Fluorescence and visual sensing of nitroaromatic explosives using electron rich discrete fluorophores

Shanmugaraju, Sankarasekaran; Joshi, Sachin A.; Mukherjee, Partha Sarathi

doi:10.1039/c1jm10406c

Cited by 231 publications

(138 citation statements)

References 73 publications

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“…Recently, we and others used pyrene excimer fluorescence for the detection of nitroaromatic molecules utilizing nanomaterials that contain chemically attached or more simply physically encapsulated pyrene molecules. 14,[24][25][26][27][28][29][30][31][32] However, most of these studies aimed to detect nitroaromatic explosives in the vapour phase or in organic solvents and studies for the determination of nitroaromatic explosive contaminated water are very rare. [26][27][28][29] In addition, for the materials with pyrene excimer emission, the detection limit in the aqueous phase is generally poor (at the µM level).…”

Section: Introductionmentioning

confidence: 99%

“…4,[5][6][7][8] Although these methods are usually sensitive, development of simple and handheld techniques such as fluorescence based systems (consisting of a simple UV lamp and a fluorescent probe) has attracted a great deal of interest due to their portability and ease of use. For instance, using quantum dots, 9-11 fluorescent dyes, [12][13][14] metal organic frameworks (MOFs), [15][16][17] and conjugated polymers, [18][19][20][21] nitroaromatic molecules were detected in the aqueous phase. However, these methods generally have some drawbacks such as high detection limit, interference from non-nitroaromatic compounds, laborious and costly synthesis and poor stability of fluorescent probes under the atmospheric conditions.…”

Section: Introductionmentioning

confidence: 99%

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Nanoconfinement of pyrene in mesostructured silica nanoparticles for trace detection of TNT in the aqueous phase

2014

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This article describes the preparation of pyrene confined mesostructured silica nanoparticles for the trace detection of trinitrotoluene (TNT) in the aqueous phase. Pyrene confined mesostructured silica nanoparticles were prepared using a facile one-pot method where pyrene molecules were first encapsulated in the hydrophobic parts of cetyltrimethylammonium micelles and then silica polymerized around these micelles. The resulting hybrid particles have sizes of around 75 nm with fairly good size distribution. Also, they are highly dispersible and colloidally stable in water. More importantly, they exhibit bright and highly stable pyrene excimer emission. We demonstrated that excimer emission of the particles exhibits a rapid, sensitive and visual quenching response against TNT. The detection limit for TNT was determined to be 12 nM. Furthermore, excimer emission of pyrene shows significantly high selectivity for TNT.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Nanoconfinement of pyrene in mesostructured silica nanoparticles for trace detection of TNT in the aqueous phase

2014

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“…Mainly anthracene based compounds are widely used for the sensing of anions and cations. Nevertheless, there are very limited compounds reported for the detection of explosives/nitroaromatics [20][21][22]. In consequence, by considering the significance of the new photoluminescent material for TNP sensing, in this work, we synthesized a new anthracene based nickel complex with fluorescent activity for the detection of TNP.…”

Section: Introductionmentioning

confidence: 99%

New Ni-Anthracene Complex for Selective and Sensitive Detection of 2,4,6-Trinitrophenol

Reddy

Kumar

Dhir

et al. 2018

International Journal of Spectroscopy

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Selective and sensitive detection of explosive materials through a simple approach is an attractive area of research having implications on public safety and homeland security. Considering this implication in mind, a new Ni-anthracene complex was designed and synthesized and has been demonstrated as an efficient fluorescence chemosensor for the selective and sensitive detection of 2,4,6-trinitrophenol. Firstly, a fluorescent anthracene ligand (A) was synthesized by treating anthracene-9-carboxaldehyde with 1,3-diaminopropane in presence of a weak acid. To achieve superior selectivity and great quenching efficiency for 2,4,6-trinitrophenol (TNP), a Ni complex, namely, [Ni( 2 -L)(NO 3 )] (B), was synthesized via the reaction of A with Ni(NO 3 ) 2 ⋅6H 2 O. Complex B showed strong emission peak ( max ) at 412 nm and exhibited high selectivity towards TNP among other nitroaromatics and anions. 100 equivalents of TNP made 95% fluorescence quenching of B and its detection limit for TNP was calculated as 2.8 M.

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“…13,14 In addition, numerous fluorescent-based chemical sensors have recently been explored. [15][16][17] Fluorescent conjugated polymers have dominated this field, producing some of the technologies used by the security industry. 18 Metal-organic frameworks (MOFs), a relatively new class of porous and crystalline materials, 19 have demonstrated promise in a number of applications including gas storage and separation, [20][21][22] catalysis, [23][24][25] and drug delivery.…”

Section: Introductionmentioning

confidence: 99%

The vapour phase detection of explosive markers and derivatives using two fluorescent metal–organic frameworks

et al. 2015

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Two fluorescent metal-organic frameworks (MOFs) [Zn(dcbpy)(DMF)]·DMF and [Dy(dcbpy)(DMF) 2 (NO 3 )] (dcbpy = 2,2'-bipyridine-4,4'-dicarboxylate) were synthesised solvothermally and structurally characterised. Uniform shape and sized microcrystals of [Zn(dcbpy)(DMF)]·DMF were also produced using microwave synthesis. The frameworks give organic linkerbased fluorescence emission and demonstrate very different detection capabilities towards the explosive taggant 2,3-dimethyl-2,3-dinitrobutane (DMNB) and trinitrotoluene (TNT) derivatives; 2,4-dinitrotoulene (2,4-DNT), nitrobenzene (NB) and paranitrotoluene (p-NT). These differences are attributed to the variation in the overall framework architecture between the two MOFs. This paper reiterates the key importance of MOF porosity in sensing applications, and highlights the value of uniform microcrystals to sensitivity.

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Fluorescence and visual sensing of nitroaromatic explosives using electron rich discrete fluorophores

Cited by 231 publications

References 73 publications

Nanoconfinement of pyrene in mesostructured silica nanoparticles for trace detection of TNT in the aqueous phase

Nanoconfinement of pyrene in mesostructured silica nanoparticles for trace detection of TNT in the aqueous phase

New Ni-Anthracene Complex for Selective and Sensitive Detection of 2,4,6-Trinitrophenol

The vapour phase detection of explosive markers and derivatives using two fluorescent metal–organic frameworks

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