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Use of an Osmium Complex as a Universal Luminescent Probe for Enzymatic Reactions

机译:Complex配合物用作酶促反应的通用发光探针

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摘要

The water-soluble bis(bipyridine)chloro(4-picolinic acid) osmium complex, [Os-III(bpy)(2)Cl(PyCOOH)](2+) (bpy = 2,2'-bipyridine, Py = pyridine), is fluorescent in aqueous solution, whereas the reduced form of the complex, [Os-II(bpy)(2)Cl(PyCOOH)](+), shows no significant fluorescence under the same conditions. Such reversible redox control of the fluorescence of the complex can be easily adapted to follow any enzymatic reaction to yield oxidising or reducing products that are capable of interacting with [O-III(bpy)(2)Cl(PyCOOH)](2+) or [Os-II(bpy)(2)Cl(PyCOOH)](+). Based on the redox reaction between products of biocatalytic reactions and the osmium complex, we have designed a simple bioanalytical assay for the detection of nerve gases, alpha-ketoglutarate, hydrogen peroxide and glucose.
机译:水溶性双(联吡啶)氯(4-吡啶甲酸)络合物[Os-III(bpy)(2)Cl(PyCOOH)](2+)(bpy = 2,2'-联吡啶,Py =吡啶)在水溶液中呈荧光状态,而复合物的还原形式[Os-II(bpy)(2)Cl(PyCOOH)](+)在相同条件下无明显荧光。这种对复合物荧光的可逆氧化还原控制可以很容易地适应任何酶促反应,以产生能够与[O-III(bpy)(2)Cl(PyCOOH)](2+)相互作用的氧化或还原产物。或[Os-II(bpy)(2)Cl(PyCOOH)](+)。基于生物催化反应产物与the配合物之间的氧化还原反应,我们设计了一种简单的生物分析测定法,用于检测神经毒气,α-酮戊二酸,过氧化氢和葡萄糖。

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