1,3,4-Thiadiazol derivative functionalized-Fe3O4@SiO2 nanocomposites as a fluorescent probe for detection of Hg2+ in water samples

Mir, Noshin; Jalilian, Sara; Karimi, Pouran; Nejati-Yazdinejad, Massoud; Khammarnia, Somaye

doi:10.1039/c8ra03448f

Cited by 13 publications

(5 citation statements)

References 46 publications

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“…As expected, no change in the chemical shifts of aromatic protons as well as aldehyde protons is observed, which confirms our assumption. The powder X-ray diffraction (XRD) analysis of the assemblies of derivative 2 shows sharp peaks, indicating the crystalline nature of the molecule; however, in the presence of CPF, crystallinity was moderately disrupted and therefore a semicrystalline morphology was observed , (Figure S25, Supporting Information). The transmission electron microscopy (TEM) analysis of derivative 2 in the presence of CPF confirms the transformation of assemblies from a sheetlike structure to random-shaped aggregates (Figure ).…”

Section: Resultsmentioning

confidence: 99%

“Metal-Free” Fluorescent Supramolecular Assemblies for Distinct Detection of Organophosphate/Organochlorine Pesticides

Sharma

Kumar

2020

ACS Omega

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The “metal-free”, easy-to-prepare fluorescent supramolecular assemblies based on anthracene/perylene bisamide (PBI) derivatives have been developed for the distinct detection of organophosphate (CPF) and organochlorine (DCN) pesticides in aqueous media. The supramolecular assemblies of anthracene derivative show rapid and highly selective “on–on” response toward organophosphate (CPF), which is attributed to the formation of CPF-induced formation of “closely packed” assemblies. A detection limit in the nanomolar range is observed for CPF. On the other hand, the inner filter effect is proposed as the mechanism for the “on–off” detection of DCN using supramolecular assemblies of the anthracene derivative. This is the first report on the development of fluorescent materials having the potential to differentiate between organophosphate and organochlorine pesticides. The assemblies of anthracene derivative 2 also act as “enzyme mimic” as organophosphate pesticide show a preferential affinity for assemblies of derivative 2 over acetylcholinesterase enzyme. Further, the real-time applications of supramolecular assemblies have also been explored for the detection of CPF and DCN in spiked water and in agricultural products such as grapes and apples.

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Section: Resultsmentioning

confidence: 99%

“Metal-Free” Fluorescent Supramolecular Assemblies for Distinct Detection of Organophosphate/Organochlorine Pesticides

Sharma

Kumar

2020

ACS Omega

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“…A comparative study on recent silica based materials 20–23,35–40 for sensing and/or separation of mercury has been carried out. A summary of some of the important aspects of the materials has been given in supplementary information, Table S6.…”

Section: Resultsmentioning

confidence: 99%

Mesoporous silica based recyclable probe for colorimetric detection and separation of ppb level Hg2+ from aqueous medium

Das

Singha

Pal

et al. 2019

Sci Rep

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Functional mesoporous silica probes, MCM-TFM and SBA-TFM, have been synthesized with varying pore sizes and having S-donor sites judiciously selected to bind soft metal centers. The soft S-donor centers are contributed by the thiol functional groups that are introduced into the silica matrices by functionalization with tris(4-formylphenyl)amine followed by 2-aminothiophenol. The materials rapidly and selectively detect Hg2+ colorimetrically and the change in color profile can be perceived through bare eyes. The probes can decontaminate the pollutant heavy metal from aqueous medium at ppb level and the materials are recyclable and reusable for several separation cycles.

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“…Heterocyclic aromatic polymers have attracted a great deal of attention in many Fields such as heat resistant non-metallic materials and aerospace [10]. Thiadiazole is one of heterocyclic type that used as a nanocomposite due to the structure of thiadiazole components [11], one of important method to prepare polymer / silica nanocomposite its modification by chemical interaction, in this work polymer chains covalent attachment with surface of nanosilica, by functional groups to produce new nanocomposite [12].…”

Section: Introductionmentioning

confidence: 99%

New Nanocomposite Derivatives From Thiadiazole Polymers /Silica Synthesis and Characterization using Free Radical Polymerization

Abid

Sultan²,

Tomma³

2019

IHJPAS

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A new class of thiadiazole /silica nanocomposites with chemical bonds between thiadiazole monomers and modified nanosilica surface were synthesized by free radical polymerization. Presence silica nanoparticles in the structure of nanocomposite showed effectively improve the physical and chemical properties of Producing polymers. A nanocomposite material with feature properties comparison with their polymers, The structure and morphology of the synthesis materials were investigated by FT-IR spectrum which display preparation new thiadiazole compounds and polymerization monomers. FT-IR showed disappeared double bond (C=C) of monomers, due to produce long chains of thiadiazole polymers and nanocomposite. X-ray diffraction gave idea about crystalline structure of nanoparticles and nanocomposite , X-ray showed that silica nanoparticles have high intensity at 18000 , due to nanoscale of particles which allowed for particles aggregation together. While nanocomposite show low intensity due to reacted thiadaizole polymer chains with silica nanoparticles surface. The distribution of nanoparticles had characterized by Atomic forces microscopy AFM. AFM results shown roughness in the surfaces of nanocomposites C1 and C2, comparison with silica nanoparticles which gave smooth surface. The roughness attributed to reaction between functionalized surface of silica nanoparticles and chains of thiadaizole polymers, which led to change in size particles distribution and surface of particles that refer to nanocomposite.

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1,3,4-Thiadiazol derivative functionalized-Fe₃O₄@SiO₂ nanocomposites as a fluorescent probe for detection of Hg²⁺ in water samples

Cited by 13 publications

References 46 publications

“Metal-Free” Fluorescent Supramolecular Assemblies for Distinct Detection of Organophosphate/Organochlorine Pesticides

“Metal-Free” Fluorescent Supramolecular Assemblies for Distinct Detection of Organophosphate/Organochlorine Pesticides

Mesoporous silica based recyclable probe for colorimetric detection and separation of ppb level Hg2+ from aqueous medium

New Nanocomposite Derivatives From Thiadiazole Polymers /Silica Synthesis and Characterization using Free Radical Polymerization

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