静电复印用双偶氮颜料的研究

合成了含邻氯双偶氮颜料,借助元素分析、红外光谱、吸收光谱、X射线粉末衍射等对其结构与性能进行了表征,并制成了功能分离型结构的有机光导器件。光电特性显示,该器件对可见光有很好的敏感性,是一种良好的静电复印用有机光导材料。     

新显色剂2-四氮唑偶氮-5-二乙氨基酚与铁的显色反应

近年来 ,人们合成了许多噻唑偶氮、吡啶偶氮、喹啉偶氮类有机显色剂 ,将它们应用到环境及生命物质中微量金属离子的光度法测定 ,结果较为满意。但对含氮唑偶氮类有机显色剂的研究甚少[1] 。为此 ,合成了咪唑偶氮类有机显色剂ＩＺＡＰＮ[2 ] ,三氮唑偶氮类显色剂ＴＺＡＰＮ[3 ] 、ＣＴＺＡＰＮ[4] 并用于金属离子光度法测定[5,6] 。为了考证试剂结构中含氮唑母体中氮原子数对其选择性和灵敏度的影响 ,又设计合成了四氮唑偶氮类试剂 2 四氮唑偶氮 5 二乙氨基酚 (ＴＴＺＡＰＮ ,试剂合成和性质另文报告 ) ,其结构式为 :研究发现该试剂在ｐＨ …     

新型可溶性偶氮聚酰亚胺及其作为液晶光定向层应用的初步研究

以 4 ,4′ 二 (1,2 苯二酸酐 4 羧酸酯 )偶氮苯为二酐单体 ,4 十六烷氧基 4′ ,4″ 二氨基三苯甲烷为二胺单体 ,通过缩聚反应合成了可溶性偶氮聚酰亚胺 .采用红外光谱、氢核磁共振、紫外光谱和热分析等手段 ,对产物的结构、热性能及光学性能等进行了表征 .在紫外光辐照下 ,上述聚合物表现出明显的光色效应 .经线性偏振紫外光 (LPUV)辐射后的上述偶氮聚酰亚胺定向层能诱导液晶盒中液晶分子发生定向沿面排列 ,且取向均匀 .上述实验表明 ,合成的偶氮聚酰亚胺是一类潜在的液晶光定向材料 .     

有机光导器件用聚酯成膜剂的合成及表征

以对苯二甲酸、间苯二甲酸、新戊二醇及1，6-己二醇为原料进行四元共缩聚反应，得到聚酯型树脂。利用^1H核磁共振谱测定聚酯中各组分含量，测试了聚酯的耐磨性，并用合成的聚酯与聚碳酸酯共混制备光导器件，利用SP-428型静电纸分析仪测试光导器件的光电性能。实验结果表明由聚酯和聚碳酸酯共混物制备的有机光导器件能有效地防止光疲劳现象。     

n-Si/TiO2/偶氮颜料微纳米尺度下的光生电荷转移性质

本文利用KFM 研究了n-Si/TiO₂/偶氮类颜料微纳米尺度下的光生电荷转移性质, 为进一步理解光电活性体系工作的微观机理提供了依据.     

份菁类有机光导材料分子结构及晶体结构与光,电导性能的关系

份菁类有机光导材料分子结构及晶体结构与光、电导性能的关系常友明（中国科学院化学研究所，北京１０００８０）有机光导材料是以光激发产生电荷载流子的有机固体材料是重要的信息功能材料。已被广泛应用于感光材料、复印机、计算机终端仪器的激光打印机。在能源日趋紧缺...     

甲(月朁)类显色剂的合成及其在分析上的应用

有机显色试剂的研制及其在分析化学中的应用仍在继续发展。特别是变色酸偶氮类、杂环倜氮类(毗啶偶氮和噻唑偶氮)、三芳甲烷类和冠醚类等显色试剂,受到分析工作者的较大重视。但是,甲(?)类显色剂,却较少引起人们的注意。     

硼-铍试剂Ⅲ配合物吸附波及其应用

微量硼的测定,常用比色法,BF_4~ˉ电极法及光谱法。用极谱法测定硼,尚未见到前人的工作报道。有关硼的极谱性质,Kolthoff亦未曾在极谱学中论及。硼在通常条件下不能在滴汞电极上还原,利用硼与某些有机试剂的配合物极谱波间接测定硼,乃是一个重要途径。有的文献曾对一些金属-偶氮邻羟基类配合物的极谱波进行详细论述。木文试验研究了铍试剂Ⅱ、铍试剂Ⅲ等邻位羟基偶氮试剂与硼的配合反应,发现在一定条件下,硼与铍试剂Ⅲ     

