Converting an intensity-based sensor to a ratiometric sensor: luminescence colour switching of an Ir/Eu dyad upon binding of a V-series chemical warfare agent simulant

Metherell, Alexander J.; Curty, Christophe; Zaugg, Andreas; Saad, Suad T.; Dennison, Genevieve H.; Ward, Michael D.

doi:10.1039/c6tc03754b

Cited by 19 publications

(12 citation statements)

References 33 publications

(9 reference statements)

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“…In our study the coordination of CEES molecules to Eu 3+ sites could be easily detected. This interaction leads to a drastic and rapid decrease of the emission intensity: [41–44] 16 % after 10 s, 34 % after 2 min and 71 % after 1 h of contact time for the NbEuSAP sample (Figure 7 B). The same behavior was observed for Eu‐NbSAP: 18 % after 10 s, 22 % after 2 min and 81 % after 1 h of contact with CEES (Figure 7 B and Figure S18).…”

Section: Resultsmentioning

confidence: 99%

“…On the other hand, as far as detection methods based chemosensors are concerned, [33–40] luminescent lanthanides (i.e. Eu III , Tb III , Er III ), alone or in combination with other transition metals ions, [41–43] have been recently proposed as ideal candidates for the development of novel optical sensing platforms [44] . In particular, Eu III shows unique spectroscopic characteristics, including long fluorescence lifetime, high quantum efficiency, large Stoke shift (with excitation in the ultraviolet region and emission in the UV/Vis range) and narrow and intense emission bands, which are highly sensitive to even slightly changes in the chemical surroundings [45] …”

Section: Introductionmentioning

confidence: 99%

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Bifunctional Europium(III) and Niobium(V)‐Containing Saponite Clays for the Simultaneous Optical Detection and Catalytic Oxidative Abatement of Blister Chemical Warfare Agents

Marchesi

Marchese

Evangelisti

et al. 2021

Chemistry A European J

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For the first time, the co‐presence in the saponite structure of luminescent EuIII and catalytic NbV metal sites was exploited for the simultaneous detection and catalytic abatement of sulfur‐containing blister chemical warfare agents. Metal centers were introduced in structural positions of the saponite (in the interlayer space or inside the inorganic framework) following two different synthetic methodologies. The functionalized saponites were able to reveal the presence of a sulfur mustard simulant (2‐chloroethyl)ethyl sulfide (CEES) after few seconds of contact time and more than 80 % of the substrate was catalytically decomposed after 24 h in the presence of aqueous hydrogen peroxide.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Bifunctional Europium(III) and Niobium(V)‐Containing Saponite Clays for the Simultaneous Optical Detection and Catalytic Oxidative Abatement of Blister Chemical Warfare Agents

Marchesi

Marchese

Evangelisti

et al. 2021

Chemistry A European J

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“…Recently, Ward and co‐workers reported the application of a luminescent sensor containing two different lanthanide metal ions (Ir and Eu) for a qualitative luminescent assay for the detection of OP CWAs [47] . This sensor has been previously demonstrated to be selective for VO (a simulant of V‐series), with a ratiometric change of the luminescence in the presence of VO, and a K=7.0×10 4 M −1 [48] . The test strip was prepared by dropping this sensor onto a Whatman paper, then the analytes have been dropped onto the sensor deposited and responses were detected under UV lamp after 1 minutes, 4 minutes and 1 hours.…”

Section: Sensing By Supramolecular Approachmentioning

confidence: 99%

Supramolecular Sensing of Chemical Warfare Agents

et al. 2021

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Chemical warfare agents are a class of organic molecules used as chemical weapons due to their high toxicity and lethal effects. For this reason, the fast detection of these compounds in the environment is crucial. Traditional detection methods are based on instrumental techniques, such as mass spectrometry or HPLC, however the use of molecular sensors able to change a detectable property (e. g., luminescence, color, electrical resistance) can be cheaper and faster. Today, molecular sensing of chemical warfare agents is mainly based on the “covalent approach”, in which the sensor reacts with the analyte, or on the “supramolecular approach”, which involves the formation of non‐covalent interactions between the sensor and the analyte. This Review is focused on the recent developments of supramolecular sensors of organophosphorus chemical warfare agents (from 2013). In particular, supramolecular sensors are classified by function of the sensing mechanism: i) Lewis Acids, ii) hydrogen bonds, iii) macrocyclic hosts, iv) multi‐topic sensors, v) nanosensors. It is shown how the supramolecular non‐covalent approach leads to a reversible sensing and higher selectivity towards the selected analyte respect to other interfering molecules.

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“…Several organometallic coordination chemosensors have been developed based on La 3+ , Eu 3+ , or Zn 2+ complexes or Ir 3+ /Eu 3+ bis‐complexes . Lanthanide‐complex‐based sensing materials and mechanisms to detect nerve agents and mimics can be found in a recent review which includes both solution and solid‐state detection .…”

Section: Solid‐state Fluorescence Sensing Of Nerve Agent and Simulantmentioning

confidence: 99%

Challenges in Fluorescence Detection of Chemical Warfare Agent Vapors Using Solid‐State Films

et al. 2019

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Organophosphorus (OP)‐based nerve agents are extremely toxic and potent acetylcholinesterase inhibitors and recent attacks involving nerve agents highlight the need for fast detection and intervention. Fluorescence‐based detection, where the sensing material undergoes a chemical reaction with the agent causing a measurable change in the luminescence, is one method for sensing and identifying nerve agents. Most studies use the simulants diethylchlorophosphate and di‐iso‐propylfluorophosphate to evaluate the performance of sensors due to their reduced toxicity relative to OP nerve agents. While detection of nerve agent simulants in solution is relatively widely reported, there are fewer reports on vapor detection using solid‐state sensors. Herein, progress in organic semiconductor sensing materials developed for solid‐state detection of OP‐based nerve agent vapors is reviewed. The effect of acid impurities arising from the hydrolysis of simulants and nerve agents on the efficacy and selectivity of the reported sensing materials is also discussed. Indeed, in some cases it is unclear whether it is the simulant that is detected or the acid hydrolysis products. Finally, it is highlighted that while analyte diffusion into the sensing film is critical in the design of fast, responsive sensing systems, it is an area that is currently not well studied.

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Converting an intensity-based sensor to a ratiometric sensor: luminescence colour switching of an Ir/Eu dyad upon binding of a V-series chemical warfare agent simulant

Abstract: This is a repository copy of Converting an intensity-based sensor to a ratiometric sensor: luminescence colour switching of an Ir/Eu dyad upon binding of a V-series chemical warfare agent simulant.

Cited by 19 publications

References 33 publications

Bifunctional Europium(III) and Niobium(V)‐Containing Saponite Clays for the Simultaneous Optical Detection and Catalytic Oxidative Abatement of Blister Chemical Warfare Agents

Bifunctional Europium(III) and Niobium(V)‐Containing Saponite Clays for the Simultaneous Optical Detection and Catalytic Oxidative Abatement of Blister Chemical Warfare Agents

Supramolecular Sensing of Chemical Warfare Agents

Challenges in Fluorescence Detection of Chemical Warfare Agent Vapors Using Solid‐State Films

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