A novel molecularly imprinted polymer thin film at surface of ZnO nanorods for selective fluorescence detection of para-nitrophenol

Xiao, Wen‐Jing; Zhou, Zhiping; Hao, Tongfan; Li, Hongji; Zhu, Yanzhuo; Gao, Lin; Yan, Yongsheng

doi:10.1039/c5ra05093f

Cited by 29 publications

(14 citation statements)

References 33 publications

(60 reference statements)

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“…This result indicates the excellent selectivity of the MOG (Eu) xerogel towards 4‐NP, even in the presence of other aromatics and aliphatic nitro compounds. As illustrated in Table S4, the high K sv value of the MOG(Eu) xerogel towards 4‐NP is comparable with that of the reported famous crystalline MOF sensors …”

Section: Resultssupporting

confidence: 80%

Metathesis in Metal–Organic Gels (MOGs): A Facile Strategy to Construct Robust Fluorescent Ln‐MOG Sensors for Antibiotics and Explosives

et al. 2018

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It is essential to develop new effective sensor materials for the detection of antibiotics and organic explosives, due to their negative impacts on ecosystems and human health. In this work, guided by an in situ metal-node metathesis approach, a fluorescent metal-organic gel [MOG(Eu) gel] has been synthesized for the first time by metal-ion exchange between Eu 3+ and Al 3+ in the nonfluorescent MOG(Al) gel. More importantly, the postsynthetic MOG(Eu) xerogel shows remarkable se-Synthesis of MOG(Al) Gel Material: MOG(Al) gel was synthesized easily from a mixture of Al(NO 3 ) 3 ·9H 2 O (0.5627 g, 1.5 mmol), 1,3,5benzentricarboxylic acid (0.2101 g, 1 mmol), and ethanol (16 mL), as explained in literature. [31] The mixture was stirred to solution at room temperature before being transferred to a Teflon-lined steel autoclave, and then heated at 120°C for 6 h. The light-yellow wet gel formed upon cooling to room temperature, and was washed with ethanol three times. Synthesis of MOG(Eu) Xerogel Material:The wet MOG(Eu) gel was obtained by soaking the above-synthesized MOG(Al) gel in an ethanol solution of Eu(NO 3 ) 3 ·6H 2 O (30 mL, 3.5 mmol) for seven days. The in situ central-metal exchange led to the fresh wet MOG(Eu) gel. The wet gel was washed with ethanol to remove redundant Eu 3+ and Al 3+ ions, and then xerogel products were prepared by drying the gel in vacuo in an oven at 80°C for 12 h. The pH and Water Stability Tests:To test the stability of the MOG(Eu) xerogel, samples were soaked in aqueous solutions with different pH values (pH 1, 3, 5, 7, 9, 11, and 12) for 24 h. After soaking and drying, the samples were used to determine PXRD mpatterns. Luminescent Experiments:The suspensions of MOG(Eu) xerogel/ antibiotics and MOG(Eu) xerogel/explosives were prepared by adding pulverous xerogel (5 mg) into aqueous solutions (10 mL, 5 × 10 -4 mol L -1 ) of explosives or antibiotics at room temperature. Before the luminescence measurements, all of the mixtures were treated by ultrasonication for 30 min to form stable emulsions. In a set of experiments of selective detection, 5 mg of MOG(Eu) xerogel was added to separate solutions (5 × 10 -4 mol L -1 each) of dimetridazole, metronidazole, ornidazole, and ronidazole in the presence of other antibiotics (5 × 10 -4 mol L -1 ). Similarly, a sample (5 mg) was added to a solution (5 × 10 -4 mol L -1 ) of 4-nitrophenol in the presence of another analytes (5 × 10 -4 mol L -1 ). Before the luminescence measurements, all of the mixtures were treated by ultrasonication for 30 min to form stable emulsions.

