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国家自然科学基金(20471020)

作品数:8 被引量:70H指数:3
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8 条 记 录,以下是 1-10
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8-羟基喹啉衍生物密度泛函理论的研究被引量:3
2008年
运用量子化学中的密度泛函理论(TD-DFT)法,在B3LYP/6-31G(d,p)水平上,理论计算两种新型的8-羟基喹啉衍生物,5-[(4-E-苯乙烯基)-苯甲亚胺基]-8-羟基喹啉(1)和5-[(4-溴-2-氟)苯甲亚胺基]-8-羟基喹啉(2)。探讨化合物(1)和(2)的几何构型、电子结构、前线分子轨道和电子光谱性质。结果表明由于引入取代基使体系的HOMO与LUMO之间的能隙降低,增强了与金属铝配位的能力;电子吸收光谱与实验数据基本吻合。
谢彦曾和平姚海波
关键词:8-羟基喹啉衍生物前线分子轨道电子吸收光谱
Photophysical, Photochemical Characterization and Design Synthesis of the Fulleropyrrolidines Containing Triphenyl Amine Dyads
<正>The synthesis of several donor-bridge-fullerene (acceptor) systems has been reported, but in only a few cas...
WANG, Ting-Ting ZENG, He-Ping (College of Chemistry and Environment, South China Normal University, Guangzhou 510631)
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乙烯基桥联的8-羟基喹啉衍生物的合成、抗氧化活性及促进鼠骨髓间质干细胞增殖的研究被引量:1
2010年
设计合成了2-乙烯基取代的8-羟基喹啉衍生物(6),用IR,UV-Vis,1H NMR,MS和元素分析确认其结构;利用二苯代苦味酰基自由基(DPPH.)法和噻唑蓝比色(MTT)法分别测定了目标产物的抗氧化活性及调控鼠骨髓间质干细胞(MSCs)增殖的作用.结果表明,目标产物有较强的抗氧化活性,随着产物浓度的增加,其抗氧化活性先增强后减弱;在低浓度时对鼠骨髓间质干细胞有促进作用.研究发现,化合物6抗氧化活性的提高与其含量相关.
张培全曾和平
关键词:8-羟基喹啉衍生物抗氧化活性骨髓间质干细胞
Synthesis, Characterization and Theoretical Calculation of the Fulleropyrrolidines Containing Triphenylamine
2006年
N-Methyl-2-(4-N,N-diphenylaminophenyl)fulleropyrrolidine and N-methyl-2-(4-di-p-tolylaminophenyl)fulleropyrrolidine were synthesized via the 1,3-dipolar cycloaddition reactions under microwave irradiation. The molecular structures were identified and characterized by MS, UV-Vis, FT-IR, ^1H NMR and fluorescence spectra. Photoinduced intramolecular electron transfer process from C60 moiety to triphenylamine moiety have been studied by nanosecond laser flash photolysis. The optimized structure and the distribution of the frontier molecular orbitals for C60-TPA were obtained by using DFT method at B3LYP/6-31G(d) level. The results indicated that the intramolecular photoinduced electron transfer could occur in these compounds, which were in excellent agreement with the nanosecond transient absorption spectra observed experimentally in polar solvent. The electronic spectrum of the compound C60-TPA was studied by ZINDO method on the basis of the optimized geometrics, which was essentially consistent with experimental values.
王婷婷曾和平
关键词:FULLEROPYRROLIDINE
Synthesis and properties investigation on Zn metal complex based on 8-hydroxyquinoline derivatives
Since Tang et al first used 8-hydroxyquinoline aluminium(Alq)complex as an emissive and electron transport mat...
WEI Jie-ping ZENG He-ping~* (South China Normal University,Guangzhou 510631,China
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Combined Transient Spectra and Semiempirical Calculation of [60]Fullerenes Attached with Piperidinodithiocarboxylate and 7-Chloro-phenazine
2005年
[60]Fullerenes attached with piperidinodithiocarboxylate dyad (1) and 7-chloro-1,2,3,4-tetrahydrophenazine (2) were efficiently synthesized through Diels-Atder cycloaddition with dienes. The physical properties of the triplet states of these compounds, in which strong electron acceptor moieties were covalently attached to C60 cores, were investigated by nanosecond laser flash photolysis. The excited triplet states in benzonitrite have been evaluated by observing the transient absorption bands in the near-IR region. The HOMO and LUMO were calculated by semiempirical methods AM1, which could predict the intramolecular photoinduced electron transfer in 1 and 2, and the nanosecond transient absorption spectra observed experimentally in solution were in excellent agreement with the calculated ones.
