Inorganic Chemistry Frontiers
·
2021
·Vol. 9
·期 9
·1879-1889
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IF 6.569
Xiao-Kai Gong,Xiao-Song Zhang,Lan Li,Jian-Ping Xu,Ru-Kun Ding,Hao Yin,Zhao-Wei Zhang,Qian Li,Long Liu
With the addition of Na+ and Bi3+ to the lead-free double perovskite Cs2AgInCl6, high photoluminescence quantum yields (PLQYs) can be achieved, making Cs2AgInCl6 more promising; however, it is still difficult to achieve blue-light-excited narrowing emission. In this study, Cs2−xKxAg0.6Na0.4In0.8Bi0.2Cl6−xBrx was developed with K+ and Br−, realizing blue-light-excited narrowing red photoluminescence under cryogenic temperatures. The transitional non-localized donor energy level was formed by KBr addition, changing the exciton excitation and transition process. With the increase in the x value, Cs2−xKxAg0.6Na0.4In0.8Bi0.2Cl6−xBrx can be excited by blue light at 150 K and emit a narrowing red light. When 1 : 1 KBr was added, the full width at half maximum (FWHM) of Cs2−xKxAg0.6Na0.4In0.8Bi0.2Cl6−xBrx red light emission was further narrowed to only 73 nm, when excited by 467 nm blue light at 10 K. This study will stimulate further research on lead-free double perovskites in the field of display technologies.
研究领域:
材料科学
·
光学
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产品关联
DOI
高影响因子
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
·
2017
·Vol. 643
·期 16
·1082-1087
·
IF 1.144
Chen Shen,Dajiang Mei,Chuanling Sun,Yunsheng Liu,Yuandong Wu
The selenites, Na 2 Be 3 (SeO 3 ) 4 · H 2 O and Cs 2 [Mg(H 2 O) 6 ] 3 (SeO 3 ) 4 , were synthesized under hydrothermal conditions. The crystal structures of Na 2 Be 3 (SeO 3 ) 4 · H 2 O and Cs 2 [Mg(H 2 O) 6 ] 3 (SeO 3 ) 4 were determined by single-crystal X-ray diffractions. Na 2 Be 3 (SeO 3 ) 4 · H 2 O crystallizes in the triclinic space group P 1 (no. 2) with unit cell parameters a = 4.8493(9), b = 12.013(2), c = 12.077(2) Å, and Z = 2, whereas Cs 2 [Mg(H 2 O) 6 ] 3 (SeO 3 ) 4 crystallizes in the monoclinic space group C 2/ m (no. 12) with lattice cell parameters a = 12.596(6), b = 7.297(4), c = 16.914(8) Å, and Z = 2. Na 2 Be 3 (SeO 3 ) 4 · H 2 O features a three-dimensional open framework structure formed by BeO 4 tetrahedra and SeO 3 trigonal pyramids. Na cations and H 2 O molecules are located in different tunnels. Cs 2 [Mg(H 2 O) 6 ] 3 (SeO 3 ) 4 has a structure composed of isolated [Mg(H 2 O) 6 ] octahedra and SeO 3 trigonal pyramids interacted by hydrogen bonds, and Cs cations are resided in-between. Both compounds were characterized by thermogravimetric analysis and FT-IR spectroscopy.
研究领域:
无机化学
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材料科学
✓ 已验证
DOI
高影响因子
MACROMOLECULES
·
2019
·
IF 5.997
Cheng-Jian Zhang,Xing-Hong Zhang
Utilization of carbon disulfide (CS2), a low-cost and sulfur-rich one-carbon (C1) feedstock, for making sulfur-containing polymers is important for both polymer chemistry and applied environmental science. However, the production of well-defined sulfur-containing polymers from CS2 and epoxides remains a key challenge. Here, we report a robust coupling reaction of CS2 and epoxides for chemoselectively producing poly(thioether)s and carbonyl sulfide (COS) in one pot. The resultant polymer has exclusive thioether units and a thiol (−SH) terminal. This route takes advantage of oxygen/sulfur exchanges through two consecutive reactions, i.e., cycloaddition of CS2 to epoxides and dethiocarboxylative ring-opening polymerization of the generated cyclic dithiocarbonates. The process can be conducted in ambient air with several commercially available organic bases as catalysts (initiators) and extended to a variety of epoxides, yielding COS and diverse poly(thioether)s with tens of grams. This work furnishes an original and practical strategy for utilizing CS2 as a sulfur feedstock in polymer synthesis.
