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1. Mechanism Study of Iron(Ⅲ)-Porphyrin Catalyzed Cycloproanation of Aromatic Alkene with Trifluoroethylamine Hydrochloride | |||
Xiao Jiang,Liu Qiang | |||
Chemistry 31 May 2020 | |||
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Abstract:A substrate scopes of cyclopropanation has been expanded with trifluoroethylamine hydrochloride catalyzed by TPFPPFeCl under a user-friendly condition. Trifluoromethyl-substituted cyclopropanes were generated with high diastereoselectivity and yield, employing styrene derivatives and other heterocyclic alkene as substrates. Moreover, mechanism study shows TPFPP(NO) is the most important reaction intermediate which has not been reported in other metalloporphyrin-catalyzed cyclopropanation reactions. | |||
TO cite this article:Xiao Jiang,Liu Qiang. Mechanism Study of Iron(Ⅲ)-Porphyrin Catalyzed Cycloproanation of Aromatic Alkene with Trifluoroethylamine Hydrochloride[OL].[31 May 2020] http://en.paper.edu.cn/en_releasepaper/content/4752267 |
2. A Novel Gold (I) Complex of 1,3-Bis(diphenylphosphino)propane: Synthesis, Crystal Structure and C-H...Au Interaction | |||
YANG Xian,HU Kai,WANG Hao,YUAN Haokun,FANG Ruiqin | |||
Chemistry 29 September 2019 | |||
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Abstract:A new diphosphine gold (I) complex [Au2(Ph2PCH2CH2CH2PPh2)(CHCPhOMe)2] (compound 1) containing organophosphine and alkyne ligands has been designed and synthesized. The Au(I) ion is coordinated by P atom from 1,3-bis(diphenylphosphanyl)propane and alkynyl from 1-ethynyl-4-methoxybenzene. The molecular structure of compound 1 has been determined by single crystal X-ray diffraction. Compound 1 crystallizes in the monoclinic space group C2/c with lattice contents a=26.5021(5), b=6.83920(10), c=22.6226(5) Å, α=90.00°, β=98.026(2)°, γ=90.00°, V=4060.25(13) Å3, and Z=4. The final R=0.0282 and wR=0.0568 for 3059 observed reflections with I>2σ(I). The most interesting structural feature of compound 1 is the presence of C-H⋅⋅⋅Au interactions involving Au ions in chain motifs, with H⋅⋅⋅Au distance of 3.233 Ǻ, and C-H⋅⋅⋅Au bond angle of 168.2°. | |||
TO cite this article:YANG Xian,HU Kai,WANG Hao, et al. A Novel Gold (I) Complex of 1,3-Bis(diphenylphosphino)propane: Synthesis, Crystal Structure and C-H...Au Interaction[OL].[29 September 2019] http://en.paper.edu.cn/en_releasepaper/content/4749721 |
3. Influence of Preparation Condition on the Performance of Ni-based Catalysts for the Glycerol Steam Reforming | |||
XIE Shuang,Zhang Xianghua,Tu Qiang,Shi Biao,Cui Yuehua,Chen Changguo | |||
Chemistry 11 May 2018 | |||
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Abstract:The effect of preparation condition on the performance of Ni-based catalysts was investigated for the glycerol steam reforming. The La0.7Ce0.3NiO3 mixed oxides were synthesized using different solution concentrations and calcination temperatures by co-precipitation method. BET, ICP, XRD, TPR, FE-SEM, CO2-TPD, TGA and Raman spectroscopy were used to characterize the catalysts. Including La2NiO4 phase at lowest solution concentration, catalyst precursor included LaNiO3 phase instead of La2NiO4 at other solution concentrations. At low calcination temperature of 700 C, it was found that smaller particle size of CeO2 incorporated more lanthanum, higher surface basicity and La2O2CO3 phase could effectively inhibit and eliminate coking leading to the better performance of catalyst. | |||
TO cite this article:XIE Shuang,Zhang Xianghua,Tu Qiang, et al. Influence of Preparation Condition on the Performance of Ni-based Catalysts for the Glycerol Steam Reforming[OL].[11 May 2018] http://en.paper.edu.cn/en_releasepaper/content/4745028 |
4. An Electrochemical Sensor for Prothrombin-Time Test | |||
XIN Lifei,LIU Hong | |||
Chemistry 22 March 2018 | |||
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Abstract:As a new interdisciplinary, blood coagulation and thrombosis, being involved in the development and progression of many diseases, have a prominent clinical significance. Prothrombin time (PT time) is the time when calcium and tissue factor is added into the blood sample until when the blood sample completely clots. Clinically, PT time is an extremely sensitive screening index in coagulation system, it has an irreplaceable influence to patients\' daily medication and related treatments as it can primarily reflect the normality of the extrinsic coagulation. Until recently, most automated coagulation analyzers used in hospitals can detect a variety of samples and projects at the same time with high accuracy. However it could only be operated by the professionals, not to mention the high production and testing costs. For these reasons, the frequency and ease-of-operation of the detection have been limited. In order to develop