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High-sensitivity Detection of Nitroaromatic Compounds (NACs) by the pillared-layer metal- organic framework synthesized via ultrasonic method
Ultrasonics Sonochemistry ( IF 8.7 ) Pub Date : 2018-11-05 , DOI: 10.1016/j.ultsonch.2018.11.002
Azar Hakimifar , Ali Morsali

Nanorods of zinc(II) based metal-organic framework (MOF) were prepared via ultrasonic method without any surfactants at room temperature and atmospheric pressure. Control of particle size and morphology was enhanced in this synthesis method. Nanorods of pillared-layer metal organic framework, [Zn2(ubl)2(bipy)]·DMF (TMU-18), where ubl (urea-based ligand) is 4,4'-carbonylbis(azanediyl)dibenzoic acid, 4,4'-Bipyridine (bipy) DMF = N,N-dimethyl formamide), was synthesized under ultrasound irradiation in different concentrations of initial precursor. The nano structure and morphology of the synthesized MOF were characterized by Field Emission Scanning Electron Microscopy (FE-SEM), powder X-ray diffraction, elemental analysis and FT-IR spectroscopy. Moreover, Fluorescence emissions of nanorods have been studied. Luminescent MOFs (LMOFs) have shown great potential as sensor for various nitro explosives by modulating the luminescence behavior in presence of nitro explosives. Urea-functionalized MOF shows high selectivity for sensing of the nitro explosive 2,4,6-trinitrophenol (TNP) even in the presence of other nitroaromatic compounds in methanol solution. Fluorescence intensity decreased with increasing contents of nitroaromatics in organic solution due to fluorescence quenching effect. The ultrasound method has some advantages such as short duration time of reaction, no need to high temperatures and pressures for synthesis nano-materials and low costs in comparison to other methods. Considering these advantages we used ultrasonic method to produce these nanorods which show high sensitivity in detecting nitroaromatics.



中文翻译:

超声 合成的柱状层金属有机骨架对硝基芳族化合物(NAC)的高灵敏检测 

在室温和大气压下,通过超声方法在没有任何表面活性剂的情况下制备了基于锌(II)的金属-有机骨架(MOF)的纳米棒。在这种合成方法中,颗粒大小和形态的控制得到了加强。柱状层金属有机骨架的纳米棒,[Zn 2(ubl)2(bipy)]·DMF(TMU-18),其中ubl(基于脲的配体)是4,4'-羰基双(氮杂二基)二苯甲酸,4,4'-联吡啶(bipy)DMF = N,N-二甲基甲酰胺)是在超声辐照下以不同浓度的初始前体合成的。通过场发射扫描电子显微镜(FE-SEM),粉末X射线衍射,元素分析和FT-IR光谱对合成的MOF的纳米结构和形貌进行表征。此外,已经研究了纳米棒的荧光发射。发光MOF(LMOF)通过在存在硝基炸药的情况下调节其发光行为,已显示出作为各种硝基炸药传感器的巨大潜力。尿素功能化的MOF对硝基炸药2,4,甚至在甲醇溶液中存在其他硝基芳族化合物的情况下,也可以使用6-三硝基苯酚(TNP)。由于荧光猝灭作用,随着有机溶液中硝基芳族化合物含量的增加,荧光强度降低。与其他方法相比,超声方法具有一些优点,例如反应的持续时间短,不需要用于合成纳米材料的高温和高压以及低成本。考虑到这些优点,我们使用超声方法生产了这些纳米棒,这些纳米棒在检测硝基芳烃方面显示出高灵敏度。与其他方法相比,不需要用于合成纳米材料的高温高压,并且成本较低。考虑到这些优点,我们使用超声方法生产了这些纳米棒,这些纳米棒在检测硝基芳烃方面显示出高灵敏度。与其他方法相比,不需要用于合成纳米材料的高温高压,并且成本较低。考虑到这些优点,我们使用超声方法生产了这些纳米棒,这些纳米棒在检测硝基芳烃方面显示出高灵敏度。

更新日期:2018-11-05
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