研究领域:
高分子化学
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环境科学
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产品关联
DOI
高影响因子
Frontiers of Chemical Science and Engineering
·
2022
·Vol. 16
·期 10
·1505-1513
·
IF 4.803
Abuduwayiti Reyila,Ma Feng-Yun,Fan Xing
Four supported catalysts, nickel and ruthenium on a HZSM-5 support, were prepared by equal volume impregnation and in-situ decomposition of carbonyl nickel. The properties of catalysts were investigated by catalytic hydro-conversion of 2,2′-dinaphthyl ether as the model compound and extraction residue of Naomaohu lignite as the sample under an initial H 2 pressure of 5 MPa and temperature at 150 °C. According to the catalytic hydro-conversion results of the model compound, Ni—Ru/HZSM-5 exhibited the best catalytic performance. It not only activated H 2 into H⋯H, but also further heterolytically split H⋯H into immobile H − attached on the acidic centers of Ni—Ru/HZSM-5 and relatively mobile H + . Catalytic hydro-conversion of the extraction residue from Naomaohu lignite was further examined over the optimized catalyst, Ni—Ru/HZSM-5. Detailed molecular compositions of products from the extraction residue with and without hydrogenation were characterized by Fourier transform infrared spectroscopy and gas chromatography/mass spectrometry. The analytical results showed that the oxygen-containing functional groups in products of hydrogenated extraction residue were obviously reduced after the catalytic treatment. The relative content of oxygenates in the product with catalytic treatment was 18.57% lower than that in the product without catalytic treatment.
研究领域:
化学工程
·
材料科学
✓ 已验证
DOI
高影响因子
FUEL
·
2022
·
IF 8.035
Rui Cao,Xueqian Wang,Ping Ning,Yibing Xie,Langlang Wang,Yixing Ma,Xiang Li,Hui Zhang,Jingye Liu
Basic sites are important to promote carbonyl sulfide (COS) and carbon disulfide (CS 2 ) hydrolysis activity while improving the oxidation resistance of hydrolysis catalysts is a challenge. Here, we report an N -doped alumina-based catalyst ( N -K@Al), where the complete hydrolysis removal of COS and CS 2 by the N -doped catalyst was extended up to 15 h at 160 °C, and the turnover frequency (TOF) value of the catalyst was increased from 0.85 × 10 -2 s −1 to 1.16 × 10 -2 s −1 . The results showed that the strong interaction between nitrogen and potassium decreased the reactive oxygen density and activated –OH, weakening the oxygen mobility. In addition, the beneficial effects of N -doped included the addition of moderately and weakly basic sites by pyridine N. The optimized N -K@Al showed good catalytic performance in the hydrolysis of COS and CS 2 removal with lower reaction temperature and higher total hydrogen sulfide yield. Density functional theory calculations revealed that N -K@Al reduced the Gibbs free energy of COS and CS 2 hydrolysis to 0.21 eV and 0.33 eV, respectively, contributing to the enhanced catalytic activity. The present study presents new strategies for developing efficient antioxidant organosulfur hydrolyzers and other practical industries.
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Xiaoli Cao,Jianyu Xuan,Lin Zhang,Qun Cui,Haiyan Wang
Limited studies on the treatment technology for the simultaneous and efficient removal of COS and CS 2 are reported. An innovative approach was adopted to combine basic sites (Lewis acid sites) with transition metal oxides to create a bi-functional AlCeZr composite adsorbent with both hydrolysis and oxidation activities, which could be used for the simultaneous and efficient removal of COS and CS₂. The simultaneous removal performance of COS and CS₂ was investigated by regulating the molar ratio of pseudo-boehmite to cerium-zirconium solid solution. The AlCeZr adsorbent before and after adsorption were characterized by DRIFTS, FT-IR, TG-DTG, BET, and XPS, and the mechanism of simultaneous adsorption, hydrolysis, and oxidation of COS and CS₂ were explored. Moreover, the low-temperature regeneration performance of the AlCeZr adsorbent was evaluated. The results show that the breakthrough sulfur capacity of Al 5 Ce 0.7 Zr 0.3 (the molar ratio of Al/CeZr of 5:1) reaches 31.85 mg S/g ads under the conditions of an adsorption temperature of 90 °C, a space velocity of 2000 h⁻¹ with water vapor content of 2 vol.% and oxygen content of 0.5 vol.%. An appropriate amount of water vapor allows water molecules to repair Al-OH sites through hydrogen bonding, while oxygen maintains the concentration of Al-O* active sites via a lattice oxygen vacancy compensation mechanism (Ce³⁺/Ce⁴⁺ redox cycle). The lattice oxygen (O²⁻) in the Ce-Zr solid solution forms an electron transfer channel with Al-OH, promoting the directional conversion of H₂S intermediates to generate Ce₂(SO₄)₃. The Al 5 Ce 0.7 Zr 0.3 achieves a regeneration efficiency of over 98% at 150 °C (approximately 50-350 °C lower than that of industrial regeneration temperature reported in the literature), and shows efficient low-temperature desulfurization and regeneration capability, which has a promising application prospect.
