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Dissolution and recrystallization of perovskite induced by N-methyl-2-pyrrolidone in a closed steam annealing method
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作者 Lili Zhi Yanqing Li +4 位作者 Xiaobing Cao Yahui Li Xian Cui Lijie Ci Jinquan Wei 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2019年第3期78-83,共6页
High quality perovskite films with large columnar grains are greatly desired for efficient perovskite solar cells. Here, low volatility N-methyl-2-pyrrolidone(NMP) was added in MAI/IPA solution in a two-step spin-coat... High quality perovskite films with large columnar grains are greatly desired for efficient perovskite solar cells. Here, low volatility N-methyl-2-pyrrolidone(NMP) was added in MAI/IPA solution in a two-step spin-coating method, which promoted the conversion of lead iodide to perovskite. The perovskite films were annealed by a closed-steam annealing method to prolong the recrystallization process of perovskite films assisted by the residual NMP. It leaded to high quality CH_3NH_3PbI_3 perovskite films with large columnar grains due to its enhancement of the Oswald ripening. The large grain perovskite film leaded to efficient carrier transformation and injection, and low recombination. The photovoltaic performance of the perovskite solar cells was improved significantly. 展开更多
关键词 PEROVSKITE solar cell n-methyl-2-pyrrolidone (NMP) DISSOLUTION and RECRYSTALLIZATION Closed-steam ANNEALING Oswald RIPENING
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Excess Molar Volumes and Viscosities of Binary Mixtures of p-Xylene with Cyclohexane, n-Heptane, n-Octane, Sulfolane, N-Methyl-2-pyrrolidone and Acetic Acid at 303.15 K and 323.15 K and Atmospheric Pressure
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作者 杨长生 马沛生 周清 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2004年第5期700-706,共7页
Experimental data on density and viscosity at 303.15K and 323.15K are presented for the binary mixtures of p-xylene with cyclohexane, n-heptane, n-octane, sulfolane, N-methyl-2-pyrrolidone and acetic acid.From these d... Experimental data on density and viscosity at 303.15K and 323.15K are presented for the binary mixtures of p-xylene with cyclohexane, n-heptane, n-octane, sulfolane, N-methyl-2-pyrrolidone and acetic acid.From these data, the excess molar volume and deviations in viscosity have been calculated. The computed quantities have been fitted to the Redlich-Kister Equation to derive coefficients and estimate the standard error values. Results are discussed in terms of intermolecular interactions. 展开更多
关键词 density viscosity p-xylene alkane SULFOLANE n-methyl-2-pyrrolidone
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Ethylene absorption in N-methyl-2-pyrrolidone/silver nano-solvent:Thermodynamics and kinetics study
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作者 Mohammad Yousefi Shima Azizi +1 位作者 S.M.Peyghambarzadeh Zoha Azizi 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2021年第8期57-66,共10页
The effect of presence of silver nanoparticles in pure N-methyl-2-pyrrolidone(NMP)solvent for ethylene gas absorption in an experimental pressure decaying setup has been investigated.All experiments were performed at ... The effect of presence of silver nanoparticles in pure N-methyl-2-pyrrolidone(NMP)solvent for ethylene gas absorption in an experimental pressure decaying setup has been investigated.All experiments were performed at temperatures of 278.15 K,298.15 K and 328.15 K and different pressures(up to ethylene dew point)as well as different concentrations of silver nanoparticles(0.05 g·L^(-1) and 0.1 g·L^(-1)).The kinetic data of absorption,Henry’s law constants,and heat of absorption were calculated.Comparison of the pure solvent and the nanofluids absorption results revealed that the presence of small amounts of nanoparticles could improve the absorption performance between 1.5%-18%.Finally,the effect of temperature,pressure,and nanoparticle concentration on the equilibrium results were investigated. 展开更多
