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TD-DFT Study on the Electronic Spectrum Properties of 2,7′-(Ethylene)-bis-8-hydroxyquinoline and Its Derivatives 被引量:1
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作者 李志锋 朱元成 +1 位作者 袁焜 康敬万 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2008年第1期63-69,共7页
The structures of 2,7'-(ethylene)-bis-8-hydroxyquinoline and its derivatives were optimized at the ground states using ab initio HF and B3LYP methods. At the same time, the molecular structures of the first singlet... The structures of 2,7'-(ethylene)-bis-8-hydroxyquinoline and its derivatives were optimized at the ground states using ab initio HF and B3LYP methods. At the same time, the molecular structures of the first singlet excited state for 2,7'-(ethylene)-bis-8-hydroxyqulnoline and its derivatives were optimized by CIS/6-31G(d). The absorption and emission spectra based on the above structures were obtained by the time-dependent density functional theory (TD-DFT) by the B3LYP method with the 6-31G(d) basis set. The calculated results of luminescence originate from the electronic transition from the hydroxphenol ring of 8-hydroxyquinoline A to the pyridine ring of 8-hydroxyquinoline B. Their luminescence wave bands can be tuned by different substituents on the ligand of 8-hydroxyquinoline. 展开更多
关键词 8-hydroxyquinolinolinato derivative electron spectrum excited state TD-DFT
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The adsorption and corrosion inhibition of 8-hydroxy-7-quinolinecarboxaldehyde derivatives on C-steel surface in hydrochloric acid 被引量:1
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作者 A.M.Eldesoky S.G.Nozha 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2017年第9期1256-1265,共10页
The protection influence of 8-hydroxy-7-quinolinecarboxaldehyde derivatives against C-steel corrosion was studied in 2 mol·L^(-1)HCl solutions at 30 °C. Measurements were conducted under various experimental... The protection influence of 8-hydroxy-7-quinolinecarboxaldehyde derivatives against C-steel corrosion was studied in 2 mol·L^(-1)HCl solutions at 30 °C. Measurements were conducted under various experimental conditions using weight loss, potentiodynamic polarization, electrochemical impedance spectroscopy(EIS) and electrochemical frequency modulation(EFM) techniques. These studies have shown that 8-hydroxy-7-quinolinecarboxaldehyde derivatives are very good "green", mixed-type inhibitors. Corrosion rates obtained from both EFM and EIS methods are comparable with those recorded using Tafel extrapolation method, confirming validation of corrosion rates measured by the latter. The inhibitive action of these 8-hydroxy-7-quinolinecarboxaldehyde derivatives was discussed in terms of blocking the electrode surface by adsorption of the molecules through the active centers contained in their structures following Langmuir adsorption isotherm. Quantum chemical method was also employed to explore the relationship between the inhibitor molecular properties and its protection efficiency. 展开更多