✓ 已验证
产品关联
DOI
高影响因子
BIOCATALYSIS AND BIOTRANSFORMATION
·
2021
·
IF 2.181
Hongqian Dai,Yuan Lu,Hanbing Shi,Lan Tang,Xingyuan Sun,Zhimin Ou
Fe3O4 magnetic nanoparticles were prepared by chemical co-precipitation and modified with 3-aminopropyltriethoxysilane (APTES) and CS2 to form Fe3O4-APTES-CS2 magnetic carriers. Magnetically immobilized enzymes are attractive owing to their potential applications in many biological fields. When an alternating magnetic field is applied, the magnetic nanoparticles experience a force in the direction of the field, and the magnetic moments of the magnetic nanoparticles are apt to align in the direction of the field. Thus, magnetic nanoparticles behave like microscopic stirrers. The optimal reaction conditions of the acylation reaction using Fe3O4-APTES-CS2-lipase were 200 mmol/L 1-methyl-3-amphetamine, 100 mg immobilized lipase, 200 μL ethyl acetate, 12.6 × g rotating speed, 40 °C, and 5 days in the shaker. The conversion and enantiomeric excess of R-2a reached a maximum of 36.8% and 98.5%, respectively. 1-Methyl-3-phenylpropylamine was resolved using Fe3O4-APTES-CS2-lipase in an alternating magnetic field. The optimal magnetic field frequency and magnetic field intensity were determined to be 500 Hz and 12 Gs, respectively. The conversion and enantiomeric excess of R-2a reached a maximum of 40.3% and 98.5%, respectively. The results revealed that conversion under a magnetic field was significantly higher than that without a magnetic field. Highly optically active (R)-N-acetyl-1-methyl-3-amphetamine can be obtained via an efficient resolution of racemic 1-methyl-3-phenylpropylamine with immobilized lipase magnetic nanoparticles as a catalyst and ethyl acetate as an acyl donor in organic solvents in an alternating magnetic field.
✓ 已验证
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2022
·
IF 5.546
Yejun Luo,Zheng Li,Yufang Chen,Tao Jin
Hydrophobic modification of cellulose via activation synergistic activators regenerated by electron transfer (ARGET) atom transfer radical polymerization (ATRP) method has been proved to effectively improve the long-term hydrophobic stability of cotton filter fabric. However, the extra activation process will inevitably increase the complexity of the reaction process. In this work, carbon disulfide (CS 2 ) was incorporated into the ARGET-ATRP reaction system to avoid adding redundant reaction links. Specifically, the activation and acyl bromination processes were combined, and then the graft modification reaction between the acyl bromide cotton filter fabric and 1-octadecene (1-Oct) was realized by the ARGET-ATRP. The effect of the combined process on the hydrophobic modification reaction and performance of cotton filter fabric was investigated. The results showed that, under the optimum dosages of activator CS 2 , acyl bromide reagent BiB and monomer 1-Oct, the activator CS 2 was directly incorporated into the acyl bromination process. And after ARGET-ATRP Hydrophobic modification, the initial water contact angle (CA) of the obtained hydrophobically modified cotton filter fabric reached 145.0°, the residual contact angle (RCA) after the water droplet retention time of 210 min could still arrive at 125.4°, showing a corresponding attenuation rate (Dr) of 13.5%, which suggested excellent hydrophobicity and durability. Notably, the hydrophobically modified cotton filter fabric also exhibited excellent resistance to chemical corrosion, abrasion resistance and ultrasonic stripping resistance. Furthermore, this hydrophobically modified filter fabric can efficiently separate different types of oil–water mixtures. Even after 12 cycles of oil–water separation process, the separation efficiency still exceeded 95%, and the CA of the modified filter fabric before and after separation was basically unchanged.
