发布求助
文献互助 智能选刊 最新文献

Journal of Chemical Research-s最新文献

筛选
英文 中文
Structure–activity relationship of an A-site-doped LaNiO3/SiO2 catalyst a位掺杂LaNiO3/SiO2催化剂的构效关系
Journal of Chemical Research-s Pub Date : 2022-03-01 DOI: 10.1177/17475198211055091
Jun-Zhi Wu, Caimei Miao, Fenfang Mu, Xiaoyan Wang, J. Bai, Hong Wang
{"title":"Structure–activity relationship of an A-site-doped LaNiO3/SiO2 catalyst","authors":"Jun-Zhi Wu, Caimei Miao, Fenfang Mu, Xiaoyan Wang, J. Bai, Hong Wang","doi":"10.1177/17475198211055091","DOIUrl":"https://doi.org/10.1177/17475198211055091","url":null,"abstract":"Improving the anti-carbon deposition and anti-sintering ability under the premise of maintaining high catalytic activity is the core issue of Ni-based catalysts applied in CO methanation reactions. To address this issue, a La0.75A0.25NiO3/SiO2 (A = Ce, Sr, Sm, and Ca) catalyst is prepared via a citric acid complexation method. XRD results show that the substituted elements (Sr, Sm, and Ca) enter the LaNiO3 lattice and partially replace the A-site element La. The reduced Ni0 is beneficial to improve the medium temperature activity of the catalyst. The substitution of different elements produces different electronic effects that significantly affect the size of the Ni particles and the interaction between Ni and La2O3. The catalyst with doped Ca2+ as the A-site substituted element demonstrates better adsorption, storage, and migration capabilities for oxygen due to the lattice distortion that easily produces oxygen vacancies. Catalysts doped with Sr, Sm, and Ca as the A-site substituted element produce La2O2CO3 after the reactions, which plays a role in eliminating carbon deposits.","PeriodicalId":15318,"journal":{"name":"Journal of Chemical Research-s","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80493453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A visible-light-responsive DiSCn(3)-type fluorescent probe for the rapid, sensitive, and specific detection of tin(II) ions in aqueous solution 一种快速、灵敏、特异检测水溶液中锡离子的可见光响应型DiSCn(3)型荧光探针
Journal of Chemical Research-s Pub Date : 2022-03-01 DOI: 10.1177/17475198221089833
Ruiji Li, Dong Wang, Xiaoyun Li, Zehui Zhang, Wei Li
{"title":"A visible-light-responsive DiSCn(3)-type fluorescent probe for the rapid, sensitive, and specific detection of tin(II) ions in aqueous solution","authors":"Ruiji Li, Dong Wang, Xiaoyun Li, Zehui Zhang, Wei Li","doi":"10.1177/17475198221089833","DOIUrl":"https://doi.org/10.1177/17475198221089833","url":null,"abstract":"Visible-light-excited fluorescent probes with excellent water solubility are of significant research importance in the biomedical field. In this work, a series of visible-light-responsive carbocyanine fluorescent compounds [DiSCn(3)] are synthesized from 2-methylbenzothiazole and are employed as fluorescent probes for detecting tin(II) ions. Upon addition of tin(II) ions to an aqueous solution of compounds DiSCn(3)-3 and 4, both exhibit considerable changes in their absorption and fluorescent intensity, respectively. These spectral changes may correspond to the binding between tin(II) ions and the sulfur atom in the benzothiazole unit to form a metal complex. This indicates that DiSCn(3)-3 and 4 can be used as promising fluorescent chemical sensors for detecting tin(II) ions in aqueous solution via visible-light excitation.","PeriodicalId":15318,"journal":{"name":"Journal of Chemical Research-s","volume":"87 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91105769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Synthesis and electrochemical properties of a nickel(II) thiacalix[4]arene-based electrocatalyst for the hydrogen evolution reaction 镍(II)噻吩[4]芳烃基析氢电催化剂的合成及电化学性能
Journal of Chemical Research-s Pub Date : 2022-03-01 DOI: 10.1177/17475198221109123
H. El Moll, Khalaf M. Alenezi, Ashanul Haque, J. Humaidi, Raoudha Soury, E. Azzam, Fahad Abdulaziz, Salman Latif, M. Vraneš