关键词 8-Hydroxy-7-quinolinecarboxaldehyde derivativeS C-steel HCL EFM
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ZIF-8衍生多孔碳在电容去离子处理重金属废水中的应用
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作者 刘悦 万学立 +1 位作者 张弛 包申旭 《水处理技术》 CAS CSCD 北大核心 2024年第9期59-64,共6页
电容去离子技术(CDI)作为一种新兴的环保节能脱盐技术,目前已逐步应用于处理重金属废水,其电极材料多为各种碳基材料制备,且CDI的电吸附效率与材料的特性有直接关系。本研究先采用2-甲基咪唑锌盐(ZIF-8)在N_(2)气氛下碳化得到的ZIF-8衍... 电容去离子技术(CDI)作为一种新兴的环保节能脱盐技术,目前已逐步应用于处理重金属废水,其电极材料多为各种碳基材料制备,且CDI的电吸附效率与材料的特性有直接关系。本研究先采用2-甲基咪唑锌盐(ZIF-8)在N_(2)气氛下碳化得到的ZIF-8衍生多孔碳(ZDPC),然后与活性炭(AC)制备ZDPC/AC复合电极,并将该电极应用于吸附重金属废水中的Cr(Ⅵ)和Cu(Ⅱ)。采用单因素实验研究了吸附效果受电极电压、溶液初始浓度和初始pH等关键因素的影响,并确定了最佳吸附条件。论文结果表明,重金属离子在ZDPC/AC复合电极上的吸附以物理吸附和单分子层吸附为主,并具有优良的电化学吸附性能。该电极在重金属污染废水净化方面有着广阔的实际应用前景。 展开更多
关键词 电容去离子 ZIF-8衍生多孔碳 重金属废水 Cr(Ⅵ) Cu(Ⅱ)
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Enzymatic Synthesis of a CCK-8 Tripeptide Derivative
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作者 Li GUO +3 位作者 Zi Min LU 《Chinese Chemical Letters》 SCIE CAS CSCD 2003年第2期167-168,共2页
The enzymatic synthesis of CCK-8 tripeptide derivative Phac-Met-Asp(OMe)-Phe-NH2 is reported. Starting with Phac-Met-OCam, we have successfully synthesized the target tripeptide with three free or immobilized enzymes... The enzymatic synthesis of CCK-8 tripeptide derivative Phac-Met-Asp(OMe)-Phe-NH2 is reported. Starting with Phac-Met-OCam, we have successfully synthesized the target tripeptide with three free or immobilized enzymes, ?chymotrypsin, papain and thermolysin in reasonable yields. The key steps in this synthesis were the coupling of Phac-Met-OCam and H-Asp(OMe)2 to form Met-Asp peptide bond catalyzed by ?chymotrypsin and the selective hydrolysis of -ester of Phac-Met-Asp(OMe)2 catalyzed by papain. 展开更多
关键词 Enzymatic synthesis CCK-8 tripeptide derivative.
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Synthesis and Crystal Structure of a Novel Calix[8]arene Ester Derivative
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作者 DaQiangYUAN RuJiWANG 《Chinese Chemical Letters》 SCIE CAS CSCD 2002年第1期37-40,共4页
The synthesis and crystal structure of a novel calix[8]arene ester are reported herein. The calix[8]arene ester derivative has been characterized by IR, NMR and X-ray crystal analysis. The X-ray structure analysis r... The synthesis and crystal structure of a novel calix[8]arene ester are reported herein. The calix[8]arene ester derivative has been characterized by IR, NMR and X-ray crystal analysis. The X-ray structure analysis revealed that the 8 phenolic hydroxy groups of the calix[8]arene have been substituted by 4 diethyl dibromomalonate molecules with each two adjacent hydroxy oxygen atoms attached to a bridge diethyl malonate. 展开更多
关键词 SYNTHESIS crystal structure arene ester derivative.
