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首页> 外文期刊>RSC Advances >Experimental and computational investigation of a DNA-shielded 3D metal–organic framework for the prompt dual sensing of Ag+ and S2?
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Experimental and computational investigation of a DNA-shielded 3D metal–organic framework for the prompt dual sensing of Ag+ and S2?

机译：对DNA屏蔽的3D金属有机框架进行Ag +和S2即时双重感测的实验和计算研究？

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摘要

We herein report an efficient Ag ~(+) and S ~(2?) dual sensing scenario by a three-dimensional (3D) Cu-based metal–organic framework [Cu(Cdcbp)(bpea)] _( n ) (MOF 1 , H _(3) CdcbpBr = 3-carboxyl-(3,5-dicarboxybenzyl)-pyridinium bromide, bpea = 1,2-di(4-pyridinyl)ethane) shielded with a 5-carboxytetramethylrhodamine (TAMRA)-labeled C-rich single-stranded DNA (ss-probe DNA, P-DNA) as a fluorescent probe. The formed MOF-DNA probe, denoted as P-DNA@ 1 , is able to sequentially detect Ag ~(+) and S ~(2?) in one pot, with detection limits of 3.8 nM (for Ag ~(+) ) and 5.5 nM (for S ~(2?) ), which are much more lower than the allowable Ag ~(+) (0.5 μM) and S ~(2?) (0.6 μM) concentration in drinking water as regulated by World Health Organization (WHO). The detection method has been successfully applied to sense Ag ~(+) and S ~(2?) in domestic, lake, and mineral water with satisfactory recoveries ranging from 98.2 to 107.3%. The detection mechanism was further confirmed by molecular simulation studies.
机译：我们在此报告了一种基于三维（3D）铜基金属有机框架[Cu（Cdcbp）（bpea）] _（n）（MOF）的有效Ag〜（+）和S〜（2？）双重传感场景。 1，H _（3）CdcbpBr = 3-羧基-（3,5-二羧基苄基）-溴化吡啶鎓，bpea = 1,2-二（4-吡啶基）乙烷）用5-羧基四甲基罗丹明（TAMRA）标记的C屏蔽丰富的单链DNA（ss-probe DNA，P-DNA）作为荧光探针。形成的MOF-DNA探针，称为P-DNA @ 1，能够在一个罐中顺序检测Ag〜（+）和S〜（2？），检测限为3.8 nM（对于Ag〜（+））和5.5 nM（对于S〜（2？）），远远低于世界卫生组织规定的饮用水中允许的Ag〜（+）（0.5μM）和S〜（2？）（0.6μM）浓度组织（WHO）。该检测方法已成功应用于家庭，湖泊和矿泉水中的Ag〜（+）和S〜（2？）的检测，回收率达98.2％至107.3％。通过分子模拟研究进一步证实了该检测机理。

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