{"title":"Synthesis and electrochemical properties of a nickel(II) thiacalix[4]arene-based electrocatalyst for the hydrogen evolution reaction","authors":"H. El Moll, Khalaf M. Alenezi, Ashanul Haque, J. Humaidi, Raoudha Soury, E. Azzam, Fahad Abdulaziz, Salman Latif, M. Vraneš","doi":"10.1177/17475198221109123","DOIUrl":"https://doi.org/10.1177/17475198221109123","url":null,"abstract":"Thiacalix[4]arene with four sulfur-bridging atoms and four hydroxy coordinating groups in the lower rim is a promising candidate for powerful electrocatalytic hydrogen production. However, there are only a few examples reported in the literature where conjugated thiacalix[4]arene is used as a pre-catalyst for the hydrogen evolution reaction. The present work evaluates the electrocatalytic performance of a nickel(II) coordination complex based on generic thiacalix[4]arene. The coordination complex is characterized by cyclic voltammetry, where two reduction peaks are observed at −0.57 and −1.33 V for the two redox couples Ni2+/Ni+ and Ni+/Ni, respectively. The proton reduction occurs at the second peak potential with a slight shift at about −1.0 V, with increasing peak currents directly related to the number of acetic acid equivalents. The maximum peak current was observed to be at about 67 µA for 20 equiv. of acetic acid.","PeriodicalId":15318,"journal":{"name":"Journal of Chemical Research-s","volume":"69 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88213615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Study on the performance of laterite in removing graphene oxide contaminants from aqueous solution 红土去除水溶液中氧化石墨烯污染物的性能研究
Journal of Chemical Research-s Pub Date : 2022-01-01 DOI: 10.1177/17475198211060481
Beifeng Lv, Kai Xu, C. Fang, Qin Yang, Na Li, Ping Jiang, Wei Wang
{"title":"Study on the performance of laterite in removing graphene oxide contaminants from aqueous solution","authors":"Beifeng Lv, Kai Xu, C. Fang, Qin Yang, Na Li, Ping Jiang, Wei Wang","doi":"10.1177/17475198211060481","DOIUrl":"https://doi.org/10.1177/17475198211060481","url":null,"abstract":"To remove graphene oxide contaminant from aqueous solution, laterite was used as an adsorbent to conduct batch adsorption experiments on graphene oxide aqueous solutions. The effects of pH, adsorbent mass, graphene oxide initial concentration, contact time, and temperature on graphene oxide adsorption by laterite were studied predominantly. The results show that graphene oxide adsorption by laterite strongly depends on pH, the kinetic data conforms to the second-order kinetic model, and the isotherm data are in line with Langmuir and Freundlich models. Moreover, temperature increment is more conducive to improving the adsorption capacity. Combined with scanning electron microscopy, transmission electron microscopy, atomic force microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy and Raman microscopic tests, the internal changes of samples before and after adsorption were further revealed. The comprehensive analysis of the above experimental results shows that laterite is a good material, which can effectively remove graphene oxide contamination from aqueous solutions.","PeriodicalId":15318,"journal":{"name":"Journal of Chemical Research-s","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75305352","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Deposition of metallic silver from versatile amidinate precursors for use in functional materials 功能材料用多用途氨基酸盐前驱体沉积金属银
Journal of Chemical Research-s Pub Date : 2022-01-01 DOI: 10.1177/17475198221075301
Shreya Mrig, Martha A Jennings, Malavika A. Bhide, Clare Bakewell, C. Knapp
{"title":"Deposition of metallic silver from versatile amidinate precursors for use in functional materials","authors":"Shreya Mrig, Martha A Jennings, Malavika A. Bhide, Clare Bakewell, C. Knapp","doi":"10.1177/17475198221075301","DOIUrl":"https://doi.org/10.1177/17475198221075301","url":null,"abstract":"Silver (Ag) amidinate metal organic decomposition precursors of the type: [Ag2((ArN)2C(H))2] (Ar = 2,6-dimethylphenyl (1), 2,6-diethylphenyl (2) and 2,6-diisopropylphenyl (3)) have been used for the first time in the deposition of Ag films on glass with multiple functionalities with potential application in optical/biological sensors or for use in electronic circuitry. Precursors 1–3 were isolated from the reaction of silver acetate with the appropriate ligand in a 1:2 stoichiometry and were characterized by 1H and 13C{1H} NMR, thermal gravimetric analysis and single crystal X-ray diffraction for 2. Single-layer depositions at 200 °C on glass