关键词 ABSORPTION ETHYLENE n-methyl-2-pyrrolidone(NMP) Nanoparticles SOLUBILITY
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Effective N-methyl-2-pyrrolidone wet cleaning for fabricating highperformance monolayer MoS2 transistors 被引量:1
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作者 Po-Chun Chen Chih-Pin Lin +10 位作者 Chuan-Jie Hong Chih-Hao Yang Yun-Yan Lin Ming-Yang Li Lain-Jong Li Tung-Yuan Yu Chun-Jung Su Kai-Shin Li Yuan-Liang Zhong Tuo-Hung Hou Yann-Wen Lan 《Nano Research》 SCIE EI CAS CSCD 2019年第2期303-308,共6页
Two-dimensional semiconductors,such as MoS2 are known to be highly susceptible to diverse molecular adsorbates on the surface during fabrication,which could adversely affect device performance.To ensure high device yi... Two-dimensional semiconductors,such as MoS2 are known to be highly susceptible to diverse molecular adsorbates on the surface during fabrication,which could adversely affect device performance.To ensure high device yield,uniformity and performance,the semiconductor industry has long employed wet chemical cleaning strategies to remove undesirable surface contaminations,adsorbates,and native oxides from the surface of Si wafers.A similarly effective surface cleaning technique for two-dimensional materials has not yet been fully developed.In this study,we propose a wet chemical cleaning strategy for MoS2 by using N-methyl-2-pyrrolidone.The cleaning process not only preserves the intrinsic properties of monolayer MoS2,but also significantly improves the performance of monolayer MoS2 field-effect-transistors.Superior device on current of 12 μA·μm-1 for a channel length of 400 nm,contact resistance of 15 kΩ·μm,field-effect mobility of 15.5 cm^2·V^-1·s^-1,and the average on-off current ratio of 10^8 were successfully demonstrated. 展开更多
关键词 MONOLAYER M0S2 devices standard WET cleaning FIELD-EFFECT TRANSISTORS n-methyl-2-pyrrolidone
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Synthesis and Characterization of Poly(N-Vinyl-2-Pyrrolidone/Itaconic Acid) Hydrogel
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作者 郭锦棠 李伶 +1 位作者 李雄勇 刘冰 《Transactions of Tianjin University》 EI CAS 2004年第3期176-178,共3页
With N-vinyl-2-pyrrolidone (NVP) and itaconic acid(IA), poly(N-vinyl-2-pyrrolidone/itaconic acid)[P(NVP/IA)] hydrogel was synthesized by free radical solution polymerization. The structure of this (P(NVP/IA)) was char... With N-vinyl-2-pyrrolidone (NVP) and itaconic acid(IA), poly(N-vinyl-2-pyrrolidone/itaconic acid)[P(NVP/IA)] hydrogel was synthesized by free radical solution polymerization. The structure of this (P(NVP/IA)) was characterized by IR. Effects of concentration of itaconic acid, amount of cross-link agent, N,N′-methylene-bis-acrylamide, reaction temperature, and time on properties of swelling ratio(SR) of the hydrogel were investigated.The results show that the best swelling property of the hydrogel is obtained at 50 ℃ and 1.5 h. pH sensitivity increases as the concentration of itaconic acid in the hydrogel system increases. Swelling ratio of the hydrogel decreases as the amount of cross-link agent increases. 展开更多
关键词 HYDROGEL itaconic acid N-vinyl-2-pyrrolidone(NVP) pH sensitivity
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CARBONYLATION OF ALLYL HALIDES CATALYZED BY POLY(N-VINYL-2-PYRROLIDONE) ANCHORED PALLADIUM CATALYST UNDER ATMOSPHERIC PRESSURE
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作者 Han Rong GAO Yun XU +1 位作者 Shi Jian LIAO Dao Rong YUDalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian,116023Laboratory of Organometallic Chemistry,Shanghai Institute of Organic Chemistry,Chinese Academy of Sciences,Shanghai,200032 《Chinese Chemical Letters》 SCIE CAS CSCD 1992年第5期351-354,共4页
