SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2021
·
IF 4.098
Qinghua Hu,Tao Gong,Yu Mao,Qiang Yin,Yuyuan Wang,Hongqing Wang
In this paper, we specifically designed and synthesized an excellent colorimetric and ratiometric fluorescent sensor DPA-CI for rapid and convenient detection of the highly toxic phosgene. DPA-CI was developed by incorporated a diphenylamine (DPA) and a 2-imine-3-benzo[d]imidazole as the enhanced push–pull electronic structure into the coumarin fluorophore matrix. The sensor DPA-CI towards phosgene sensing exhibited both visible colorimetric and ratiometric fluorescent color change in solution and in gaseous conditions with TICT and AIE mechanism respectively, which can be easily distinguished by using the naked eye. Also, the sensor DPA-CI showed splendid sensing performance such as excellent selectivity, rapid response (less than 8 s in THF and 2 min in gaseous condition), and fair sensitivity (limit of detection less than 0.11 ppm in gaseous condition and 0.27 μM in solution). The design strategy based on enhanced push–pull electronic structure with AIE and TICT properties will be helpful to construct a solid optical sensor with excellent potential application prospects for portable and visual sensing of gaseous phosgene through distinct color and ratiometric fluorescence change by the naked eyes.
研究领域:
化学
·
材料科学
✓ 已验证
DOI
高影响因子
Forensic Toxicology
·
2018
·Vol. 36
·期 2
·233-242
·
IF 3.924
Katselou Maria,Papoutsis Ioannis,Nikolaou Panagiota,Misailidi Nektaria,Spiliopoulou Chara,Athanaselis Sotiris
Purpose Diphenidine is a potent synthetic dissociative anesthetic drug that has recently emerged in drug markets of Europe, Japan and America. The aim of this review is to summarize the current knowledge about this drug concerning its chemistry, synthesis, prevalence, pharmacology, toxicology and metabolism, as well as its legal status. Analytical methodologies developed for the determination of diphenidine in biological specimens and published diphenidine-related intoxications, fatal or not, are also presented. Methods All the reviewed information was gathered through a detailed search of PubMed and the World Wide Web using proper keywords. Results Diphenidine is not approved for medical or veterinary use, but it is used illicitly around the world for recreational purposes or as a substitute of other controlled dissociative drugs. It is available through the Internet in powder form for oral administration, smoking or vaporization. Since its first appearance in the drug market in 2013, seizures have been reported worldwide and its abuse has already caused intoxications and deaths in Europe and Japan, thus leading to its scheduling in the United Kingdom and Canada during the second semester of 2016. Conclusions Diphenidine is a harmful dissociative drug that recently gained serious concern for public health. International and local authorities should take all the appropriate actions and measures to avoid the expansion of this new threat.
研究领域:
药理学
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毒理学
·
公共卫生
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Juanjuan Yao,Huiying Zhang,Longfu Chen,Wei Liu,Naiyun Gao,Shiyi Liu,Xiangyu Chen,Fanghui Rao
The potential risks of sono-induced nitrosation and nitration side reactions and consequent toxic nitrogenous byproducts were first investigated via sono-degradation of diphenylamine (DPhA) in this study. The kinetic models for overall DPhA degradation and the formation of nitrosation byproduct (N-nitrosodiphenylamine, NDPhA) and nitration byproducts (2-nitro-DPhA and 4-nitro-DPhA) were well established and fitted (R 2 > 0.98). Nitrosation contributed much more than nitration (namely, 43.3 – 47.3 times) to the sono-degradation of DPhA. The contribution of sono-induced nitrosation ranged from 0.4 to 56.6% at different conditions. The maximum NDPhA formation rate and the contribution of sono-induced nitrosation were obtained at 600 and 200 kHz, respectively, as ultrasonic frequencies at 200 to 800 kHz. Both NDPhA formation rate and the contribution of sono-induced nitrosation increased with increasing power density, while decreased with increasing initial pH and DPhA concentration. PO 4 3– , HCO 3 – , NH 4 + and Fe 2+ presented negative impacts on sono-induced nitrosation in order of HCO 3 – >> Fe 2+ > PO 4 3– > NH 4 + , while Br – exhibited a promoting effect. The mechanism of NDPhA formation via sono-induced nitrosation was first proposed.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICAL SCIENCES
·
2022
·Vol. 38
·期 9
·1181-1188
·
IF 1.967
Wang Cheng-Yan,Ge Qingmei,Jiang Nan,Cong Hang,Tao Zhu,Liu Mao,Fan Ying