a real-time and household detection method, paper-chips and POCT technology are mainly utilized in this work. Paper-chips possesses their own advantages, as it can easily reflect the blood clotting process by detecting a change in the conductance of blood during the blood coagulation process. After a series of design, tests and improvements, a chip for PT time testing is fabricated. Using this chip, the PT time of several blood samples are tested, and the testing results confirmed that the further improved chip can complete the measurement and correction of blood PT time test. Compared with conventional coagulation analyzer, paper-chips have several intrinsic advantages such as reduced cost, higher accuracy, and better application in POCT use. We believe that pushing the further experimental products to market could fill the vacancy in the domestic industry. | |||
TO cite this article:XIN Lifei,LIU Hong. An Electrochemical Sensor for Prothrombin-Time Test[OL].[22 March 2018] http://en.paper.edu.cn/en_releasepaper/content/4744019 |
5. A colorimetric and fluorescent probe for rapid determination of copper in water and living cells | |||
Nie Hailiang,Zhang Xiaoling | |||
Chemistry 27 April 2017 | |||
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Abstract:Detection of copper ions (Cu2+) is of great significance in protecting the environment and human health. In the present work, we developed a new colorimetric and fluorescent probe for Cu2+ determination with high selectivity and rapid-response rate. Upon Cu2+ addition, the probe underwent an 86 nm blue-shift in absorption peak wavelength as well as a significant quenching in fluorescence emission. The fluorescence intensity at 575 nm showed a good linear relationship (R2 = 0.999) with the Cu2+ concentration in the range of 0 μM ~ 12 μM. Using the probe as an analytical tool, the detection of Cu2 + can be done within 5 s, whose process was not subject to interference from other metal ions and pH changes. Moreover, the probe can be used for Cu2+ assay in both real water sample and living cells. | |||
TO cite this article:Nie Hailiang,Zhang Xiaoling. A colorimetric and fluorescent probe for rapid determination of copper in water and living cells[OL].[27 April 2017] http://en.paper.edu.cn/en_releasepaper/content/4728954 |
6. The development of the material for FA detection for Environmental and Health Monitoring | |||
Bi Anyao,Yang Shuqi,Liu Min,Wang Xiaobo,Zeng Wenbin | |||
Chemistry 18 April 2017 | |||
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Abstract:Formaldehyde (FA), as a vital industrial chemical, is widely used in building materials and numerous living products. It has become one of the most important air pollutants in residential and industrial occupational environments. Studies have shown FA is easy to react with nucleophilic material leading to the formation of DNA damage. Additionally, the Alzheimer's disease has also related to the intake of FA. The concentration of FA in our surroundings especially in urban environment has attracted increasingly attention. Thus, developing a rapid, sensitive and facile method to determine the concentration levels of FA becomes highly desirable. Up to now, many types of FA sensing methods have been applied to detect and quantify the FA concentration. Herein, we summarized the recent development of the material for FA detection and their application in environmental and health monitoring, with a focus on fluorescent probe, nanomaterials, and biomolecules. Nevertheless, the further trend of related development from lab to indoors was also proposed. | |||
TO cite this article:Bi Anyao,Yang Shuqi,Liu Min, et al. The development of the material for FA detection for Environmental and Health Monitoring[OL].[18 April 2017] http://en.paper.edu.cn/en_releasepaper/content/4724917 |
7. Study on Synthesis and Electrochemical Performance of PMo-PDDA-GO Composite | |||
Ding Chao ,Gu Dawei,Lu Yi ,Xu Tianye ,Sun Hongshun,Li Jishu, Wang Lei,Shen Linjiang | |||
Chemistry 28 March 2017 | |||
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Abstract:A series of composites containing polyoxometalate (PMo), poly (diallyldimethylammonium chloride) (PDDA), and graphene oxide (GO) with different oxidation degrees were prepared in a two-step self-assembly process. The resulting polyoxometalate-poly (diallyldimethylammonium chloride)-graphene oxide (PPGx, x = 1 to 5) composites and their precursors (PDDA-GOx, x = 1 to 5) were analyzed with AFM, XRD, and FTIR spectroscopy. The self-assembly process was schematically summarized. The interspace distance between GO sheets in PPGx increased when the oxidation degree of GO increased. This increase in interspace distance was accompanied by a rapid decrease in the electrical conductivity of PPGx. At a sufficient high oxidation degree (x > 3), PDDA was completely inserted into the interspace of the laminated structure of the GO sheets in PPGx. The experimental results indicated that PDDA acted as a bridge, increasing electrostatic interaction between PMo anions and the GO sheets and causing many PMo anions to become anchored on the GO sheets. The electrochemical performances of the PPGx composites were greatly enhanced by the immobilization of PMo anions on GO sheets via PDDA, resulting in a much larger specific capacitance and a remarkably enhanced cycling stabilityIn this paper. | |||