Carbonylation of allyl halides catalyzed by poly(N-vinyl-2-pyrro- lidone) anchored palladium catalyst affords β,r-butonic acid under atmo- spheric pressure and at room temperature.The activity and efficiency of the c... Carbonylation of allyl halides catalyzed by poly(N-vinyl-2-pyrro- lidone) anchored palladium catalyst affords β,r-butonic acid under atmo- spheric pressure and at room temperature.The activity and efficiency of the catalyst are much higher than those of the reported catalysts for this reaction. 展开更多
关键词 ANCHORED PALLADIUM CATALYST UNDER ATMOSPHERIC PRESSURE CARBONYLATION OF ALLYL HALIDES CATALYZED BY POLY N-VINYL-2-pyrrolidone
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Measurement and correlation of solid–liquid phase equilibria for binary and ternary systems consisting of N-vinylpyrrolidone, 2-pyrrolidone and water
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作者 Ao Su Sifang Li 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2018年第4期806-811,共6页
The solid–liquid equilibria(SLE)for binary and ternary systems consisting of N-Vinylpyrrolidone(NVP),2-Pyrrolidone(2-P)and water are measured.The phase diagrams of NVP(1)+2-P(2),NVP(1)+water(2),NVP(1)+2-P(2)+1 wt%wat... The solid–liquid equilibria(SLE)for binary and ternary systems consisting of N-Vinylpyrrolidone(NVP),2-Pyrrolidone(2-P)and water are measured.The phase diagrams of NVP(1)+2-P(2),NVP(1)+water(2),NVP(1)+2-P(2)+1 wt%water(3)and NVP(1)+2-P(2)+2 wt%water(3)are identified as simple eutectic type with the eutectic points at 263.75 K(x_(1E)=0.5427),251.65 K(x_(1E)=0.3722),260.25 K(x_(1E)=0.5031)and256.55 K(x_(1E)=0.4684),respectively.The phase diagram of 2-P(1)+water(2)has two eutectic points(x_(1E)=0.1236,T_E=259.15 K and x_(1E)=0.7831,T_E=286.15 K)and one congruent melting point(x_(1C)=0.4997,T_C=303.55 K)because of the generation of a congruently melting addition compound:2-P·H_2O.The ideal solubility and the UNIFAC models were applied to predict the SLE,while the Wilson and NRTL models were employed in correlating the experimental data.The best correlation of the SLE data has been obtained by the Wilson model for the binary system of NVP+2-P.The UNIFAC model gives more satisfactory predictions than the ideal solubility model. 展开更多
关键词 Phase equilibria Thermodynamics Model N-vinylpyrrolidone 2-pyrrolidone Water
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Heat of absorption of CO_2 in aqueous N,N-diethylethanolamine+ N-methyl-1,3-propanediamine solutions at 313 K 被引量:2
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作者 Katarzyna Sobala Hanna Kierzkowska-Pawlak 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2019年第3期628-633,共6页
Differential heat of absorption of CO_2 in aqueous solutions of N,N-diethylethanolamine(DEEA) and activated DEEA solutions up to a total concentration of 2 mol·L^(-1) was measured as a function of CO_2 loading at... Differential heat of absorption of CO_2 in aqueous solutions of N,N-diethylethanolamine(DEEA) and activated DEEA solutions up to a total concentration of 2 mol·L^(-1) was measured as a function of CO_2 loading at 313.15 K using a reaction calorimeter. In order to analyze the performance of N-methyl-1,3-propanediamine(MAPA)as an activator, DEEA blended solutions containing 0.05, 0.1 and 0.2 mol·L^(-1) MAPA were studied. The heat of CO_2 absorption in single DEEA solutions was unaffected by changing the DEEA concentration in the range of(0.5–2) mol·L^(-1). On the other hand, increasing the concentration of MAPA in aqueous amine mixtures of(DEEA + MAPA) raised the heat of absorption. 展开更多
关键词 CO2 CAPTURE Differential heat of absorption N N-diethylethanolamine n-methyl-1 3-propanediamine AMINE blends