Metal–organic frameworks (MOFs) including cucurbit[7]uril block (Q[7]·HAuCl 4 ) were employed to develop a diphenylamine (DPA) sensor in electrochemical method, the presence of HAuCl 4 improved the conductivity of the macrocyclic compound. To further enhance of the sensitivity, Au nanoparticles were inserted between the surface of glassy carbon electrode and Q[7]·HAuCl 4 MOFs (GCE-AuNPs-Q[7]·HAuCl 4 ). Cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and differential pulse voltammetry (DPV) were applied for evaluation on the electrochemical behavior. For the electrochemical inertness of DPA, a label-free electrochemical sensor in 5 mM K 3 [Fe(CN) 6 ] solution was achieved, to produce a limit of detection as low as 4.6 µM in a linear range of 5–1000 µM with good reproducibility, high stability and acceptable anti-interference ability. Application of the proposed electrode for the quantitative determination of DPA in tap water and apple juice confirms its real value. Graphical abstract
研究领域:
分析化学
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材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POROUS MATERIALS
·
2021
·Vol. 29
·期 1
·103-110
·
IF 2.496
Yang Yeqing,Liao Yingling,Liu Naiwang,Shi Li,Meng Xuan
β Zeolite/bentonite composite was synthesized by simple kneading as catalyst for condensation reaction of aniline to diphenylamine. The experiment which was conducted at 320 °C under 2 MPa with a liquid hourly space velocity (LHSV) of 2 h −1 showed that the Hβ zeolite loading 25% clay exhibited the highest activity (9.9% aniline conversion) and selectivity. Pilot experiments (315–320 °C, 2 MPa, LHSV of 0.20–0.22 h −1 ) have also confirmed that the catalyst had good stability. The crystalline structure, acidic property and textural property of the catalysts were characterized by XRD, Py-IR, N 2 adsorption–desorption. Moreover, according to the thermodynamic analysis, the condensation of aniline to diphenylamine is an exothermic reaction, indicating that too high temperature operation is unfavorable for the reaction. The studied β zeolite/bentonite composite is of promising efficiency in condensation of aniline to diphenylamine.
研究领域:
催化化学
·
材料科学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Ningwei Sun,Kaixin Su,Ziwei Zhou,Ye Yu,Xuzhou Tian,Daming Wang,Xiaogang Zhao,Hongwei Zhou,Chunhai Chen
Electrofluorochromism has attracted great attention due to the intelligence optoelectronic and sensing applications. The intrinsically switchable fluorophores with high solid-state fluorescence are regarded as key for ideal electrofluorochromic materials. Here, we reported an AIE-active polyamide with diphenylamine and tetraphenylethylene units, showing high fluorescence quantum yield up to 69.1% for the solid polymer film and stable electrochemical cycling stability. The polyamide exhibited reversible color and emission switching even in hundreds of cycles, and the fluorescence on/off contrast ratio was determined up to 417, which is the highest value to our knowledge. Furthermore, as the response time is vital for the real-life applications, to speed up the response of electrofluorochromism, a porous polymer film was readily prepared through a facile method, notably exhibiting high fluorescence contrast, long-term stability and obviously improved response, due to the sharply increased surface area. Therefore, the AIE-functionalization combining the porous structure strategy will synergistically and dramatically improve the electrofluorochromic performance, which will also promote their practical applications in the near future.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Shasha Yu,Yishan Wang,Shengpei Wang,Jia Zhu,Shenggao Liu
A series of Schiff base diphenylamines (SDs) have been successfully prepared in a one-pot synthesis process. These novel antioxidants exhibit higher antioxidative activities than the traditional antioxidants at elevated temperatures. In order to investigate the antioxidant mechanism, the reaction between antioxidant and peroxyl radicals is carried out. The isolated N-(4-(phenylamino)phenyl)benzamide, which is confirmed by the X-ray diffraction is suggested to be the key intermediate during the antioxidation process. Combined with the DFT calculations, the antioxidant mechanism is proposed that shows that SDs can be regarded as multifunctional antioxidants due to the radical-trapping ability of diphenylamine moiety and peroxyl radical-decomposing ability of imine moiety. Moreover, for practical application, the mono SDs exhibited extraordinarily higher antioxidant activities under the operating conditions of lubricant oil.