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Theoretical Study on Electronic and Charge Transfer Properties of Oligo[8]thiophene and Its Circular,Hooped,and Helical Derivatives
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作者 唐珊珊 刘俊渤 +1 位作者 陈光 靳瑞发 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2014年第1期104-114,共11页
The novel linear, circular, hooped, and helical molecules based on oligo[8]thio- phene were theoretically studied for the applications of charge transfer devices. To investigate the influence of topology for oligo[8]t... The novel linear, circular, hooped, and helical molecules based on oligo[8]thio- phene were theoretically studied for the applications of charge transfer devices. To investigate the influence of topology for oligo[8]thiophene derivatives, the geometry structures, frontier molecular orbital (FMO) energies, charge transport properties, and stability property were predicted by density functional theory methods. The calculated results reported herein show that the oligo[8]thiophene derivative with linear structure has smaller energy gap, and fused oligo[8]thiophene derivative with circular structure has the smallest reorganization energy among the designed molecules. We have also studied the stability properties of the designed molecules, and oligo[8]thiophene derivatives are more stable tharJ the fused oligo[8]thiophene derivatives. 展开更多
关键词 thiophene derivatives electronic property charge transport property stability property.. topology
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A CONVENIENT SYNTHESIS OF 8-ALKYL S'-ALKYL (ARYL) DITHIOPHOSPHORIC ACID DERIVATIVES
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作者 Chu Chi TANG Gui Ping WU 《Chinese Chemical Letters》 SCIE CAS CSCD 1992年第10期783-784,共2页
The chlorination of S-alkyl(aryl) 0,0-dialkyl dithiophosphates with phosphorus oxychloride proceeds with isomerization to give S-alkyl S'-alkyl(aryl) dithiophosphorochtoridates, which react further with various nu... The chlorination of S-alkyl(aryl) 0,0-dialkyl dithiophosphates with phosphorus oxychloride proceeds with isomerization to give S-alkyl S'-alkyl(aryl) dithiophosphorochtoridates, which react further with various nucleophiles in the presence of base to give the title compounds 展开更多
关键词 ACID ARYL DITHIOPHOSPHORIC ACID derivativeS A CONVENIENT SYNTHESIS OF 8-ALKYL S ALKYL
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Theoretical Study on the Electronic Structures and Spectral Properties of 1,8-Naphthalimide Derivatives
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作者 王艳 高慧 +2 位作者 杨平 聂光华 宋新建 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2014年第6期813-820,共8页
The molecular geometries, frontier molecular orbital properties, and absorption and emission properties of three 4-phenoxy-1,8-naphthalimide derivatives, namely 4-phenoxy-N-(2-hydroxyethyl)-1,8-naphthalimide(1),4-... The molecular geometries, frontier molecular orbital properties, and absorption and emission properties of three 4-phenoxy-1,8-naphthalimide derivatives, namely 4-phenoxy-N-(2-hydroxyethyl)-1,8-naphthalimide(1),4-(2-tert-butylphenoxy)-N-(2-hydroxyethyl)-1,8-naphthalimide(2), and 4-[2,4-di(tert-butyl)]phenoxy-N-(2-hydroxyethyl)-1,8-naphthalimide(3), are investigated by density functional theory(DFT) and time-dependent density functional theory(TD-DFT) calculations in conjunction with polarizable continuum models(PCMs). Four functionals and ten basis sets are employed for 1 to calculate the electron transition energies, which were compared with the experimental observations. Our results reveal that the B3LYP/6-311+G(d,p) method is the best choice to reproduce the experimental spectra. Moreover, the effects of substituents on the molecular geometries, electronic structures, absorption and emission spectra are also studied at the B3LYP/6-311+G(d,p) level. We find that the gap between the highest occupied molecular orbital(HOMO) and the lowest unoccupied molecular orbital(LUMO) decreases with increasing the number of tert-butyl substituents onto the phenoxy groups, suggesting red-shift of the absorption and emission bands. This is related to the increase of conjugation from 1 to 2 and 3. Our calculations are in good agreement with the experimental results. 展开更多