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Framework-solvent interactional mechanism and effect of NMP/DMF on solvothermal synthesis of [Zn_4O(BDC)_3]_8 被引量:3
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作者 吴争平 王明雪 +4 位作者 周丽姣 尹周澜 谈进 张锦玲 陈启元 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2014年第11期3722-3731,共10页
In order to explore the effect mechanism of solvent on the synthesis of the metal organic framework materials, the microscopic interaction between solvent and framework and the effects of N,N-dimethyl-formamide(DMF) o... In order to explore the effect mechanism of solvent on the synthesis of the metal organic framework materials, the microscopic interaction between solvent and framework and the effects of N,N-dimethyl-formamide(DMF) or N-methyl- 2-pyrrolidone(NMP) on solvothermal synthesis of [Zn4O(BDC)3]8 were investigated through a combined DFT and experimental study. XRD and SEM showed that the absorbability of NMP in the pore of [Zn4O(BDC)3]8 was weaker than that of DMF. The thermal decomposition temperature of [Zn4O(BDC)3]8 synthesized in DMF was higher than that in NMP according to TG and FT-IR. In addition, the nitrogen sorption isotherms indicated that NMP improved gas sorption property of [Zn4O(BDC)3]8. The COSMO optimized calculations indicated that the total energy of Zn4O(BDC)3 in NMP was higher than that in DMF, and compared with non-solvent system, the charge of zinc atoms decreased and the charge value was the smallest in NMP. Furthermore, the interaction of DMF, NMP or DEF in [Zn4O(BDC)3]8 crystal model was calculated by DFT method. The results suggested that NMP should be easier to be removed from pore of materials than DMF from the point of view of energy state. It can be concluded that NMP was a favorable solvent to synthesize [Zn4O(BDC)3]8 and the microscopic mechanism was that the binding force between Zn4O(BDC)3 and NMP molecule was weaker than DMF. 展开更多
关键词 solvothermal synthesis [Zn4O(BDC)3]8 n-methyl-2-pyrrolidone interactional mechanism COSMO solvation model density functional method
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Ultrasonic-assisted Synthesis of Fe Nanoparticles in the Presence of Poly(N-vinyl-2-pyrrolidone) 被引量:8
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作者 Xu, Ying Zhang, Xiaoyan +1 位作者 Hsing, Yiming Fang, Yuzhi 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2011年第9期1829-1836,共8页
Zero-valent iron particles were prepared by wet reduction chemistry assisted with ultrasonic treatment. Such prepared particles have uniform size, exhibit crystalline structure and show strong pararnagnetic property. ... Zero-valent iron particles were prepared by wet reduction chemistry assisted with ultrasonic treatment. Such prepared particles have uniform size, exhibit crystalline structure and show strong pararnagnetic property. Their surface modification by coating poly(N-vinyl-2-pyrrolidone) (PVP) was investigated. The resulting Fe(0)-PVP particles were monodispersed and possessed enhancing magnetization saturation. Those synthesis conditions to control the particle size and distribution were exploited. 展开更多
关键词 nanoparticles magnetic properties ultrasonic-assisted wet reduction poly(N-vinyl-2-pyrrolidone
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High-performance PVDF-HFP based gel polymer electrolyte with a safe solvent in Li metal polymer battery 被引量:12
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作者 Jing Jie Yulong Liu +6 位作者 Lina Cong Bohao Zhang Wei Lu Xinming Zhang Jun Liu Haiming Xie Liqun Sun 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2020年第10期80-88,共9页