研究领域:
化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2018
·Vol. 43
·期 2
·820-826
·
IF 3.201
Xiuying Peng,Jinfeng Zou,Zhiguang Liu,Yujing Guo
N-Nitrosodiphenylamine (NDPhA), a typically nonvolatile N-nitrosamine (NA), is widely used as an additive in daily human necessities and is considered as a possible cancer-causing substance by the US Environmental Protection Agency. Therefore, the determination of NDPhA in environment is crucial to people's health. In this study, a simple and high-performance electrochemical sensor for NDPhA detection is constructed based on poly(diallyldimethylammonium chloride)-stabilized graphene/platinum nanoparticles (PDDA–Gr/PtNPs) as an electrochemical sensing platform. The PDDA–Gr/PtNP nanocomposite is synthesized by a facile wet-chemical approach. It combines the prominent properties of graphene (large surface areas and high conductivity) with the outstanding catalytic activity of Pt nanoparticles. Because of its remarkable synergistic effect, a PDDA–Gr/PtNP-modified glassy carbon electrode (PDDA–Gr/PtNPs/GCE) shows excellent performance towards electrooxidation of NDPhA with a significantly increased peak current and negatively shifted peak potential compared to graphene-modified electrode (PDDA–Gr/GCE); it exhibits good linearity for NDPhA detection with a linear range of 1.0 × 10−7–5.0 × 10−5 mol L−1 and a detection limit of 3.3 × 10−8 mol L−1 (S/N = 3) under optimum conditions. Moreover, this cost-effective and convenient sensor also has good stability, repeatability and anti-interference ability and is promising for trace analysis of NAs in environmental pollutants.
研究领域:
环境科学
·
分析化学
✓ 已验证
DOI
高影响因子
Food Additives and Contaminants Part A-Chemistry Analysis Control Exposure & Risk Assessment
·
2021
·
IF 3.057
Shaomin Ma,Xiuyi Jin,Huan Wei,Yue Liu,Ming Guo
In this paper, novel high extraction efficiency hydrophobic eutectic solvents (DESs), n-octanoic acid as a hydrogen bond donor (HBD) and menthol as a hydrogen bond acceptor (HBA), were selected from five hydrophobic DESs to extract trace diphenylamine (DPA) in fruits apple, pear and orange under ultrasonic-assisted liquid-liquid micro-extraction (UA-LLME) technology before high-performance liquid chromatography (HPLC) analysis. Working parameters such as the DESs type, molar ratio, extractant volume, and ultrasonic time of the LLME hydrophobic DESs technology were optimised. Average recoveries between 96% and 108% were obtained on actual samples. This method gave lower detection limit (LOD) than other existing methods due to combining the high-efficiency extraction of hydrophobic DES and high sensitivity of fluorescence detector. This method was sensitive and eco-friendly, and can be used for the determination of trace components in fruits.