substrates via spin coating produced transparent (>90% transmittance) coatings, with well-defined Ag nanoparticles. Multi-layer depositions at 200 °C on glass had a metallic lustre and were found to be conductive (ρ = 0.916–1.83 × 10−6 Ωm). All films were strongly adhered and displayed excellent coverage of the substrate. Ag films deposited from 1 to 3 were analysed by grazing incidence X-ray diffraction, X-ray photoelectron spectroscopy, energy-dispersive X-ray analysis and scanning electron microscopy, with optical properties determined by UV-Vis spectroscopy.","PeriodicalId":15318,"journal":{"name":"Journal of Chemical Research-s","volume":"48 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80559721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Design, synthesis, and characterization of a series of novel β-cyclodextrin functional monomers 一系列新型β-环糊精功能单体的设计、合成和表征
Journal of Chemical Research-s Pub Date : 2022-01-01 DOI: 10.1177/17475198211073281
Zhimin Liu, Zhigang Xu, Liping Ma
{"title":"Design, synthesis, and characterization of a series of novel β-cyclodextrin functional monomers","authors":"Zhimin Liu, Zhigang Xu, Liping Ma","doi":"10.1177/17475198211073281","DOIUrl":"https://doi.org/10.1177/17475198211073281","url":null,"abstract":"In order to increase its solubility in water and improve β-cyclodextrin combination with guest molecules, chemical modification of β-cyclodextrin is a feasible and effective method. A variety of β-cyclodextrin derivatives are designed and introduced for pharmaceutical complexation and analytical chemistry application. In this study, a series of β-cyclodextrin derivatives containing unsaturated bonds is designed and synthesized. The products are characterized by MS, FTIR, 1H NMR, and 13C NMR. Some of the functional monomers may be used in the preparation of molecularly imprinted polymers, and preliminary studies have shown excellent molecular recognition ability. The prepared β-cyclodextrin functional monomers have potential application value in molecular recognition materials based on polymers.","PeriodicalId":15318,"journal":{"name":"Journal of Chemical Research-s","volume":"53 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89792114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Spin coating method deposited nickel oxide thin films with various film thicknesses 自旋镀膜法沉积了不同膜厚的氧化镍薄膜
Journal of Chemical Research-s Pub Date : 2022-01-01 DOI: 10.1177/17475198211066535
Lakel Abdelghani, Lakel Said, B. Said, Belahssen Okba
{"title":"Spin coating method deposited nickel oxide thin films with various film thicknesses","authors":"Lakel Abdelghani, Lakel Said, B. Said, Belahssen Okba","doi":"10.1177/17475198211066535","DOIUrl":"https://doi.org/10.1177/17475198211066535","url":null,"abstract":"The objective of this research is to study the influence of film thickness on the optical and electrical properties of prepared NiO thin films. Nickel oxide thin films have been prepared on the glass substrates by a spin coating technique using nickel nitrate hexahydrate (Ni(NO3)2.6H2O) as a source of materials. The coating process was repeated 11, 13, 15, and 17 layer times to obtain a good NiO thin film. The optical and electrical characterizations were observed to be dependent on each film thickness. The smaller layers have a high optical transmission (over 88%) in the visible range. The bandgap energy was found to be in the range of 3.94–4.06 eV depending on the film thickness. The lowest value of Urbach energy was 0.182 eV. The electrical measurements are investigated by the four-point method; the results show that good electrical conductivity was found for the sample with a thickness around 171 nm.","PeriodicalId":15318,"journal":{"name":"Journal of Chemical Research-s","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74415636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Palladium-catalyzed Hiyama cross-couplings of pyrimidin-2-yl tosylates with organosilanes 钯催化的嘧啶-2-酰基苯甲酸酯与有机硅烷的Hiyama交叉偶联
Journal of Chemical Research-s Pub Date : 2022-01-01 DOI: 10.1177/17475198211067163
Hai-Peng Gong, Zhengjun Quan, Xi‐Cun Wang