研究领域:
材料科学
·
纺织工程
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Menglan Zhao,Yu Wang,Hui Zhao,Zihan Zhang,Juntong Su,Xu Ma,Fanping Kong,Yuan Xie,Zequn Ma,Qian Zhang,Zilin Meng
Dithiocarbamate (DTC) with different molecular weight were prepared to modify Mg-Al layered double hydroxides (LDH-DTC) for adsorbing Cu(II), Pb(Ⅱ), Zn(Ⅱ), Cd(Ⅱ) from contaminated soil. The structural and morphology characterization indicated that DTC was wrapped outsides LDHs layer, and the coating layer became thicker with the increase of DTC molecular weight. The adsorption performance of LDH-DTC for heavy metal was investigated and adsorption kinetics was well followed pseudo-second-order and intraparticle diffusion model. The data of adsorption isotherm showed that the adsorption of Cu/Pb fitted Freundlich model, while the adsorption process of Zn/Cd fitted Langmuir model. Additionally, adsorption mechanism of LDH-DTC for Cu(II)/Pb(Ⅱ)/Zn(Ⅱ)/Cd(Ⅱ) with different concentration was explored. As the concentration of heavy metals was low, heavy metals first react with DTC encapsulated outside LDHs. With the increase of concentration, adsorption site of DTC was completely occupied, Cu(Ⅱ)/Pb(Ⅱ) began to react with the exposed LDHs layer to form precipitation, and Zn(Ⅱ)/Cd(Ⅱ) were immobilized on the LDHs layer by isomorphous replacement. The effects of pH, coexistence ions, heavy metal leaching, reuse, column leaching, and metal morphology classification experiments were also conducted, and these results revealed a high stability and favorable interception. The excellent adsorption performance suggested LDHs modified by DTC offered a promising method to immobilize heavy metals from soil and into practical application.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2018
·Vol. 10
·期 42
·19846-19853
·
IF 7.233
Bin Qi,Xin Li,Liang Sun,Bo Chen,Hao Chen,Chenchen Wu,Haibo Zhang,Xiaohai Zhou
Supramolecular nano-assemblies with tunable morphology have attracted extensive attention in composite material manufacturing and many other fields. Herein, a new class of shape-controlled dodecaborate-based supramolecular organic frameworks (BOFs), decorated with diverse ultrafine noble metal clusters (Au, Pd, Pt, Ag), has been successfully fabricated via the tunable host–guest assembly of cucurbit[n = 5,6,7,8]uril and Cs2[closo-B12H12]. Due to the unique dodecaborate-cucurbit[n]uril chaotropic effect, a breakthrough has been made in modulating the supramolecular frameworks in the urchin-like, network-like or octahedron-like structures without tedious chemical modifications or additional additives. More interestingly, Cs2[closo-B12H12], a prominent component in supramolecular structures, can also play dual roles as an excellent reductant and capping agent for the formation of metal clusters. The final product, i.e., BOFs decorated with ultrafine metal clusters (metal/BOFs) can be precipitated from aqueous solutions rapidly and they show high catalytic activity and recyclability in Suzuki reactions and in the selective reduction of furfural (FAL) to furfuryl alcohol (FOL).
研究领域:
材料科学
·
化学工程
·
纳米技术
·
催化
✓ 已验证
DOI
PubMed
高影响因子
iScience
·
2023
·
IF 5.8
Zhidan Liu,Kang Kang,Shulin Shan,Shuai Wang,Xianjie Li,Hui Yong,Zhengcheng Huang,Yiyu Yang,Zhaoxiong Liu,Yanan Sun,Yao Bai,Fuyong Song
Exposure to carbon disulfide (CS 2 ) has been associated with an increased incidence of parkinsonism in workers, but the mechanism underlying this association remains unclear. Using a rat model, we investigated the effects of chronic CS 2 exposure on parkinsonian pathology. Our results showed that CS 2 exposure leads to significant motor impairment and neuronal damage, including loss of dopaminergic neurons and degeneration of the substantia nigra pars compacta (SNpc). The immunoassays revealed that exposure to CS 2 induces aggregation of α-synuclein and phosphorylated α-synuclein, as well as activation of necroptosis in the SNpc. Furthermore, in vitro and in vivo experiments demonstrated that the interaction between α-synuclein and the necrosome complex (RIP1, RIP3, and MLKL) is responsible for the loss of neuronal cells after CS 2 exposure. Taken together, our results demonstrate that CS 2 -mediated α-synuclein aggregation can induce dopaminergic neuron damage and parkinsonian behavior through interaction with the necrosome complex.
研究领域:
神经科学
·
毒理学
·
病理学
✓ 已验证
DOI
PubMed
高影响因子
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