研究领域:
分析化学
·
食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Chemistry Frontiers
·
2021
·Vol. 5
·期 16
·6145-6151
·
IF 6.482
Rui Zhao,Hui Peng,Faqiang Wang,Jianghong Zhen,Lu Li,Guofu Ma,Ziqiang Lei
Poly(4-aminodiphenylamine) (P(4-ADPA)) is a kind of polyaniline derivative and is promising as one of the alternatives to polyaniline because its monomer has a lower oxidation standard potential for oxidation and a faster oxidation rate than that of the aniline monomer. Herein, to explore the factors affecting the structural and electrochemical properties of novel conducting P(4-ADPA) materials, a series of P(4-ADPA) has been prepared by using different organic or inorganic proton acids as dopants and a cationic surfactant as the structure-directing agent. The result shows that the shape and stability of the self-assembled surfactant lamellar micelles are strongly affected by the species and the counter-ion size of proton acids, which in turn affects the morphology, crystallinity and the electrochemical properties of P(4-ADPA). Specifically, P(4-ADPA)-L with lactic acid as the dopant under a mild polymerization environment possesses a uniform intertwined nanosheet morphology and shows superior electrochemical properties with a high specific capacitance of 388 F g−1 at 0.5 A g−1 and a superlong cycle stability. In addition, P(4-ADPA)-S and P(4-ADPA)-P with sulfuric acid and perchloric acid as dopants, respectively, exhibit high conductivity and specific capacitance, and due to the high acidity of reaction solutions, a large size of counter-ions and thereby good crystallinity.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Hui Peng,Rui Zhao,Jing Liang,Sihan Wang,Fei Wang,Jiezi Zhou,Guofu Ma,Ziqiang Lei
Two-dimensional conducting polymers nanosheet prepared by the soft-template-assisted technique in aqueous system still has rarely been reported, especially the formation of nanosheets structure by protonic acid assisted controlling the stability of the micelles method. Herein, a facile, one-step, bottom-up approach is developed to synthesize novel and uniform conductive poly(4-aminodiphenylamine) (P(4-ADPA)) nanosheets with controlled morphology via regulating the proton acid concentration during the self-assembly of surfactant lamellar micelles. The as-produced conducting P(4-ADPA) demonstrates a integral nanoframework structure with uniform and intertwined nanosheets, resulting in a satisfactory specific capacitance of 395 F g–1 at the current density of 0.5 A g–1. Furthermore, another pseudocapacitor electrode material, urchin-like W18O49, is selected as a negative electrode material to fabricate a novel P(4-ADPA)//W18O49 asymmetric supercapacitor, which extends the operating voltage window up to 1.5 V, provides an energy density of 24.4 W h kg–1 at a high power density of 1491 W kg–1, and possesses superlong-life of 92% capacitance retention after 10 000 cycles. Therefore, the present work will propose an affordable strategy to design novel conducting polymer nanosheets and open up the possibility of cheap conductive polymers to meet the demands of energy storage.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Yang Liu,Xueping Dang,Hanyue Ding,Huaixia Chen
A molecularly imprinted polymer (MIP) monolith was in situ synthesized in pipette tip with 4,4′-methylenedianiline (4,4′-MDA) as template molecule and 4-vinylpyridine as functional monomer. The 4,4′-MDA-MIP monolith was used to extract three primary aromatic amines (PAAs), including 4,4′-MAD, 4-aminobiphenyl and 3,3′-dichlorobenzidine. The 4,4′-MDA-MIP monolith have specific recognition capacity and high adsorption capacity for the three PAAs. The imprinting factor for 4,4′-MAD was up to 4.26 and the adsorption capacity for 4-aminobiphenyl was up to 117.94 mg g −1 . The extraction parameters for the pipette tip solid-phase extraction (PTSPE) were optimized. A determination method for the three PAAs was established by coupling the PTSPE with high performance liquid chromatography-diode array detector. The detection linear range (LRs) was 0.70–500 µg kg −1 (R 2 > 0.998), and the limits of detection (LODs) was 0.23–1.00 µg kg −1 (S/N = 3). The method was used for the migration detection of the PAAs from four polypropylene spoons, which showed satisfactory recovery of 87.4–110.6 %, indicating that the 4,4′-MDA-MIP monolith had good enrichment ability for PAAs in a complex matrix.
研究领域:
分析化学
·
食品安全
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）