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Section: Resultssupporting

confidence: 80%

Metathesis in Metal–Organic Gels (MOGs): A Facile Strategy to Construct Robust Fluorescent Ln‐MOG Sensors for Antibiotics and Explosives

et al. 2018

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“…Polyindole (PIn) also uniquely acted as a core to fabricate the PIn-NP@GQDs@MIPs (Zhou et al, 2015b), where the amine groups on the PIn backbone enhanced GQDs' fluorescence intensity because of surface passivation (Wang et al, 2015). In addition, nonspherical cores such as the MOFs (Liu et al, 2018), hexagonalprism UCNPs (Tang et al, 2015(Tang et al, , 2018, nanorod (Lee et al, 2013) and nanowire (Wei et al, 2015) can also support MIPs layer.…”

Section: Core-shell and Hollow Structurementioning

confidence: 99%

Strategies of molecular imprinting-based fluorescence sensors for chemical and biological analysis

Yang

Wang

et al. 2018

Biosensors and Bioelectronics

320

126

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One pressing concern today is to construct sensors that can withstand various disturbances for highly selective and sensitive detecting trace analytes in complicated samples. Molecularly imprinted polymers (MIPs) with tailor-made binding sites are preferred to be recognition elements in sensors for effective targets detection, and fluorescence measurement assists in highly sensitive detection and user-friendly control. Accordingly, molecular imprinting-based fluorescence sensors (MI-FL sensors) have attracted great research interest in many fields such as chemical and biological analysis. Herein, we comprehensively review the recent advances in MI-FL sensors construction and applications, giving insights on sensing principles and signal transduction mechanisms, focusing on general construction strategies for intrinsically fluorescent or nonfluorescent analytes and improvement strategies in sensing performance, particularly in sensitivity. Construction strategies are well overviewed, mainly including the traditional indirect methods of competitive binding against pre-bound fluorescent indicators, employment of fluorescent functional monomers and embedding of fluorescence substances, and novel rational designs of hierarchical architecture (core-shell/hollow and mesoporous structures), post-imprinting modification, and ratiometric fluorescence detection. Furthermore, MI-FL sensor based microdevices are discussed, involving micromotors, test strips and microfluidics, which are more portable for rapid point-of-care detection and in-field diagnosing. Finally, the current challenges and future perspectives of MI-FL sensors are proposed.

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“…A number of different strategies for fabrication of MIP/metal oxide hybrid nanostructures have been proposed so far [ 59 , 60 , 61 , 62 ]. In principle, these strategies can be divided into two sub-categories depending on the type of MIP/oxide adduct or hybrid produced: (a) the processes combining metal oxides and MIP in the presence or absence of a covalent crosslinker to prepare MIP/oxide bulk type nanohybrids [ 63 , 64 ]; and (b) the processes focusing on the fabrication of MIP on the surface of metal oxide nanostructures leading to the formation oxide/MIP core-shell type hybrid nanostructures [ 65 , 66 ].…”

Section: Synthesis and Fabrication Of Recognition Elementsmentioning

confidence: 99%

Imprinted Oxide and MIP/Oxide Hybrid Nanomaterials for Chemical Sensors †

Afzal

Dickert

2018

Nanomaterials

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The oxides of transition, post-transition and rare-earth metals have a long history of robust and fast responsive recognition elements for electronic, optical, and gravimetric devices. A wide range of applications successfully utilized pristine or doped metal oxides and polymer-oxide hybrids as nanostructured recognition elements for the detection of biologically relevant molecules, harmful organic substances, and drugs as well as for the investigative process control applications. An overview of the selected recognition applications of molecularly imprinted sol-gel phases, metal oxides and hybrid nanomaterials composed of molecularly imprinted polymers (MIP) and metal oxides is presented herein. The formation and fabrication processes for imprinted sol-gel layers, metal oxides, MIP-coated oxide nanoparticles and other MIP/oxide nanohybrids are discussed along with their applications in monitoring bioorganic analytes and processes. The sensor characteristics such as dynamic detection range and limit of detection are compared as the performance criterion and the miniaturization and commercialization possibilities are critically discussed.

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A novel molecularly imprinted polymer thin film at surface of ZnO nanorods for selective fluorescence detection of para-nitrophenol

Cited by 29 publications

References 33 publications

Metathesis in Metal–Organic Gels (MOGs): A Facile Strategy to Construct Robust Fluorescent Ln‐MOG Sensors for Antibiotics and Explosives

Metathesis in Metal–Organic Gels (MOGs): A Facile Strategy to Construct Robust Fluorescent Ln‐MOG Sensors for Antibiotics and Explosives

Strategies of molecular imprinting-based fluorescence sensors for chemical and biological analysis

Imprinted Oxide and MIP/Oxide Hybrid Nanomaterials for Chemical Sensors †

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