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5,10,15,20—四(对—乙酯苯基)卟啉LB膜的结构 总被引:1,自引:0,他引:1
对卟啉类化合物LB膜的结构、电性质和气敏性的研究已见报道。本文利用膜天平和UV-Vis分光光度计研究了标题化合物在气-液界面上的成膜特性、分子间相互作用和LB膜的结构。5,10,15,20-四(对-乙酯苯基)卟啉(TPEPP)由5,10,15,20-四(对-氰苯基)卟啉和乙醇酯化得到。元素分析测定值与计算值相符。λ(CHCl_3,nm):421,515,550,590,645;ν(KBr压 相似文献
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研究了两亲性卟啉5,10,15,20-四-(4-N,N,N-二甲基十六烷基氨基苯基)卟啉(TDMC16PP)在气/液界面上的成膜性能,制备了其多层LB膜。用UV-Vis吸收光谱、荧光光谱、偏振UV-Vis吸收光谱和小角X射线衍射对LB膜进行了测试表征。结果表明:两亲性卟啉TDMC16PP具有良好的成膜性能,其LB膜性质稳定,有较好的结构均匀性和周期性。在LB膜内,脂肪链并不是直立的,卟啉大环平面与基片平面成42.5°排列。 相似文献
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The rotation dynamics of C60 molecules in organic superconductor K3C60 has been investigated from the viewpoint of intramolecular interaction.It is determined that the rotation of C60 at room temperature has been frozen up within a small region of rotation angle (0→50°),and pointed out that the reason for the freeze is the physical interaction rather than the geometrical hindrance.The computations of the interactions for alkali-doped compounds A3-xAxC60(x=1,2,3;A,A'= K,Rb,Cs) other than K3C60 have also been carried out.From the obtained results,it is seen that the superconducting transition temperatures Tc are strongly connected with the interactions in them,and this observation is consistent with the discovery of the correlation between Tc and lattice constants a 相似文献
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研究了C60在四苯基卟啉衍生物5,10,15,20-四-对(癸酸α氧基)苯基卟啉(TDPP)及5,10,15,20-四-对(乙酸α氧基)苯基卟啉(TAPP)单层膜中的分散状态。空气/Cd^2+水溶液界面上混合单层膜的π-A等温线、混合膜与花生酸(AA)形成的交替多层膜的低角X射线衍射实验及混合单层LB膜的UV-Vis光谱表明,在TDPP/C60(1:1)的混合单层膜中,C60以单分子或(和)聚集体 相似文献
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1,3,6,11,13,18,28,31-八溴富勒烯-C_(60)LB膜特性及导电性的研究叶玉汉,肖玉方(宁波师范学院化学系,宁波,315020)(中国科学院兰州化学物理研究所)关键词1,3,6,11,13,18,28,31-八溴富勒烯,C_(60)L... 相似文献
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We have theoretically investigated the one- and two-photon absorption properties of C60 and C70 using the ZINDO method. From the results it is suggested that the one-photon absorption spectra are in agreement with the experimental observations. It is found that the maximum TPA cross section of C70 is more than twice that of C60,which is consistent with the experimental results. A notable point is that the TPA process of C60 is different from that of C70 as well as other ordinary conjugated molecules. 相似文献
