From children’s toy to versatile sensor: One-step doping of Play-Doh with primary amino group for explosive detection both on surfaces and in solution

Yang, Shiwei; Fan, Wanli; Cheng, Huan; Gong, Zhengjun; Wang, Dongmei; Fan, Meikun; Huang, Bing

doi:10.1016/j.aca.2020.07.004

Cited by 5 publications

(5 citation statements)

References 59 publications

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“…This probably implies that PU in the fixate gel pad is responsible for the color reaction. It is well known that TNT could react with the amine group to form the orange-colored product, the Meisenheimer complex. ,,, Because HNS is structurally close to TNT, we suspect that a similar Meisenheimer product was formed between HNS and fixate. As shown in Figure C, when there was no fixate, the symmetric stretching vibration of the nitro groups in the HNS produced two distinct bands at 1306 and 1341 cm –1 .…”

Section: Resultsmentioning

confidence: 99%

“…It is well known that TNT could react with the amine group to form the orange-colored product, the Meisenheimer complex. 26,27,32,33 Because HNS is structurally close to TNT, we suspect that a similar Meisenheimer product was formed between HNS and fixate.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…As a result, they have received worldwide attention . Various analytical methods have been reported covering the detection of these chemicals in solution, on surfaces, , and even buried underground . As one of the most important explosives in the nitroaromatic explosives family, 2,2′,4,4′,6,6′-hexanitrostilbene (HNS) has better explosion performance than TNT − and is widely used as a secondary explosive in thermally stable charges and in-line explosive trains .…”

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confidence: 99%

“…The high viscoelasticity of fixate may also imply good adhesion capacity to remove residual contaminants from a surface, as in the case of tape . On top of this, the inherent amine groups could react with HNS to form the famous Meisenheimer complex − thanks for the similar chemical structure of HNS to TNT.…”

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confidence: 99%

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Multifunctional Flexible SERS Sensor on a Fixate Gel Pad: Capturing, Derivation, and Selective Picogram Indirect Detection of Explosive 2,2′,4,4′,6,6′-Hexanitrostilbene

et al. 2020

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2,2′,4,4′,6,6′-Hexanitrostilbene (HNS) is an explosive with better explosion performance than the well-known 2,4,6trinitrotoluene (TNT). Surprisingly, unlike other nitroaromatic explosives, there are limited reports regarding the detection of the HNS, let alone sensing reports on surface residues. In this work, a multifunctional flexible SERS sensor was proposed for the indirect detection of HNS based on the transparent fixate gel pads. The sticky and flexible gel pad can effectively collect any HNS surface residues. The inherent amine groups within the gel pad of which the main ingredient is polyurethane can react with HNS to form the orange Meisenheimer-alike complex. The modification of Ag NPs with halide ions was screened for the best SERS performance. KImodified-citrate-reduced Ag NPs showed selective but enormous SERS enhancement for the HNS derivative. The detection of HNS in the solution phase was explored, and a linear range of 0.01−25 ppm was achieved. The lowest detectable amount (LDA) of HNS was found to be 50 pg, making it one of the most sensitive methods in literature. It was successfully utilized for the HNS residues sensing on fingerprints and bags with LDAs of 5 and 200 ng, respectively. In addition, other explosives including TATB, LLM-105, RDX, HMX, FOX-7, and TNT were also examined to assess the selectivity of the fixate. It was found that the fixate showed excellent selectivity for HNS.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

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Multifunctional Flexible SERS Sensor on a Fixate Gel Pad: Capturing, Derivation, and Selective Picogram Indirect Detection of Explosive 2,2′,4,4′,6,6′-Hexanitrostilbene

et al. 2020

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“…Generally speaking, there should be an overlap between the UV-vis spectrum of the response substance and the FL spectrum of the FL substance. 15,16 Herein, a uorescent whitening agent (FWA), potassium dichromate (PD), and sulfuric acid (SA) were proposed as an "off-on" FL probe (FPD) for FA sensing in children's toys and water (Fig. 1).…”

Section: Introductionmentioning

confidence: 99%

An internal filtration effect-based “off–on” probe for fluorescent and visual sensing of formaldehyde

Fan,

Yang,

Kou

et al. 2024

Anal. Methods

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Fluorescent and visual sensing of sodium dodecylbenzene sulfonate with an aminosilane self-condensation promoting and electrostatic attraction effect-based ratiometric probe

Yang,

Fan,

Wang

et al. 2023

Analytica Chimica Acta

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From children’s toy to versatile sensor: One-step doping of Play-Doh with primary amino group for explosive detection both on surfaces and in solution

Cited by 5 publications

References 59 publications

Multifunctional Flexible SERS Sensor on a Fixate Gel Pad: Capturing, Derivation, and Selective Picogram Indirect Detection of Explosive 2,2′,4,4′,6,6′-Hexanitrostilbene

Multifunctional Flexible SERS Sensor on a Fixate Gel Pad: Capturing, Derivation, and Selective Picogram Indirect Detection of Explosive 2,2′,4,4′,6,6′-Hexanitrostilbene

An internal filtration effect-based “off–on” probe for fluorescent and visual sensing of formaldehyde

Fluorescent and visual sensing of sodium dodecylbenzene sulfonate with an aminosilane self-condensation promoting and electrostatic attraction effect-based ratiometric probe

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