Poly(vinylidenefluoride-co-hexafluoropropylene)(PVDF-HFP)based gel polymer electrolytes are widely studied owing to their electrochemical stability and high dielectric constant.However,most gel polymer electrolytes sh... Poly(vinylidenefluoride-co-hexafluoropropylene)(PVDF-HFP)based gel polymer electrolytes are widely studied owing to their electrochemical stability and high dielectric constant.However,most gel polymer electrolytes show unsatisfied safety and interface compatibility due to excessive absorption of volatile and flammable liquid solvents.Herein,by using a safe solvent(N-methyl-2-pyrrolidone)with higher boiling(203℃)and flash points(95℃),we initiatively fabricate a flexible PVDF-HFP based gel polymer electrolyte.The obtained gel polymer electrolyte demonstrates a high ionic conductivity of 7.24×10^−4 S cm−1,an electrochemical window of 5.2 V,and a high lithium transference number of 0.57.As a result,the synthesized polymer electrolyte exhibits a capacity retention of 70%after 500 cycles at 0.5 C,and a discharge capacity of 86 mAh g−1 even at a high current rate of 10 C for LiFePO4 based Li metal batteries.Moreover,a stable Li plating/stripping for more than 500 h is achieved under 0.1 mAh at both room temperature and 70℃.Our results indicate that the PVDF-HFP polymer electrolyte is promising for manufacturing safe and high-performance Li metal polymer batteries. 展开更多
关键词 Gel polymer electrolyte n-methyl-2-pyrrolidone Interface stability Li-ion conduction path
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Controlled Synthesis of PCL/PVP Copolymer by RAFT Method and Its HydrophUic Block-Dependent MiceUar Behaviors
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作者 李蕤 庞文民 +1 位作者 朱清仁 聂康明 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2016年第3期358-364,I0002,共8页
A range of poly(ε-caprolactone)/poly(N-vinyl-2-pyrrolidone) amphiphilic block copolymers with well-defined hydrophilic chain length were synthesized by the living/controlled reversible addition fragmentation chai... A range of poly(ε-caprolactone)/poly(N-vinyl-2-pyrrolidone) amphiphilic block copolymers with well-defined hydrophilic chain length were synthesized by the living/controlled reversible addition fragmentation chain transfer polymerization method. The composition and struc- ture of the targeted resultants were characterized with 1H NMR, 13C NMR, FT-IR spec- troscopy and gel permeation chromatography. The various block copolymers were success- fully employed to fabricate the spherical micelle with core-shell morphological structure. The poly(N-vinyl-2-pyrrolidone) block-dependent characteristics of the copolymeric micelles were investigated by fluorescence spectroscopy, dynamic light scattering, and transmission electron microscopy. The solubilization of the hydrophobic ibuprofen as a model drug in the micelle solution was also explored. It was found that the drug loading contents are related to the micellar morphology structure determined by hydrophilic chain length in the copolymer. 展开更多
关键词 RAFT polymerization Poly(N-vinyl-2-pyrrolidone Core-shell structure Hydrophilic chain length Micellar behavior
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Physicochemical properties of β-cyclodextrin solutions and precipitates prepared from injectable vehicles 被引量:2
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作者 Saia Myo Thurein Nutdanai Lertsuphotvanit Thawatchai Phaechamud 《Asian Journal of Pharmaceutical Sciences》 SCIE CAS 2018年第5期438-449,共12页
β-Cyclodextrin( β-CyD) is cyclic oligosaccharide of a glucopyranose, containing a relatively hydrophobic central cavity and hydrophilic outer surface. However, the usefulness of β-CyD is limited owing to its low aq... β-Cyclodextrin( β-CyD) is cyclic oligosaccharide of a glucopyranose, containing a relatively hydrophobic central cavity and hydrophilic outer surface. However, the usefulness of β-CyD is limited owing to its low aqueous solubility whereas we found that its apparent high solubility was evident in some injectable solvents including 2-pyrrolidone(PYR), Nmethyl