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Phthalocyaninesareexcellentpigmentswithgo0dthermalandchemicalstability.TheypossessanumberofcharacteristicsthatmakethemsuitableforaPplicahonsinthefieldofmolecularelectronicsl.LBfilmsofphtalocyanineshavebeenwidelystudiedinthepastdecades2'3.PreviouslywereportedthefabricationofmixedLBfilmsofanamphiphilicphthalocyanineandhydrophobicporphyrin4.Herewereportthedepositionandcharacterizationofthemixedfilm0fphthalcyaninehavingapendantcr0wnethergroupandnacceptor(picrate)basedonhost-guestcomPlexation.Mo… 相似文献
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我们曾报道了沉积在 Sn O2 导电玻璃基片上的 5 ,1 0 ,1 5 ,2 0 -四 -(4 -十六烷基吡啶基 )卟啉 [TC16 Py P(4 ) ]LB膜的光电性质 [1] .结果表明 ,电解质溶液中含有电子给体和受体时 ,由于超敏化作用 ,样品光电效应明显增强 .在研究其它 LB膜时 ,我们发现将两亲性卟啉分子 A与等物质的量憎水性化合物 B一起拉膜时 ,有可能得到一一对应的混合 LB膜[2 ] .如果 A和 B分别为电子给体和受体 (反之亦然 ) ,A和 B之间应有较强的相互作用 .将这种混合 LB膜沉积在基板上 ,可能表现出新的电子与光学性质 ,从而得到具有多种功能的新材料 .本文… 相似文献
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研究了PVB单分子膜的π~A曲线和稳定性,沉积了优质LB膜,发现将PVB与CdSt2形成交替异质的LB膜能提高膜的光学质量;在CdSt2LB膜的上面封装PVBLB膜能保持CdSt2LB膜的结构。 相似文献
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采用氯仿作为铺展溶剂,将嵌段共聚物聚苯乙烯-聚(4-乙烯基吡啶)(PS-b-P4VP)稀溶液铺展于空气与水界面上,利用Langmuir-Blodgett(LB)膜技术转移至固体基底.研究了不同的嵌段比、表面压和小分子1-芘丁酸(PBA)的加入对嵌段共聚物气液界面聚集组装的影响.研究发现随着亲水段(P4VP)的增加,聚集组装结构由纳米片状、带状转变成纳米条状、纳米点状结构.表面压对纯PS-b-P4VP聚集组装产生影响,表面压增大,组装体排列紧密;随着表面压的继续增大,单层聚集结构遭到破坏,发生堆叠.加入PBA小分子后,PBA与PS-b-P4VP形成氢键,形态发生明显变化,原来的片状结构转变为条状或点状结构. 相似文献
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Fullerenesareakindofcarbonallotropesfoundrecently,andhavedistinctivestructuresandproperties.Forexample,C60hasafootballlikecarbonskeletonwith20sixmemberedrings,12fivememberedringsandalargeballshelllikeπbondsystem.Alternatively,C70hasanellipsoidlikecarbonskel… 相似文献
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C60衍生物与C60混合物中富勒烯的生长研究 总被引:1,自引:0,他引:1
富勒烯分子生长方面的研究,对于富勒烯的基础研究以及潜在应用有着重要的意义,因此引起了科学界的广泛兴趣和研究,Yeretzian[1]、Campbell[2],Rao[3]等人相继用不同的实验方法对C60的融合作了详细研究,但C60的生长动力学过程依然是个悬而未决的问题.我们实验室已对C60的正负离子解离以及C60加成衍生物中C60的解离和生长作了较深入的研究:发现C60正负离子解离时电荷具有不同的转移通道,即C朋解离时电荷留在碳笼上,而C60解离时电荷易转移到小碳簇上,且C60解离以较缓慢的笼子收缩过程进行间.衍生物基团(如节基、薛基)对C。。… 相似文献
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SHI Zhan-Ling MAO Yi-Ping TONG Wei JIN Li-TongDepartment of chemistry East China Normal University Zhong Shan Road 《中国化学》1994,12(2):117-122
The construction of adsorptive type C60 modified electrode and its electrochemical reduction and oxidation behavior in aqueous solutions are described in this report. Four pairs of one-electron transfer reduction and oxidation cyclic voltammetry is obtained in aqueous solution containing 30% CH3CN and 2% (C2H5)4NOH. It is reported in this paper that the C60 modified electrode also catalyzes the electrochemical reduction of dissolved oxygen in 40% DMF and 2% (C2H5)4NOH aqueous solution and this might open a new field for the potential applications of C60 in electrochemistry and electroaualytical chemistry. 相似文献