Discriminative detection of nitro aromatic explosives by a luminescent metal–organic framework

Asha, K. S.; Bhattacharyya, Kalishankar; Mandal, Sukhendu

doi:10.1039/c4tc01982b

Cited by 185 publications

(92 citation statements)

References 67 publications

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“…The quenching mechanism of 1 towards o-, m-and p-NP may be accounted for following three reasons: (1) upon excitation, electrons are typically transferred from the conduction band (CB) of MOFs to the lowest unoccupied molecular orbitals (LUMOs) 45 of analytes 11,[56][57][58] . The greater of the bandgaps between the CB of the MOF and the LUMOs of the analytes, the higher of the efficiency of the luminescence quenching.…”

Section: The Quenching Mechanismmentioning

confidence: 99%

A luminescent europium MOF containing Lewis basic pyridyl site for highly selective sensing of o-, m- and p-nitrophenol

et al. 2015

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A new Eu-MOF constructed by a multidentate ligand with a lewis basic pyridyl site shows highly luminescent selective sensing of the o-, m-and p-nitrophenol.A new luminescent two-dimensional europium metal-organic framework [Eu 6 (L) 3 (HL) 2 (H 2 O) 10 ]·10H 2 O·x(solvent) (1) has been successfully prepared by the solvothermal reaction of Eu(NO 3 ) 3 ·6H 2 O and the multidentate π -conjugated ligand H 4 L (H 4 L = (5,5'-(pyridine-2,5-diyl)isophthalic acid) which has a lewis basic pyridyl site. The solid sample of 1 emits high bright red light which can be readily observed by the naked eyes when excited at 358 nm at ambient temperature. 10 Interestingly, the luminescence of fine grinding 1 particles dispersed in ethanol can be sensitively and selectively quenched by adding trace amounts of o-, m-and p-nitrophenol (NP), which reveals that 1 can be used as a luminescence sensor for the detection of o-, m-and p-NP.

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Section: The Quenching Mechanismmentioning

confidence: 99%

A luminescent europium MOF containing Lewis basic pyridyl site for highly selective sensing of o-, m- and p-nitrophenol

et al. 2015

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“…Upon the addition of 90 μL TNP solution, the initial fluorescence intensity of 1 is quenched nearly 93.9%, which is higher than those on the addition of 90 μL other NACs solution (18.0%, 25.4%, 29.6% and 39.1% for NB, m ‐DNB, 2,4‐DNT and PNT, respectively) (Figure ). A red shift (65 nm ) of the emission band upon increasing addition of TNP solution could be a consequence of an energy transfer mechanism occurring between the analyte and the compound (Figure ) …”

Section: Resultsmentioning

confidence: 99%

Water‐Stable Luminescent Zn(II) Metal‐Organic Framework as Rare Multifunctional Sensor for Cr(VI) and TNP

Zhang

Gong

et al. 2017

ChemistrySelect

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One new Zn(II) MOFs based on 3‐abit and 2,5‐tdc, namely {[Zn(2, 5‐tdc)(3‐abit)]⋅H2O}n (1) (2,5‐tdc=2,5‐thiophenedicarboxylic acid, 3‐abit=4‐amino‐3,5‐bis(imidazol‐1‐ylmethyl)‐1,2,4‐triazole) has been synthesized and structurally characterized by single crystal and powder X‐ray diffractions, elemental analysis, FT‐IR spectroscopy and TGA. X‐ray structural analysis reveals that 1 displays a two‐dimensional (2‐D) two‐fold interpenetrated framework, constructed by 3‐abit and 2,5‐tdc single bridges. The strong luminescence and good water‐stable nature of this Zn‐MOF indicate that it can potentially be used as a luminescent sensor. In this work, 1 can display highly selective and sensitive sensing of Cr(VI) and TNP through luminescence quenching effect. Moreover, the mechanisms of 1 as a multifunctional sensor have been preliminarily studied.

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“…The most challenging aspect is the specific detection of an explosive group or several specific substances . In the field of MOFs, the presence several functional groups enhances the specific detection of explosive analytes.…”

Section: Trace Gas Enrichment and Sensingmentioning

confidence: 99%

Adsorption and Detection of Hazardous Trace Gases by Metal–Organic Frameworks

et al. 2018

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The quest for advanced designer adsorbents for air filtration and monitoring hazardous trace gases has recently been more and more driven by the need to ensure clean air in indoor, outdoor, and industrial environments. How to increase safety with regard to personal protection in the event of hazardous gas exposure is a critical question for an ever-growing population spending most of their lifetime indoors, but is also crucial for the chemical industry in order to protect future generations of employees from potential hazards. Metal-organic frameworks (MOFs) are already quite advanced and promising in terms of capacity and specific affinity to overcome limitations of current adsorbent materials for trace and toxic gas adsorption. Due to their advantageous features (e.g., high specific surface area, catalytic activity, tailorable pore sizes, structural diversity, and range of chemical and physical properties), MOFs offer a high potential as adsorbents for air filtration and monitoring of hazardous trace gases. Three advanced topics are considered here, in applying MOFs for selective adsorption: (i) toxic gas adsorption toward filtration for respiratory protection as well as indoor and cabin air, (ii) enrichment of hazardous gases using MOFs, and (iii) MOFs as sensors for toxic trace gases and explosives.

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Discriminative detection of nitro aromatic explosives by a luminescent metal–organic framework

Cited by 185 publications

References 67 publications

A luminescent europium MOF containing Lewis basic pyridyl site for highly selective sensing of o-, m- and p-nitrophenol

A luminescent europium MOF containing Lewis basic pyridyl site for highly selective sensing of o-, m- and p-nitrophenol

Water‐Stable Luminescent Zn(II) Metal‐Organic Framework as Rare Multifunctional Sensor for Cr(VI) and TNP

Adsorption and Detection of Hazardous Trace Gases by Metal–Organic Frameworks

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