关键词 1 8-naphthalimide derivatives density functional theory frontier molecular orbital absorption spectrum emission spectrum
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Thickness Dependent Behavior of Photoluminescence of Tris(8-hydroxyquinoline)Aluminum Film 被引量:1
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作者 徐以锋 张寒洁 +3 位作者 陈桥 李海洋 鲍世宁 何丕模 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 北大核心 2006年第2期152-154,共3页
In situ thickness dependent photoluminescence (PL) measurements of tris(8-hydroxyquinoline) aluminum(Alq3) film were performed. At the beginning of Alq3 deposition on the glass substrate, the Alq3 emission showe... In situ thickness dependent photoluminescence (PL) measurements of tris(8-hydroxyquinoline) aluminum(Alq3) film were performed. At the beginning of Alq3 deposition on the glass substrate, the Alq3 emission showed a sharp red-shift. Further deposition of Alq3 resulted slight red-shift, and finally tended to saturated value. The total red-shift of about 12 nm was observed for the Alq3 film thickness range from 2 to 500 nm.This red-shift was attributed to the change from the 2D to 3D exciton state with increasing Alq3 film thickness. Meanwhile, the PL intensity of Alq3 emission increased continuously, and showed a rate change at the initial deposition of Alq3 due to non-rediative decay of excitons arised from the interaction between excitons and the substrate, and finally tended to saturation with the Alq3 thickness. 展开更多
关键词 Tris(8-hydroxyquinoline) aluminum film PHOTOLUMINESCENCE RED-SHIFT
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8-羟基喹啉衍生物作为潜在的艰难梭菌抗生素的设计、合成和活性评价
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作者 叶腾飞 程涛 +2 位作者 宋平 计伟莉 卞晓岚 《药学实践与服务》 CAS 2023年第12期737-740,共4页
目的 艰难梭菌感染(CDI)目前治疗措施主要包括抗生素疗法、粪菌移植疗法等,其治疗后存在较高的复发率,需寻求一种更有效的替代疗法。方法 本研究基于有前景的8-羟基喹啉骨架,设计、合成了一系列8-羟基喹啉衍生物。结果 针对艰难梭菌的... 目的 艰难梭菌感染(CDI)目前治疗措施主要包括抗生素疗法、粪菌移植疗法等,其治疗后存在较高的复发率,需寻求一种更有效的替代疗法。方法 本研究基于有前景的8-羟基喹啉骨架,设计、合成了一系列8-羟基喹啉衍生物。结果 针对艰难梭菌的活性测试表明,多数分子对艰难梭菌具有良好的抑菌作用,其中化合物6f显示出较强的杀伤艰难梭菌活性。结论 本研究发现了新型具有抗艰难梭菌的8-羟基喹啉衍生物,可作为良好的先导化合物进一步研发。 展开更多
关键词 艰难梭菌 抗感染 8-羟基喹啉衍生物 构效关系
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Thermochemical Study on Coordination Complex of Samarium with Salicylic Acid and 8-Hydroxyquinoline 被引量:2
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作者 魏得良 李强国 +5 位作者 黄熠 李旭 叶丽娟 肖圣雄 杨德俊 刘义 《Journal of Rare Earths》 SCIE EI CAS CSCD 2007年第2期253-256,共4页
The coordination complex Sm(C7H5O2)2·(C9H6NO), synthesized from the reaction of samarium chloride sixhydrate with salicylic acid and 8-hydroxyquinoline, was characterized with IR, elemental analysis, molar co... The coordination complex Sm(C7H5O2)2·(C9H6NO), synthesized from the reaction of samarium chloride sixhydrate with salicylic acid and 8-hydroxyquinoline, was characterized with IR, elemental analysis, molar conductance, and thermogravimatric analysis. The standard molar enthalpies of solution of [ SmCl3·6H2O (s) ], [ 2C7H6O3 (s) ], [ C9H7NO ( s ) ] and [ Sm (C7H5O3) 2·( C9H6NO ) ( s ) ] in the calorimetric solvent were determined with the solution-reaction isoperibol calorimeter at 298.15 K to be △sHm^- [ SmCl3·6H2O (s), 298.15 K ] = - 103.98 ± 0.04 kJ·mol^-1, △sHm^- [2 C7H6O3 (s), 298.15 K] = 16.35±0.14 kJ·mol^-1,△sHm^-[C9H7NO (s), 298.15 K] = -6.11±0.08 kJ·mol^-1 and △sHm^-[Sm(C7H5O3)2·(C9H6NO) (s), 298.15 K] = - 130.08 ± 0.04 kJ·mol^-1, respectively. The enthalpy was determined to be △rHm^- = 89.59 ±0.18 kJ·mol^-1 for the reaction SmCl3·6H2O(s) + 2C7H6O3(s) + C9H7NO(s) = Sm (C7H5O3) 2·(C9H6NO) ( s ) + 3HCl (g) + 6H2O ( l ). According to the above results and the data given in literature and through Hess' law, the standard molar enthalpy of formation of Sin( C7H5O3 )2·(C9H7NO)(s) was estimated to be △rHm^- [ Sm (C7H5O3)2·(C9H6NO) (s), 298.15 K] = - 2055.9 ± 3.03 kJ·mol^-1. 展开更多
