AbstractA metal-organic framework (MOF) was designed and prepared from luminescent Tb(III), adenosine diphosphate (ADP) and bipyridyl (Bipy). Its green fluorescence at 545 nm is shown to enable the fluorometric detection of cyanide ion based on the principle of π-conjugation-induced fluorescence enhancement. The fluorescence of the probe is strongly increased by cyanide due to extended π-conjugation between probe MOF and cyanide which sensitizes the fluorescence of Tb(III). This effect can be used to quantify cyanide at levels as low as 30 nM in aqueous solution. The method was applied to the determination of cyanide in saliva samples. The lack of interference by acetate and fluoride is a specific feature of this method. The method based on the principle of π-conjugation-induced fluorescence enhancement provides a new sensing way for widely used fluorescence assays. Graphical abstractA cyanide-selective Tb-ADP-Bipy MOF was designed and synthesized for the detection of cyanide based on the principle of π-conjugation-induced fluorescence enhancement.

中文翻译：

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通过由铽 (III)、联吡啶和二磷酸腺苷组成的金属有机骨架的扩展 π 共轭诱导荧光增强检测氰化物

摘要 以发光的Tb(III)、二磷酸腺苷(ADP)和联吡啶(Bipy)为原料，设计并制备了金属有机骨架(MOF)。它在 545 nm 处发出绿色荧光，可基于 π 共轭诱导荧光增强原理对氰化物离子进行荧光检测。由于探针 MOF 和氰化物之间延长的 π 共轭作用使 Tb(III) 的荧光敏感，氰化物强烈增加了探针的荧光。这种效应可用于量化水溶液中低至 30 nM 水平的氰化物。该方法适用于唾液样品中氰化物的测定。不受醋酸盐和氟化物的干扰是该方法的一个特点。基于π共轭诱导荧光增强原理的方法为广泛使用的荧光检测提供了一种新的传感方式。图形摘要基于π-共轭诱导荧光增强原理，设计并合成了一种氰化物选择性Tb-ADP-Bipy MOF，用于检测氰化物。