偶氮化合物的光电导性能的研究

本文合成了五种双偶氮颜料,它们是以芴酮为桥基,以含有五种不同取代基的色酚为偶合剂的化合物.测定了这些化合物的吸收光谱和X射线衍射光谱;分别以这五种偶氮颜料为电荷产生材料制备了功能分离型双层光电导体,并对它们的光电导性能进行了研究.     

IAP-4S螯合物和离子对反相高效液相色谱测定铁、钴和镍

借有机分析试剂螯合物和高效液相色谱测定金属离子,最常用的有机分析试剂有:二硫代氨基甲酸盐、8-羟基喹啉、4-(2-吡啶偶氮)-间苯二酚和其它高灵敏的偶氮染料。咪唑偶氮类显色剂是一类新合成的高灵敏有机分析试剂.2-(2-咪唑偶氮)-苯酚就是其中的一种.它难溶于水,但将其磺化后得到2-(2-咪唑偶氮)-苯酚-4-磺酸(IAP-4S)及其金属螯合物均溶于水.本文首先探讨了它与Fe~(2+)、Co~(2+)和Ni~(2+)生成螯合物及其离子对反相HPLC分离的各种条件,并提出了同时测定铁、钴和镍的新方法.     

A density functional study of 1,1,5‐tris(4‐dimethylaminophenyl)‐3‐methyl‐divinylene

The optimized molecular structural parameters and UV‐vis, IR and Raman spectra of a dye molecule with an open formula of 1,1,5‐Tris(4‐dimethylaminophenyl)‐3‐methyl‐divinylene are determined by means of density functional theory (DFT) calculations using B3LYP/6‐31G** formalism. Neutral and cationically charged molecules are used for DFT computations. C? C, C?C, and N? C bond distances of dimethylaminophenyl groups of the dye molecule are in reasonable agreement with the experimental and theoretical C? C, C?C, and N? C bond lengths of the group reported in the literature. Because Vis‐NIR region is near UV‐Vis region in the electromagnetic spectra, calculated maximum wavelengths of UV‐vis spectra are close to those of the experimental VIS‐NIR spectra reported. C?C stretching frequencies calculated for dimethylaminophenyl, alkene, and benzene ring groups are also in good agreement with experimentally reported values. All calculated frequencies fall within 2.2% of the experimental frequency region. © 2009 Wiley Periodicals, Inc. Int J Quantum Chem, 2010     

掺铈纳米TiO2薄膜制备及光催化降解甲醛甲苯

通过Sol-Gel工艺在玻璃表面及多孔陶瓷表面制得了均匀透明的掺铈纳米TiO2薄膜．通过SEM、XRD及UV-Vis等手段对玻璃表面掺铈纳米TiO2薄膜进行了表征．结果表明，薄膜表面无开裂现象、膜内部比表面积大、TiO2分布均匀．薄膜中出现的锐钛矿相在(101)面有一定的择优取向，且UV-Vis研究表明，掺铈纳米TiO2薄膜在近紫外的吸光度有明显提高．利用自行设计的反应器，以多孔陶瓷为介质，对甲醛、甲苯等有机物进行了光催化降解研究．结果表明，掺铈纳米TiO2薄膜对甲醛甲苯有极高的光催化降解效率，由于薄膜成本低廉，易于工业化，为净化室内空气开辟了新的途径．     

Effects of Cobalt Doping on the Microstructure and Optical Properties of ZnAl2O4 Nanoparticles

Co-doped ZnAl₂O₄ nanoparticles were prepared by hydrothermal method. The samples were characterized by XRD, HRTEM, EDX, FT-IR, XPS, PL, and UV–Vis, and the effects of cobalt doping on the microstructure and optical property of the samples were studied. The experimental results showed that Co-doped ZnAl₂O₄ nanoparticles synthesized by this method are single phase with cubic crystal structure, no other impurity phases were observed. Furthermore, with increasing the Co²⁺ concentration, the average crystallite size of the Co-doped samples became smaller. The absorption bands in FT-IR spectra are broadened in the low frequency region, the PL spectra had the red-shift and the UV–Vis peaks intensity gradually enhanced.