关键词 samarium complex salicylic acid 8-hydroxyquinolinE standard molar enthalpies of formation rare earths
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Preparation and Characterization of Carboxyl Functionalized Fluorescent Mesoporous Silica Nanoparticles Containing 8-Hydroxyquinolinate Zinc Complexes 被引量:1
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作者 WANG Wanxia LIU Mingxing 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2019年第4期973-978,共6页
Fluorescent mesoporous silica nanoparticles functionalized with carboxyl group(Znq-CMSCOOH) were successfully synthesized by in situ formation route of 8-hydroxyquinolinate zinc complexes in channels of mesoporous sil... Fluorescent mesoporous silica nanoparticles functionalized with carboxyl group(Znq-CMSCOOH) were successfully synthesized by in situ formation route of 8-hydroxyquinolinate zinc complexes in channels of mesoporous silica nanoparticles and post-grafting of carboxyl group on the surface. Moreover,the particle size and structural properties of Znq-CMS-COOH were characterized by transmission electron microscopy(TEM),field emission scanning electron microscopy(FE-SEM),dynamic light scattering(DLS),Fourier transform infrared spectroscopy(FT-IR),UV-vis spectrometer, fluorescence spectrometer and nitrogen adsorption-desorption measurements. The obtained results suggest that the Znq-CMS-COOH presents the uniform spherical shape with the mean diameter of about 85 nm and the obvious wormhole arrangement mesoporous. In addition, the Znq-CMS-COOH possesses green fluorescence with the emission peaks at 495 nm. So the Znq-CMS-COOH, which is beneficial to further modification and tracing, might be a great potential carrier for applying in drug delivery system in the future. 展开更多
关键词 MESOPOROUS silica nanoparticles 8-hydroxyquinolinate zinc COMPLEXES FLUORESCENT CARBOXYL FUNCTIONALIZATION synthesis
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Crystal Structure and Characterization of a Binuclear Cd(Ⅱ) Quaternary Coordination Complex [Cd_2(phen)_2Q_2(BP)]_n(phen=1,10-Phenanthroline,BP = Biphenyl-4,4'-dicarboxylic acid,Q=8-Hydroxyquinoline Anion) 被引量:1
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作者 王家军 崔运成 +3 位作者 高广刚 王仁章 刘博 王小美 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2008年第9期1149-1152,共4页
The structure of a binuclear cadmium(Ⅱ) quaternary complex, [Cd2(phen)2- Q2(BP)]n 1 (phen = 1,10-phenanthroline, BP = biphenyl-4,4′-dicarboxylic acid, Q = 8-hydroxy- quinoline-anion), has been determined by ... The structure of a binuclear cadmium(Ⅱ) quaternary complex, [Cd2(phen)2- Q2(BP)]n 1 (phen = 1,10-phenanthroline, BP = biphenyl-4,4′-dicarboxylic acid, Q = 8-hydroxy- quinoline-anion), has been determined by X-ray crystallography and characterized by elemental analysis, IR spectrum and thermogravimetric analysis. It crystallizes in the monoclinic system, space group P21/n with a = 13.1906(18), b = 10.9623(15), c = 16.947(2)A, β = 111.3430(10)°, V = 2282.5(5)A^3, Z = 4, Mr = 556.85, Dc = 1.620 g/cm^3, F(000) = 1116,μ= 0.994 mm^-1 and S = 1.056. In the structure, 1D chains are connected via biphenyl-4,4′-dicarboxylic acid, 8-hydroxy quinoline anion and binuclear cadmium atoms into an infinite 1-D molecular chain architecture. Via aryl ring π-π stacking interactions a supramolecular structure is formed in 1. 展开更多
