699-12-7Relevant articles and documents
A novel CuO NPs/AgZSM-5 zeolite composite adsorbent: Synthesis, identification and its application for the removal of sulfur mustard agent simulant
Sadeghi, Meysam,Yekta, Sina,Mirzaei, Daryoush
, p. 995 - 1005 (2018)
In this investigation, the parent NaZSM-5 zeolite has been successfully fabricated by the hydrothermal route and then to enhance the catalytic performance of this zeolite, silver ions (Ag+) and copper oxide nanoparticles (CuO NPs) were loaded in its structure through the ion exchange and impregnation methods to attain the novel CuO NPs/AgZSM-5 zeolite composite adsorbent. The parent and modified samples were comprehensively analyzed and identified by using the FESEM-EDX, TEM, XRD, and FTIR techniques. This is the first time that the CuO NPs/AgZSM-5 (containing 3.4 wt% Ag and 12.6 wt% CuO) has been utilized for the removal (adsorption and degradation) of 2-chloroethyl phenyl sulfide (2-CEPS) as a toxic sulfur mustard agent simulate, and its applicability was proved according to the GC-FID, GC-MS, and FTIR results. Moreover, the consequences of several experimental factors such as contact time, initial concentration, adsorbent dose, and adsorbent type on the removal efficiency of 2-CEPS were also surveyed. The GC-FID analysis data confirmed that the maximum removal yield of 2-CEPS was 100%. Besides, the parameters of contact time (120 min), initial concentration (25 mg/L), and adsorbent dose (0.3 g) were perused and optimized for the subsequent reaction. The reaction kinetic status was also studied employing first order model. The quantities of the half-life (t1/2) and rate constant (k) were indicated as 26.25 min and 0.0264 min?1, respectively. The product obtained from the degradation and hydrolysis reaction between the 2-CEPS and CuO NPs/AgZSM-5 was 2-hydroxy ethyl phenyl sulfide (2-HEPS) which is substantially less toxic than original pesticide.
A NaX zeolite framework containing magnetic MgFe2O4/CdO nanoparticles: Synthesis, characterization and catalytic performance in the decontamination of 2-chloroethyl phenyl sulfide (2-CEPS) as a model of sulfur mustard agent
Farhadi, Saeed,Sadeghi, Meysam,Zabardasti, Abedin
supporting information, p. 21315 - 21326 (2021/12/04)
The present study highlights the successful fabrication of a zeolite NaX/MgFe2O4/CdO magnetically separable nanocomposite catalyst via an ultrasonic-assisted hydrothermal strategy for the decontamination of sulfur mustard agent simulant 2-chloroethyl phenyl sulfide (2-CEPS) for the first time. The as-fabricated nanocomposite was fully characterized using FESEM, TEM, EDAX, FTIR spectroscopy, XRD, AFM, VSM, N2-BET, and ICP-AES analyses. The decontamination process of 2-CEPS was monitored via GC-FID analysis. Furthermore, the effects of different analytical parameters such as contact time, catalyst type, catalyst amount and solvent type on the decontamination efficiency of 2-CEPS were precisely investigated. By using 50 mg of NaX/MgFe2O4/CdO catalyst in the presence of an n-heptane non-polar solvent, a decontamination efficiency of 100% was achieved after a contact time of 120 min. The decontamination process rate was verified by a first-order kinetic model. The obtained outcomes demonstrated that the apparent rate constant (kapp) and half-life time (t1/2) were 0.219 min-1 and 31.64 min, respectively. Lastly, the presence of hydrolysis and elimination products, namely 2-hydroxy ethyl phenyl sulfide (2-HEPS) and phenyl vinyl sulfide (PVS), from the effective degradation of 2-CEPS over the NaX/MgFe2O4/CdO catalyst was confirmed, and GC-MS analysis was performed to identify the degradation products of this agent simulant. This illustrates that the NaX/MgFe2O4/CdO catalyst could potentially be utilized for the removal of hazardous chemical warfare agents. This journal is
An asymmetric Salamo-based Zn complex supported on Fe3O4MNPs: a novel heterogeneous nanocatalyst for the silyl protection and deprotection of alcohols under mild conditions
Yao, Hongyan,Wang, Yongsheng,Razi, Maryam Kargar
, p. 12614 - 12625 (2021/04/14)
In this study, a magnetic asymmetric Salamo-based Zn complex (H2L = salen type di-Schiff bases)-supported on the surface of modified Fe3O4(Fe3O4@H2L-Zn) as a new catalyst was designed and characterizedvianumerous analytical techniques such as FT-IR spectroscopy, XRD, EDS, ICP-AES, SEM, TEM, TGA and VSM. An efficient and sustainable synthetic protocol has been presented for the synthesis of silyl ether substructuresviathe silyl protection of alcohols under mild conditions. The synthetic protocol involves a two-component solvent-free reaction between various hydroxyl-bearing substrates and hexamethyldisilazane (HMDS) as an inexpensive silylating agent using Fe3O4@H2L-Zn MNPs as a magnetically separable, recyclable and reusable heterogeneous catalyst. Fe3O4@H2L-Zn MNPs were also applied for the removal of silyl protecting groups from hydroxyl functions using water in CH2Cl2under green conditions. The catalyst demonstrated good to excellent catalytic yield efficiency for both the reactions compared to the commercial metal-based catalysts under green conditions for a wide range of substrates.