     

含螯合型双膦配体羰基Fe（Ⅱ）化合物紫外—可见光谱性能的研究

地双膦配体羰基铁化合物的紫外－可有收峰作发属,讨论了确定金属有机化合物ＵＶ－ＶＩＳ、Ｍ－ＬＣＴ带的方法,研究了卤素对Ｍ－ＬＣＴ带,ｄ－ｄ跃迁吸收的影响以及ＣＴ带的浓度效应。     

Isolation and Characterization of Radical Anions Derived from a Boryl‐Substituted Diphosphene

Radical anions of a diphosphene with two boryl substituents were isolated and characterized by single‐crystal X‐ray diffraction, electron spin resonance (ESR), and UV/Vis absorption spectroscopy as well as DFT calculations. Structural analysis of the radical anions revealed an elongation of the P=P bond and a contraction of the B−P bonds relative to the neutral diphosphene. The UV/Vis spectra of these radical anions showed a strong absorption in the visible region, which was assigned to SOMO‐related transitions on the basis of DFT calculations. The ESR spectra revealed that the hyperfine coupling constant with the phosphorus nuclei is the smallest that has been reported thus far. The results of the DFT calculations furthermore suggest that this should be attributed to a soaking of electron spin to the vacant p orbitals of the boryl substituents.     

主链含有苯并噁唑环的PPV型齐聚物的合成

以-甲基-2-氯甲基苯并(口恶)唑和对二苯甲醛为主要原料,通过两次Wittig-Horner反应,合成了未见文献报道的主链含有苯并-NFDA1-唑环的PPV型齐聚物.目的在于在PPV聚合物主链中嵌入电子传输型结构单元,提高聚对苯撑乙烯共轭链的电子传输能力,改变PPV的发光特性.分析数据表明,该齐聚物的M_w为2500,并且分子结构中的乙烯基 C＝C 双键均为反式结构特征.UV-Vis吸收光谱特征峰λ_max等于497 nm.     

Absorbance Behavior of Polyaniline‐Poly(Styrenesulfonic Acid) Complexes and Tungsten Oxide

This research focuses on the UV‐Vis. absorbance spectra of the hybrid organic/inorganic complementary electro‐chromic device (ECD), comprising polyaniline‐poly(styrenesulfonic acid)[PANI‐PSSA] complexes and tungsten oxide (WO₃) thin film coupled in combination with a polymer electrolyte poly(2‐acrylamido‐2‐methyl‐propane‐sulphonic acid)[PAMPSA]. PANI‐PSSA microstructure surface images have been studied by AFM. By applying a potential of ?3.0 V across the two external ITO contacts, we are able to modulate the light absorption also in the UV‐Vis region (200–900 nm) wavelength region. For example, the absorption changes from 1.20 to 0.6 at 720 nm.     

Study on Nanofibers of Polyaniline via Interfacial Polymerization

Uniform polyaniline nanofibers were prepared by interfacial polymerization. The nanofibers had a diameter of 80 nm and a length of about 1μm. The effect of centrifugal force on the morphology of the nanofibers is discussed. In situ UV‐Vis spectra indicated that the interfacial polymerization process was similar to the solution polymerization process. An “expanded‐partly doped” stage of interfacial polymerization was observed for the first time in the in situ UV‐Vis spectra.     

含芳香稠环或杂环的光致变色螺吡喃化合物的光谱性能及与DNA作用研究

研究9种带有芳香稠环或杂环基团的光致变色螺吡喃化合物的光致变色性能和荧光性质.通过紫外-可见吸收光谱和荧光光谱对该类化合物与DNA相互作用性能进行了初步探讨.     

自组装膜中原位光反应固定化脱氧核糖核酸及膜稳定性

通过静电沉积的方法构筑了含有脱氧核糖核酸(DNA)和重氮树脂(DAR)的交替多层膜.在紫外光照射下,这种静电沉积多层膜相邻层间DNA上的磷酸基团与DAR上的重氮基团发生反应,从而将DNA共价连接到多层膜中.利用紫外-可见吸收光谱和掠角反射吸收傅里叶变换红外光谱(GRAFTIR)研究了这种相邻层间的光化学变化.刻蚀实验结果发现,与光照前相比,光照后的膜在盐溶液中的稳定性大大增强.