关键词 PHEN 8-hydroxyquinolinE cadmium(Ⅱ) complex single-crystal structure TG
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Synergistic extraction of praseodymium with 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester and 8-Hydroxyquinoline 被引量:1
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作者 张倩 乌东北 包伯荣 《Journal of Shanghai University(English Edition)》 CAS 2009年第1期72-75,共4页
The synergistic extraction of Pr^3+ from hydrochloric medium using mixture of 2-ethylhexyl phosphonic acid mono- 2-ethylhexyl ester (P507, HL) and 8-Hydroxyquinoline (HQ) in heptane was investigated. The effect o... The synergistic extraction of Pr^3+ from hydrochloric medium using mixture of 2-ethylhexyl phosphonic acid mono- 2-ethylhexyl ester (P507, HL) and 8-Hydroxyquinoline (HQ) in heptane was investigated. The effect of equilibrium of aqueous acidity on extraction of Pr^3+ was discussed. The effect of extractant concentraction, different diluents, equilibrium time and acetate ion concentration oil extraction reaction were also studied. With a method of double-logarithmic slope, composition of the extracted species on 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester and 8-Hydroxyquinoline was derived. The result shows that the synergistic extraction system not only overcomes emulsification of 8-Hydroxyquinoline, but also shows perfect capacity of synergistic extraction. The largest synergistic enhancement factor can be calculated to be 5.49 at pH 3.6 for Pr^3+. 展开更多
关键词 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester 8-hydroxyquinoline (HQ) synergistic extraction praseodymium
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Effect of caffeic acid derivatives on polychlorinated biphenyls induced hepatotoxicity in male mice 被引量:1
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作者 Ruirui Li Shuyuan Cao +5 位作者 Jinfeng Dai Li Wang Lei Li Yubang Wang Wenqin Yin Yuting Ye 《The Journal of Biomedical Research》 CAS 2014年第5期423-428,共6页
Chronic exposure to coplanar polychlorinated biphenyls(PCBs),a potent inducer of toxic reactive oxygen species(ROS),in the environment and food can cause liver diseases.It remains unknown whether caffeic acid deri... Chronic exposure to coplanar polychlorinated biphenyls(PCBs),a potent inducer of toxic reactive oxygen species(ROS),in the environment and food can cause liver diseases.It remains unknown whether caffeic acid derivatives(CADs) exerted protective effect on PCB-induced hepatotoxicity.We sought to evaluate the activities of 3CADs on PCB169-induced oxidative stress and DNA damage in the liver.Male ICR mice were administered with1 μmol/mL PCB169 at 5 mL/kg body weight for 2 weeks.The mice were given CADs by gastric gavage for 3weeks.We found that PCB169 decreased the growth rate and reduced the levels of superoxide dismutase(SOD),glutathione(GSH) and GSH peroxidase(GPx).It increased the liver weight,malondialdehyde(MDA)and 8-hydroxy-2'-deoxyguanosine(8-OHdG) levels and CYPlAl activity in the liver tissues and plasma of mice(P〈0.05).Pretreatment of mice with CADs restored the above parameters to normal levels.There was a synergistic protective effect between CADs in preventing MDA and 8-OHdG formation and inducing CYPlAl and phase II metabolism enzyme(SOD,GPx) activities(P〈0.05).In conclusion,PCB169 induced hepatotoxicity and pretreatment with CADs had synergistic protective effects on liver damage. 展开更多
关键词 caffeic acid derivatives(CADs) PCB169 8-OHdG synergy hepatotoxicity
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Expression of Pigment Epithelium-derived Factor in Bladder Tumour Is Correlated with Interleukin-8 yet Not with Interleukin-1α 被引量:3