曾和平杨艳丽文丽君
关键词:FULLERENE
基于N-乙基咔唑-2-乙烯基-8-羟基喹啉锌的黄绿色有机电致发光器件的性能被引量:9
2009年
通过用一种既具有空穴传输特性又具有发光特性的新型荧光染料N-乙基咔唑-2-乙烯基-8-羟基喹啉锌((E)-2-(2-(9-ethyl-9H-carbazol-3-yl)vinyl)quinolato-zinc,CzHQZn)作为受主,制备了结构为ITO/2T-NATA(30nm)/CBP:6%Ir(ppy)3∶wCzHQZn(20nm)/Alq3(50nm)/LiF/Al(ITO:indium-tinoxide,2T-NATA:4,4′,4′′-{N,N-(2-naphthyl)-N-phenylamino}-triphenylamine,CBP:4,4-N,N′-dicarbazole-biphenyl,Ir(ppy)3:factris(2-phenylpyridine)iridium,Alq3:tris(8-quinolinolato)aluminum;w是CzHQZn的质量分数)的黄绿色有机电致发光器件(OLEDs).研究了掺杂体系在不同掺杂浓度(w=5%、10%、12%、15%)时的电致发光(EL)特性.结果表明,CzHQZn掺杂浓度为10%的器件在11V电压下实现了黄绿光发射,色坐标为(0.4045,0.5113),最大发光亮度为16110cd·m-2;而在7V电压下的最大发光效率为2.19cd·A-1,最大外量子效率为0.775%.
丁桂英姜文龙常喜华杰韩强欧阳新华曾和平
关键词:有机电致发光器件外量子效率
Investigation of the volatile Chemical Constituents in SI-WU Decoction by GC-MS
Si-wu decoction is one of the famous tonic Chinese prescriptions, it comprised of four herbs, viz. Rhizoma chu...
Chen Wei Zeng He-ping* ( Institution of Functional Molecular, South China University of Technology Guangzhou 510641)
关键词:GC-MSSEPARATION
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促进干细胞增殖的龟版浸膏气相色谱-质谱指纹图谱分析与应用被引量:1
2008年
目的运用生物活性指纹图谱预测其它中药能否促进骨髓间充质干细胞(bone marrow mesenchymal stem cells,bMMSCs)。方法龟版浸膏依次用石油醚、乙醚、二氯甲烷提取,得到溶剂提取物,用MTT比色法及流式细胞仪器研究了溶剂提取物干细胞活性,采用GC-MS技术研究每一个提取物,根据总离子流色谱图的相同保留时间和相应峰面积,获得龟版浸膏GC-MS生物活性指纹图谱。结果初步结果表明溶剂提取物均能促进鼠bMMSCs的体外增殖,用龟版浸膏GC-MS生物活性指纹图谱来预测中药"四物汤"的干细胞活性,预测准确率达83.3%。结论用这种方法来预测未知中药样品的干细胞活性,有一定的可靠性。
张越华曾和平陈东风
关键词:龟版干细胞增殖气相色谱-质谱联用分析指纹图谱
基于CzHQZn发光的白光有机电致发光器件被引量:8
2009年
利用一种新材料(E)-2-(2-(9-ethyl-9H-carbazol-3-yl)vinyl)quinolato-Zinc(CzHQZn)作空穴传输层和发光层制备了白光有机电致发光器件(WOLED),器件的结构为indium-tin oxide(ITO)/4,4′,4′′-{N,-(2-naphthyl)-N-phenylamino}-triphenylamine(2T-NATA)(22 nm)/CzHQZn(xnm)/N,N′-bis-(1-naphthyl)-N,N′-diphenyl-1,1′-biphenyl-4,4′-diamine(NPBX)(ynm)/2,9-dimethyl,-4,7-diaphenyl,1,10-phenanthroline(BCP)(10nm)/tris(8-quinolinolato)aluminum(Alq3)(68-x-ynm)/LiF(0.5 nm)/Al。研究发现发光层CzHQZn和NPBX的厚度对器件的发光性能有较大的影响。当CzHQZn厚度x为22 nm、NPBX厚度y为8 mm时,得到了色度最好和效率最大的WOLED,最大电流效率为0.9 cd/A(at 10 V),最大亮度为3514 cd/m2(at 10 V),此时色坐标为(0.3579,0.3182),接近白光的等能点(0.33,0.33)。器件的另一个重要特点是开启电压比较低为4 V。
丁桂英姜文龙汪津王广德丛林欧阳新华曾和平
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