pyrrolidone(NMP) and dimethyl sulfoxide(DMSO). Therefore, in the present study, the physicochemical properties of the 30–60% w/w β-CyD in PYR, NMP and DMSO were investigated such as viscosity, water resistant, matrix formation rate and syringeability. The higher the concentration of β-CyD resulted in the increased viscosity and the higher force and energy of syringeability. β-CyD in PYR gave the highest viscosity which contributed to the lowest syringeability while β-CyD in DMSO exhibited the highest syringeability. The β-CyD in DMSO and NMP exhibited the higher rate of matrix formation. β-CyD in PYR showed the highest water resistant for phase separation while β-CyD in NMP gave the faster de-mixing rate compared to that from PYR. The difference in physicochemical properties of β-CyD dried ppts studied by scanning electron microscope(SEM), differential scanning calorimetry(DSC), X-ray diffraction(XRD), Fourier-transform infrared spectroscopy(FT-IR) and thermogravimetric analysis(TGA) revealed that there was partial complexation of β-CyD with respective solvents. Both solution and precipitate characteristic properties will be useful for using β-CyD in further investigation as matrix material dissolved in the injectable vehicles as the in situ forming gel for periodontitis treatment. 展开更多
关键词 β-CyD solution PRECIPITATES Dimethyl SULFOXIDE N-methyl PYRROLIDONE 2-pyrrolidone Matrix formation
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SYNTHESIS OF POLYMER-STABILIZED RUTHENIUM COLLOIDS BY LOW BOILING POINT ALCOHOL REDUCTION 被引量:2
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作者 刘汉范 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2003年第1期1-4,共4页
Stable and well-dispersed poly(N-vinyl-2-pyrrolidone) (PVP)-stabilized ruthenium colloidal clusters wereprepaxed via the reduction of ruthenium(III) chloride by refluxing with low boiling point alcohols. Investigation... Stable and well-dispersed poly(N-vinyl-2-pyrrolidone) (PVP)-stabilized ruthenium colloidal clusters wereprepaxed via the reduction of ruthenium(III) chloride by refluxing with low boiling point alcohols. Investigation of the size ofRu colloids by transmission electron microscopy (TEM) indicated that the average diametes could be controlled in the rangeof 1.2-1.6 nm with relative standard deviations of less than 0.33 by changing the molar ratio of PVP to Ru. The X-rayphotoelectron spectroscopy (XPS) characterization verified the formation of elemental ruthenium colloids. 展开更多
关键词 Polymer-stabilized colloid Poly(N-vinyl-2-pyrrolidone) RUTHENIUM Alcohol reduction
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Microwave-assisted synthesis of high aspect ratio ruthenium nanorods
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作者 Shu Ge Peng Xi Ping Gao +2 位作者 Yong Ke Guo Yu Qing Zhang Han Fan Liu 《Chinese Chemical Letters》 SCIE CAS CSCD 2010年第5期628-631,共4页
Poly(N-vinyl-2-pyrrolidone)(PVP)-stabilized ruthenium nanorods with high aspect ratio by refluxing ruthenium(Ⅲ) chloride in n-propanol have been successfully prepared by means of a facile and rapid microwave heating ... Poly(N-vinyl-2-pyrrolidone)(PVP)-stabilized ruthenium nanorods with high aspect ratio by refluxing ruthenium(Ⅲ) chloride in n-propanol have been successfully prepared by means of a facile and rapid microwave heating for the first time.The structure and morphology of the obtained products were characterized by transmission electron microscopy(TEM),select area electron diffraction(SAED),ultraviolet-visible spectrophotometry(UV-vis),X-ray photoelectron spectroscopy(XPS) and Fourier transform spectroscopy(FT-IR).XPS analysis reveals that the nanorods were in the metallic state.TEM images showed that ruthenium nanorods had an obvious one-dimensional structure with the aspect ratio ranged from 5 to 40 nm and length up to 600 nm.SAED patterns indicated that the nanorods were single-crystalline with a hexagonal structure. 展开更多