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作者 冯陈陈 关明 +5 位作者 丁强 张元芳 姜昊文 温晖 王保勋 吴忠 《Journal of Huazhong University of Science and Technology(Medical Sciences)》 SCIE CAS 2011年第1期21-25,共5页
Pigment epithelium-derived factor (PEDF) is an antiangiogenic factor which is effective in tumour inhibition in a variety of tumours and has not yet been studied in bladder tumour before. In this study the expressio... Pigment epithelium-derived factor (PEDF) is an antiangiogenic factor which is effective in tumour inhibition in a variety of tumours and has not yet been studied in bladder tumour before. In this study the expression of PEDF, interleukin-1α (IL-1α) and -8 (IL-8) in bladder tumours was investigated. Immunohistochemistry was performed on 64 bladder tumour and 23 normal uroepithelium samples. Expression change of the factors was compared with clinicopathological parameters. Correlations between PEDF, IL-1α and IL-8 were analyzed. None of the factors was in relation to gender, tumour occurrence, and size or onset pattern. PEDF (P=0.014) and IL-1α (P=0.049) expression was down-regulated with grade progression. PEDF expression was lower in normal uroepithelium than in papillary urothelial neoplasm of low malignant potential (PUNLMP) (P=0.000) and carcinoma (P=0.009) whilst IL-1α (P=0.000 and P=0.000 respectively) and IL-8 (P=0.000 and P=0.023 respectively) expression was higher in the same grouping. PEDF expression had a negative correlation with IL-8 in PUNLMP (P=0.049, r=-0.578) as well as in tumour grouping (P=0.033, r=-0.276). Deranged expressional change of PEDF, IL-1α and IL-8 could be in relation to loss of differentiation from normal uroepithelium to papillary lesion and eventually to carcinoma. 展开更多
关键词 ANGIOGENESIS bladder tumour INTERLEUKIN-1Α INTERLEUKIN-8 pigment epithelium-derived factor
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Bipolar resistive switching based on bis(8-hydroxyquinoline) cadmium complex:Mechanism and non-volatile memory application
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作者 王颖 杨汀 +3 位作者 谢吉鹏 吕文理 范国莹 刘肃 《Chinese Physics B》 SCIE EI CAS CSCD 2013年第7期467-472,共6页
Stable and persistent bipolar resistive switching was observed in an organic diode with the structure of indium-tin oxide (ITO)/bis(8-hydroxyquinoline) cadmium (Cdq2)/Al. Aggregate formation and electric field d... Stable and persistent bipolar resistive switching was observed in an organic diode with the structure of indium-tin oxide (ITO)/bis(8-hydroxyquinoline) cadmium (Cdq2)/Al. Aggregate formation and electric field driven trapping and detrapping of charge carriers in the aggregate states that lie in the energy gap of the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) of the organic molecule were proposed as the mechanism of the observed bipolar resistive switching, and this was solidly supported by the results of AFM investigations. Repeatedly set, read, and reset measurements demonstrated that the device is potentially applicable in non-volatile memories. 展开更多
关键词 resistive switching MEMORY AGGREGATION bis(8-hydroxyquinoline) cadmium
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A Hydrogen Bond Stabilized 3D Network Built from Pyrazine-2,3,5,6-tetracarboxylic Acid and 8-Hydroxyquinoline
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作者 徐峰 魏振宏 +2 位作者 黄祥雷 梅应轩 蔡琥 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2015年第12期1845-1850,共6页