CoII immobilized on an aminated magnetic metal-organic framework catalyzed C-N and C-S bond forming reactions: A journey for the mild and efficient synthesis of arylamines and arylsulfides
Mohammadinezhad, Arezou,Akhlaghinia, Batool
, p. 15525 - 15538 (2019/10/19)
In this work, we report a simple and versatile method for the modification of a metal-organic framework (NH2-MIL53(Al)) in a step-wise manner. To characterize the synthesized nanostructured catalyst, a variety of spectroscopic and microscopic techniques including FT-IR, XRD, BET, TEM, FE-SEM, EDX, EDX-mapping, TGA, XPS, VSM, ICP-OES and CHN have been employed. Fe3O4@AMCA-MIL53(Al)-NH2-CoII NPs, which benefit from small nanocrystalline size (10-30 nm, according to the XRD and TEM data) in combination with the coexistence of magnetic nanoparticles, a metal-organic framework, and cobalt species, were found to be an excellent environment catalyst to promote the C-N and C-S cross coupling reactions. A wide range of functional substrates including electron-withdrawing and electron-donating aryl halides underwent the coupling reaction with aromatic/heteroaromatic/benzylic and aliphatic amines and sulfides. The results demonstrated that the yields of the target products were good to excellent and the catalyst can be recycled for at least seven recycling runs without a discernible decrease in its catalytic activity. Furthermore, the heterogeneity studies (such as hot filtration and poisoning tests) efficiently confirmed that the as-synthesized nanostructured catalyst is heterogeneous and completely stable under the reaction conditions. We hope that our study inspires more interest in designing novel catalysts based on using low-cost metal ions (such as cobalt) in the field of cross coupling reactions.
C-S cross-coupling reaction using novel and green synthesized CuO nanoparticles assisted by Euphorbia maculata extract
Alinezhad, Heshmatollah,Pakzad, Khatereh
, (2019/08/20)
In the present study, biosynthesis of CuO nanoparticles using a rapid, eco-friendly, cost-effective and efficient method has been reported employing aqueous Euphorbia maculata extract as mild, renewable and non-toxic reducing and capping agents without adding any surfactants. The biogenic and green method has some benefits compared to conventional physical and chemical methods. It is simple, cheap and environmentally friendly. The biosynthesized CuO NP displayed a color change pattern (from sky blue to black) on preparation and presented its respective broad peak at 365?nm, which was analyzed by UV–Vis spectroscopy. Using the FT-IR analysis, biomolecules in E. maculata extract which are responsible for bioreduction activity and synthesize of CuO NP, were identified. The XRD, EDX and FESEM results confirmed the successful synthesis of CuO nanoparticles of 18?nm sizes, with spherical and sponge crystal structure. The catalytic activity of biosynthesized CuO NPs was studied in C-S cross-coupling reaction. This method has the advantages of high yields, easy work-up, and simple reusability. The recovered CuO NP can be reused four times without any considerable loss of its catalytic activity.
Method for synthesizing 2-thiophenyl ethanol through continuous liquid-solid phase catalysis reaction
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Paragraph 0022-0041, (2019/02/26)
The invention discloses a method for synthesizing 2-thiophenyl ethanol through a continuous liquid-solid phase catalysis reaction and relates to the technical field of organic vulcanization. Accordingto the method, inorganic porous material loaded alkali metal salt is adopted as a catalyst; at normal pressure, when the temperature is 120 DEG C, the volume air speed of a mixed solution of ethylenecarbonate and thiophenol is 0.75-1.5 h, the thiophenol conversion rate is 99.9%, and the 2-thiophenyl ethanol selectivity is 99.9%, the catalyst is enabled to be continuously operated for 168 hours, wherein the thiophenol conversion rate and the selectivity of the 2-thiophenyl ethanol are both 99% or greater than 99%; a product is subjected to vacuum distillation, and a trace amount of unconverted thiophenol and ethylene carbonate are removed through alkali absorption to obtain a 2-thiophenyl ethanol product of which the purity is greater than 99%.