{"title":"Palladium-catalyzed Hiyama cross-couplings of pyrimidin-2-yl tosylates with organosilanes","authors":"Hai-Peng Gong, Zhengjun Quan, Xi‐Cun Wang","doi":"10.1177/17475198211067163","DOIUrl":"https://doi.org/10.1177/17475198211067163","url":null,"abstract":"An efficient palladium-catalyzed Hiyama reaction between various pyrimidin-2-yl tosylates with organosilanes has been developed. The use of CuCl with TBAF as additive is essential for promotion of the construction of the carbon–carbon bond. This procedure shows wide functional group tolerance for electrophilic pyrimidin-2-yl tosylates and has been extended to aromatic amino-substituted pyrimidin-2-yl tosylates, affording the desired C2-aryl and alkenyl pyrimidine derivatives in good to excellent yields.","PeriodicalId":15318,"journal":{"name":"Journal of Chemical Research-s","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79334023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesis of aluminum alkylphosphinates under atmospheric pressure 常压下烷基膦酸铝的合成
Journal of Chemical Research-s Pub Date : 2022-01-01 DOI: 10.1177/17475198211073275
Mengting Zhang, Shengbin Shi, Y. Lei, Liuyue Gu, Lijing Gao, G. Xiao
{"title":"Synthesis of aluminum alkylphosphinates under atmospheric pressure","authors":"Mengting Zhang, Shengbin Shi, Y. Lei, Liuyue Gu, Lijing Gao, G. Xiao","doi":"10.1177/17475198211073275","DOIUrl":"https://doi.org/10.1177/17475198211073275","url":null,"abstract":"Alkylphosphinates have received extensive attention in the past few decades because of their very useful mechanical properties, electrical properties, low density, and low toxicity, and have been widely used in flame-retardant materials and other fields. In this work, aluminum diethylphosphinate is successfully synthesized under atmospheric pressure. More importantly, two novel dialkylphosphinates, aluminum dioctylphosphinate and aluminum didecylphosphinate, are first synthesized and characterized. The structures of these aluminum dialkylphosphinates are confirmed by nuclear magnetic resonance, Fourier-transform infrared spectroscopy, and high-resolution mass spectrometry, and the microscopic morphology and thermal stability are analyzed by scanning electron microscopy and thermogravimetric analysis, respectively. Furthermore, conditions for the synthesis of aluminum dioctylphosphinate are optimized. Compared with the traditional method of synthesizing dialkylphosphinates under high pressure, the method reported in this paper has the advantages of high safety, easy operation, and low economic cost, which makes it suitable for industrial production.","PeriodicalId":15318,"journal":{"name":"Journal of Chemical Research-s","volume":"40 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86289946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Chemical constituents from the leaves of Tripterygium wilfordii and their cytotoxic activity 雷公藤叶化学成分及其细胞毒活性研究
Journal of Chemical Research-s Pub Date : 2022-01-01 DOI: 10.1177/17475198211062836
Zhi-Chao Jiang, Zi-Heng Li, Peng Li
{"title":"Chemical constituents from the leaves of Tripterygium wilfordii and their cytotoxic activity","authors":"Zhi-Chao Jiang, Zi-Heng Li, Peng Li","doi":"10.1177/17475198211062836","DOIUrl":"https://doi.org/10.1177/17475198211062836","url":null,"abstract":"A new flavonol glycoside derivate named kaempferol 3-O-trans-p-coumaroyl-7-O-α-ʟ-rhamnoside (1), together with five known compounds (2–6), was isolated from the EtOAc-soluble extract of the leaves of Tripterygium wilfordii. The structure of new compound was elucidated with spectroscopic and physico-chemical analyses. All the isolates were evaluated for in vitro cytotoxic activity against four human cancer cells including HepG2, Hep3B, A549 and MCF-7. Among them, compound 1 exhibited the significant cytotoxic activities against HepG2 and Hep3B cells with IC50 values of 6.8 ± 1.6 and 4.2 ± 1.3 μM, respectively. The above data demonstrated the potential of 1 for the treatment of liver cancer. In addition, 4 also showed moderate inhibitory activity on HepG2 and Hep3B cells with IC50 values of 16.1 ± 2.3 and 10.7 ± 1.8 μM, respectively.","PeriodicalId":15318,"journal":{"name":"Journal of Chemical Research-s","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85042489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
首页 上一页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信