8-Hydroxyquinoline salt of pyrazine-2,3,5,6-tetracarboxylic acid [HQ]2[H2pztc]· 2H2O (1) was prepared and characterized by single-crystal X-ray diffraction, NMR, IR, TGA, elemental analysis and fluorescent meas... 8-Hydroxyquinoline salt of pyrazine-2,3,5,6-tetracarboxylic acid [HQ]2[H2pztc]· 2H2O (1) was prepared and characterized by single-crystal X-ray diffraction, NMR, IR, TGA, elemental analysis and fluorescent measurements. Compound 1 crystallizes in orthorhombic, space group Pbcn with a = 9.953(3), b = 15.966(3), c = 16.081(5) A, V = 2555.5(13) A3, Z = 4, μ = 0.122 mm^-1, Dc = 1.514 Mg/m3, T= 296(2) K, C26H22N4O12, Mr = 582.48, F(000) = 1208, S = 1.006, R = 0.0448 and wR = 0.1149. Compound 1 has a three-dimensional (3D) network, in which pyra- zine-2,3,5,6-tetracarboxylic acids build up two-dimensional (2D) sheets and 8-hydroxyquinoline cations and water molecules act as pillars to connect the 2D sheets into an extended 3D network through strong intermolecular hydrogen bonding and π…π stacking interactions. Especially, a very short O-H…O hydrogen bond (O…O 2.470(2) A) between two neighboring [H2pztc] anions was observed. 展开更多
关键词 pyrazine-2 3 5 6-tetracarboxylic acid 8-hydroxyquinolinE hydrogen bond
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Theoretical Studies on the Ground State and Excited State of 2,7′- (Ethylene)-bis-8-hydroxyquinoline
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作者 Hui-xue Li Su-juan Pan +1 位作者 Xiao-feng Wang Tai Xiao 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 北大核心 2008年第3期263-269,共7页
2,7′-(Ethylene)-bis-8-hydroxyquinoline was optimized with DFT/B3LYP and ab initio HF methods, so ion- ization potential and electron affinity could be determined. Absorption spectrum was calculated by ZINDO and TD-... 2,7′-(Ethylene)-bis-8-hydroxyquinoline was optimized with DFT/B3LYP and ab initio HF methods, so ion- ization potential and electron affinity could be determined. Absorption spectrum was calculated by ZINDO and TD-DFT. CIS method was used to calculate the S1 excited states of the compound and afterwards the emission spectrum was computed. When the solvent effect was taken into account, the computed results show encouraging agreement with known experimental data. The results of analyzing the relationship between the energies and absorption spectra indicate that the ability to transporting electrons is strengthened compared with 8-hydroxyquinoline and that absorption and emission spectra are red-shifted. The intramoleeular reor- ganization energy of tris(2,7′-(ethylene)-bis-8-hydroxyquinoline)-aluminum implies its electron transporting property is worse than tris(8-hydroxyquinoline)-aluminum. The predicted maximum emission wavelength is red-shifted compared with tris(8-hydroxyquinoline)-aluminum. 展开更多
关键词 2 7′(Ethylene)-bis-8-hydroxyquinoline Absorption spectrum Emission spectrum Densityfunctional theory
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Synthesis and Structural Characterization of [Co(Q)_2(H_2O)_2](Q=8-Hydroxyquinoline Ion)
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作者 胡长文 王春秀 +3 位作者 李晖 牛学丽 潘万龙 龚云 《Journal of Beijing Institute of Technology》 EI CAS 2006年第2期221-224,共4页
The single crystal of bi(8-hydroxyquinoline) bihydrated cobalt (Ⅱ) complex, [ Co(Q)2 (H2O2 ] (Q = 8-hydroxyquinoline ion), has been synthesized by general method and structurally characterized by single crys... The single crystal of bi(8-hydroxyquinoline) bihydrated cobalt (Ⅱ) complex, [ Co(Q)2 (H2O2 ] (Q = 8-hydroxyquinoline ion), has been synthesized by general method and structurally characterized by single crystal X-ray diffraction. Crystal data: C18H16CoN2O4, monoclinic, C2/c, α = 1.336 2(4) nm, b = 0.941 2(3) nm, c = 1.354 3(4) nm, β= 109.672(4)°, Z = 4. In the complex, Co( Ⅱ ) ion is six-coordinated, forming a distorted octahedron. H-bonding and π-π stacking interaction play a significant role to form and stabilize the three-dimensional structure. 展开更多
关键词 crystal structure π-π stacking hydrogen bonding Co( complex 8-hydroxyquinolinE
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