关键词 Poly(N-vinyl-2-pyrrolidone) RUTHENIUM NANORODS MICROWAVE
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山麻黄内生菌Myrothecium roridum LLY的化学成分及其体外细胞毒活性研究 被引量:5
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作者 申丽 王晶 +3 位作者 李玲玉 张小君 杨长水 宋勇春 《中草药》 CAS CSCD 北大核心 2015年第21期3155-3161,共7页
目的研究山麻黄Ephedra equisetina内生真菌Myrothecium roridum LLY固体发酵产物的化学成分,并进行体外细胞毒活性研究。方法采用硅胶柱、Sephadex LH-20凝胶柱色谱和高效液相色谱法进行分离纯化,利用高分辨质谱、核磁共振谱等方法鉴... 目的研究山麻黄Ephedra equisetina内生真菌Myrothecium roridum LLY固体发酵产物的化学成分,并进行体外细胞毒活性研究。方法采用硅胶柱、Sephadex LH-20凝胶柱色谱和高效液相色谱法进行分离纯化,利用高分辨质谱、核磁共振谱等方法鉴定化合物的结构。MTT法进行化合物体外细胞毒活性筛选,并采用流式细胞术和Western blotting法进行化合物细胞毒活性机制初步研究。结果从M.roridum LLY固体发酵产物中分离得到9个化合物,分别鉴定为吩嗪-1-羧酸(1)、1-甲氧基吩嗪(2)、N-methyl-1H-indole-2-carboxamaide(3)、甲基硫赭曲菌素(4)、ditryptophenaline(5)、7,8-二甲基异咯嗪(6)、deoxyleporin B(7)、尿嘧啶(8)和胸腺嘧啶(9)。MTT测定发现,化合物3对人肝癌细胞株SMMC-7721增殖具有一定的抑制活性,其IC50值为38.0μg/m L,阳性对照顺铂的IC_(50)值为11.5μg/m L。细胞周期分析发现,化合物3可导致SMMC-7721细胞S期阻滞;Western blotting分析发现,化合物3可使SMMC-7721细胞中细胞周期负调控蛋白p27的表达上调,并且Cleaved-PARP蛋白被明显活化。结论化合物7为1个新的天然产物。化合物3能诱导SMMC-7721细胞凋亡;其对SMMC-7721细胞的增殖抑制作用与S期细胞周期阻滞相关,并受到p27蛋白的调控。 展开更多
关键词 山麻黄 内生真菌 细胞毒活性 n-methyl-1H-indole-2-carboxamaide deoxyleporin B
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A novel family of green ionic liquids with surface activities 被引量:2
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作者 ZHANG HaiBo ZHOU XiaoHai +2 位作者 DONG JinFeng ZHANG GaoYong WANG CunXin 《Science China Chemistry》 SCIE EI CAS 2007年第2期238-242,共5页
Ionic liquids have many unique properties as a new and remarkable class of environmental benign solvents,which promises widespread applications in industry and other areas. However,the ionic liq-uids with surface acti... Ionic liquids have many unique properties as a new and remarkable class of environmental benign solvents,which promises widespread applications in industry and other areas. However,the ionic liq-uids with surface activity are rarely reported. In this work,a series of novel ionic liquids was synthe-sized by using N-methyl-2-pyrrolidone and alkyl bromide. The physical properties of this family of ionic liquids have been characterized,which shows that these compounds have ionic liquids characteristics,surface activity and biocompatibility. 展开更多
关键词 SURFACE activity IONIC liquids n-methyl-2-pyrrolidone BIOCOMPATIBILITY
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Synthesis and characterization of water-soluble magnetite nanocrystals via one-step sol-gel pathway 被引量:3
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作者 QI HongZhang YAN Biao +1 位作者 LI ChengKui LU Wei 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2011年第7期1239-1243,共5页
Water-soluble magnetite nanocrystals have been prepared by one-step non-alkoxide sol-gel method.The magnetic properties of magnetite nanocrystals obtained are size dependent.The experimental results also reveal that 2... Water-soluble magnetite nanocrystals have been prepared by one-step non-alkoxide sol-gel method.The magnetic properties of magnetite nanocrystals obtained are size dependent.The experimental results also reveal that 2-pyrrolidone not only serves as solvent,but also involves surface coordination which renders the magnetite nanoparticles water-soluble and colloidal solution stable.Although the current synthetic approach is a small modification to the non-alkoxide sol-gel method,it allows us to directly obtain high-quality water-soluble magnetic nanocrystals.In addition,we realize that this method could be easily extended to preparation of many other transition and main group metal oxide water-soluble nanocrystals only from simple metal ion salts. 展开更多
关键词 magnetite nanoparticles non-alkoxide sol-gel method 2-pyrrolidone
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