TO cite this article:Ding Chao ,Gu Dawei,Lu Yi , et al. Study on Synthesis and Electrochemical Performance of PMo-PDDA-GO Composite[OL].[28 March 2017] http://en.paper.edu.cn/en_releasepaper/content/4723025 |
8. Three new complexes of Eu3+ ion with polydentate Schiff base ligands: Synthesis, crystal structure, and luminescence properties | |||
QIN Jin,NI Chanchan,GAO Xusheng | |||
Chemistry 24 February 2017 | |||
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Abstract:Three europium complexes, Eu(DAPABH)2Cl3 (1), Eu(DAPMBH)2(NO3)3.2H2O (2) and Eu(DAPBSH)(DMSO)2NO3(OH)2 (3) have been synthesized and characterized by various spectroscopic techniques, where DAPABH=2,6-diacetylpyridine-bis(4-aminobenzoyhydrazone), DAPMBH=2,6-diacetylpyridine-bis(4-methoxybenzoyhydrazone), DAPBSH=2,6-diacetylpyridine-bis(benzenesulfonyldrazide). The crystal structure of 1 and 3 were established via single crystal X-ray crystallography. The Eu3+ ion is ten-coordinated with six N-atoms and four O-atoms from two pentadentate DAPABH ligands to form a bicapped tetragonal antiprism geometry in 1, while the nine-coordinate Eu3+ ion is bound to two oxygen atoms of the nitrate counter ion, three N-atoms and two O-atoms of a pentadentate DAPBSH ligands as well as to two oxygen atoms of two disorder dimethyl sulfoxide molecules with a bicapped tetragonal antiprism coordination environment in 3. We have exploited their photo-physical abilities through fluorescence excitation spectrum and fluorescence emission spectrum both in solid state and solution state. | |||
TO cite this article:QIN Jin,NI Chanchan,GAO Xusheng. Three new complexes of Eu3+ ion with polydentate Schiff base ligands: Synthesis, crystal structure, and luminescence properties[OL].[24 February 2017] http://en.paper.edu.cn/en_releasepaper/content/4719278 |
9. Total Synthesis of Mangiferin, Homomangiferin, and Neomangiferin | |||
WEI Xiong,LIANG Danlin,WANG Qing,MENG Xiangbao,LI Zhongjun | |||
Chemistry 26 July 2016 | |||
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Abstract:Total synthesis of mangiferin, homomangiferin, and neomangiferin, three C-glycosyl xanthone natural products with a wide spectrum of pharmacological effects, have been achieved starting from 2,3,4,6-tetra-O-benzyl-glucopyranose. The key steps involve a stereoselective Lewis acid promoted C-glycosylation of protected phloroglucinol with tetrabenzylglucopyranosyl acetate and a highly regioselective base-induced cyclization for the construction of the core xanthone skeleton. | |||
TO cite this article:WEI Xiong,LIANG Danlin,WANG Qing, et al. Total Synthesis of Mangiferin, Homomangiferin, and Neomangiferin[J]. |
10. A novel non-enzymatic hydrogen peroxide sensor based on Mn2O3-Fe2O3 loaded carbon fibers | |||
LI Can,LI Mian,BO Xiangjie,GUO Liping | |||
Chemistry 10 June 2016 | |||
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Abstract:In this paper, a novel manganese-iron oxide embedded carbon fibers (Mn2O3-Fe2O3/CFs) has been successfully prepared for the first time through electrospinning and calcination. A series of samples with various Mn/Fe molar ratios (1:0, 3:1, 1:1, 1:3, 0:1) were synthesized by the same way to optimize catalytic ability. Structural characterizations reveal that Mn2O3-Fe2O3/CFs possesses 3D net-like structure. Electrochemical measurements reveal that Mn2O3-Fe2O3/CFs (3:1) shows the best catalysis ability for hydrogen peroxide (H2O2) reduction and acquires better detection parameters (such as: the fast response time (< 2 s), wide linear range (0.01-15.4 mM), good stability, and surpassingly selective capability). Such excellent performances are attributed to the following three factors: (1) the high catalytic ability of the Mn phase in the composites; (2) the 3D net-like CFs with high electrical conductivity, large surface area and more exposed active sites; (3) the synergistic effect between Mn2O3 and Fe2O3. In addition, Mn2O3-Fe2O3/CFs (3:1) can be applied to the analysis of H2O2 in human serum samples with satisfactory results. | |||
TO cite this article:LI Can,LI Mian,BO Xiangjie, et al. A novel non-enzymatic hydrogen peroxide sensor based on Mn2O3-Fe2O3 loaded carbon fibers[OL].[10 June 2016] http://en.paper.edu.cn/en_releasepaper/content/4697548 |
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