate Europium Chelates as Luminoionophores for Anion Recognition: Impact of Ligand Design on Sensitivity and Selectivity, and Applicability to Enzymatic Assays
作者:Michael Schäferling、Timo Ääritalo、Tero Soukka
DOI:10.1002/chem.201304942
日期:2014.4.25
processes and enzymatic reactions. We designed a series of pyridyl‐based multidentate europium complexes (seven‐, six‐, and five‐dentate) including sensitizing chromophores and studied their luminescence intensity and lifetime responses to different (poly)phosphates (adenosine triphosphate (ATP), adenosine diphosphate (ADP), adenosine monophosphate (AMP), cyclic adenosine monophosphate (cAMP), pyrophosphate
用于选择性识别阴离子的光致发光分子探针的设计是光学化学传感器发展的主要挑战。阴离子与镧系元素中心的可逆结合是实现阴离子传感器的一种有前途的选择,因为在某些情况下,通过取代淬灭水分子会导致强烈的发光增加。然而,获得对发光响应的灵敏度和选择性的控制是一个悬而未决的问题。首要地,选择性检测(多)磷酸盐种类例如核苷酸已经成为一项艰巨的任务,因为它们涉及许多生物学过程和酶促反应。我们设计了一系列基于吡啶基的多齿euro络合物(七,六,和五齿)(包括敏化发色团),并研究了它们对不同(多)磷酸盐(三磷酸腺苷,三磷酸腺苷(ADP),单磷酸腺苷(AMP),环状单磷酸腺苷(cAMP),焦磷酸酯,和磷酸根阴离子)和羧基阴离子(柠檬酸根,苹果酸根,草酰乙酸根,琥珀酸根,α-酮戊二酸根,丙酮酸根,草酸根,碳酸根)。结果表明,自由协调位点的数量对响应的敏感性和选择性具有重要影响。由于其可逆性,镧系元素探针可用于监测消