A mechanism of alkali metal carbonates catalysing the synthesis of β-hydroxyethyl sulfide with mercaptan and ethylene carbonate
Liu, Dongliang,Thomas, Tiju,Gong, Hong,Li, Fei,Li, Qiang,Song, Lijuan,Azhagan, Tamil,Jiang, Heng,Yang, Minghui
, p. 9367 - 9374 (2019/11/13)
The reaction of β-hydroxyethylation is essential to the current practice of organic chemistry. Here, we proposed a new and green route to synthesize 2-hydroxyethyl n-alkyl sulfide with n-alkyl mercaptan and ethylene carbonate (EC) in the presence of alkali carbonates as catalysts and revealed the mechanism by experiments and theoretical calculations. The reaction reported proceeds rapidly with high yields when it is performed at 120 °C and the catalytic loading is ～1 mol%. This protocol is applicable to other mercaptans to synthesize the corresponding β-hydroxyethyl sulfide. Density functional theory-based calculations show the energy profile for the reaction pathway. The rate-determining step is the ring-opening of EC. A negatively charged O atom of alkali carbonates approaches the S atom of -SH under the influence of hydrogen bonds. An activated S atom that carries more negative charge serves as a nucleophilic reagent and assists in the ring-opening of EC by reducing the Mayer bond orders of the C1-O1 bond in EC. Alkali cations also contribute to the C1-O1 bond cleavage. The energy barrier for the ring-opening of EC decreases with the decrease of electronegativity of alkali cations. Subsequent transference of a H atom leads to the formation of β-hydroxyethyl sulfide, the dissociation of CO2 and the reduction of K2CO3
Direct access to α-sulfenylated amides/esters: Via sequential oxidative sulfenylation and C-C bond cleavage of 3-oxobutyric amides/esters
Jiang, Yi,Deng, Jie-Dan,Wang, Hui-Hong,Zou, Jiao-Xia,Wang, Yong-Qiang,Chen, Jin-Hong,Zhu, Long-Qing,Zhang, Hong-Hua,Peng, Xue,Wang, Zhen
, p. 802 - 805 (2018/02/06)
An efficient, environmentally benign and unprecedented synthesis of various α-sulfenylated amides/esters has been developed under oxygen atmosphere. The reaction shows good functional group tolerance and excellent chemo/regioselectivity. All the desired products were obtained in moderate to excellent yields, even on the gram scale. Practically, the related α-thiol Weinreb amide can be readily transferred to a series of prospective compounds, and selenium atom can be introduced to the α-sites of the amides in high yields.
COMPOUND AND COMPOSITION CONTAINING THE SAME, AND METHOD FOR MANUFACTURING DEVICE USING THE COMPOSITION
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Paragraph 0089-0091, (2017/09/14)
PROBLEM TO BE SOLVED: To provide a compound which efficiently absorbs extreme ultraviolet radiation (EUV) such as KrF excimer laser and ArF excimer laser or an electron beam, has low sensitivity to OoB, and has high contrast. SOLUTION: A compound is represented by formula (1) and formula (2). In formulae (1) and (2), R1a and R1a are each independently a first monovalent organic group containing a divalent hydrocarbon group selected from an alkylene group; a group bonded directly to sulfur atom (S+) is the divalent hydrocarbon group; R2 is a hydrogen atom, an alkyl group and the like; R3 to R6 are a hydrogen atom, a hydroxy group or a second monovalent organic group; X- is a monovalent anion; and R1a and R1b in Formula (1) or R1a and R1b in Formula (2) may be bonded to each other to form a ring. SELECTED DRAWING: None COPYRIGHT: (C)2017,JPOandINPIT
NaI/silica sulfuric acid as an efficient reducing system for deoxygenation of sulfoxides in poly ethylene glycol (PEG-200)
Zarei, Morteza,Ameri, Mohammad Aghil,Jamaleddini, Azar
, p. 259 - 263 (2013/08/26)
Deoxygenation of structurally diverse sulfoxides including dialkyl, diaryl, aryl alkyl and allyl sulfoxides to the corresponding sulfides were carried out using a NaI/silica sulfuric acid reducing system at room temperature in poly ethylene glycol (PEG-200) in excellent yields.
