光致变色全氟环戊烯类二芳烯化合物的合成及其性质研究

合成了两种新的二芳基乙烯类光致变色化合物1，2-双(2-甲基-5-(4-乙氧基苯基)噻吩-3-基)全氟环戊烯(1a)和1，2-双(2-甲基-5-(对氟苯基)噻吩-3-基)全氟环戊烯(2a)，并且研究了其在不同溶剂和浓度中的UV-Vis光谱、荧光性质和光致变色反应动力学特征．实验结果表明，化合物1a和2a具有良好的光致变色性质和较强的荧光；光致变色闭环反应为零级反应，开环反应为一级反应．     

本征和Al3+掺杂ZnO薄膜的特性研究

采用溶胶-凝胶方法在载玻片衬底上制备了本征及不同Al3+掺杂浓度的ZnO:Al薄膜,利用X射线衍射(XRD)、原子力显微镜,紫外-可见光吸收光谱及霍尔效应研究了Al3+掺杂浓度对ZnO:Al薄膜结构和光电性能的影响。结果显示,ZnO:Al薄膜为六角纤锌矿晶体结构,具有很高的沿c轴的(002)择优取向,Al3+掺杂并没有改变ZnO的晶体结构,只是Al取代了Zn;掺杂前后薄膜样品均在ZnO带边吸收的位置有较强的吸收而在可见光范围吸收较小;并且当Al3+掺杂浓度为1.5%(摩尔百分比)时所获得的ZnO:Al薄膜具有最小的电阻率,为26Ωcm。     

Characterization of Some Local Petroleum Residues by Spectroscopic Techniques

Abstract

Two vacuum residues were delivered from two different petroleum refineries, one from Suez Petroleum Company and the second from Alexandria Petroleum Company. Two heavy residues were subjected to solvent extraction using n-pentane, n-heptane, and ethyl acetate. The studied residues were fractionated into their components. Infrared spectroscopy was applied to study the distribution of functional groups contained in samples and their components. Some ratios calculated from the peak heights of selected infrared bands allow for a better comparison. The UV-Vis spectroscopic technique was applied to the aromatic fraction to determine how much mono-, di-, and polyaromatics are present in the aromatic fraction. The monoaromatics represent the lowest constituent among the aromatics present, whereas the polyaromatics and diaromatics are predominantly present and form the major constituent.     

紫外-可见漫反射光谱-支持向量回归法快速测定西咪替丁片剂含量

采用紫外-可见漫反射光谱-支持向量回归法（UV-Vis DRS-SVR）建立了快速、无损测定西咪替丁片剂的定量方法。人工配制58个西咪替丁片剂粉末样,分为校正集和预测集。经过光谱预处理、异常值剔除和参数优化,最终采用原始光谱,在220.17 nm-980.80 nm,参数g=0.02, C=20, p=0.03的条件下,建立SVR模型,校正集和预测集的决定系数（R2）分别为0.9782, 0.9871,对5个盲样和15个批次市售西咪替丁片剂的预测均方根差（RMSEP）分别为0.0360, 0.0448,比PLS模型的预测精度更高,效果更好。研究表明,UV-Vis DRS-SVR用于快速、非破坏性测定药物制剂中的活性成分是可行的,有望用于制剂生产过程中的质量控制。     

并五苯的溶解及其薄膜性能表征

报道了并五苯的邻-1,2-氯苯溶液的制备方法及在Si和SiO2表面形成的固态薄膜的紫外-可见光光谱(UV-Vis)、光学显微镜、扫描电镜(SEM)、原子力显微镜(AFM)和X射线衍射(XRD)的表征结果.该溶液在100℃左右能形成较大面积、较均匀的多晶并五苯薄膜.     

粘质沙雷氏菌代谢产物灵菌红素的鉴定

从柠檬酸厂糖化车间酸性土壤中筛选得到一株产红色素的粘质沙雷氏菌（Serratia marcescens）ZSG,菌株发酵液经酸性甲醇萃取、浓缩、硅胶柱层析、薄层色谱和柱色谱等分离纯化后,得到灵菌红素纯品,并采用紫外可见吸收光谱、红外光谱、液质联用分析对其结构进行了表征。     

Bi_2S_3/BiOI复合材料的制备及可见光光催化性能

采用超声辅助水解法制得BiOI,并采用阴离子交换法,以硫代乙酰胺为硫源,在BiOI表面原位生长Bi2S3,获得Bi2S3/BiOI复合光催化材料。利用X-射线衍射(XRD)、扫描电子显微镜(SEM)对Bi2S3/BiOI复合光催化材料的结构及表面形貌进行了表征,并研究了Bi2S3/BiOI复合材料在可见光条件下对甲基橙溶液的降解性能。     

电致发光材料三芳胺聚合物的能带结构表征

采用循环伏安(CV)法结合紫外-可见(UV-Vis)吸收光谱表征了4种新型电致发光材料三芳胺聚合物TPD(PTPD)的能带结构,并对引入的基团及分子结构对其能带结构的影响进行了探讨。结果表明,从聚合物TPD和小分子TPD的UV-VIS吸收光谱的最大吸收来看,聚合后TPD的能带结构没有太大的改变。从循环伏安图看出,材料的具有较好电化学稳定性。并制成了ITO(氧化铟锡)/PTPD/Alq3(8-羟基喹啉铝)/Mg:Ag异质结电致发光器件,与典型的ITO/TPD/Alq3/Mg:Ag器件进行了比较,研究发现其器件的稳定性有的明显提高。     

Thermolysis and Photolysis of C60 Diozonides

Ozonation of C₆₀ in o-xylene produced three C₆₀(O₃)₂ diozonides that were separated from one another and from two C₆₀(O₃)₃ triozonides by High Performance Liquid Chromatography (HPLC). Upon thermolysis at 10, 15, and 16.6°C, each of the diozonides dissociated sequentially, first to a C₆₀O(O₃) oxyozonide, then to a C₆₀O₂ diepoxide. The three diepoxides were stable in solution for at least 3 weeks. The mean lifetimes of the three diozonides were 52 ± 5, 62 ± 6, and 17.3 ± 1.8 min, respectively (all at 15°C). The mean lifetimes of the three oxyozonides were 69.7 ± 0.7 and 58 ± 6 min at 16.6°C, respectively and about 240 min at 10°C. Photolysis of the diozonides yielded two dioxidoannulenes with UV-Vis adsorption maxima at 333 and 332 nm, and what appeared to be an epoxide-oxidoannulene with UV-Vis adsorption maximum at 327 nm. These annulenes were observed to form dimers. We have synthesized and characterized six C₆₀O₂ dioxides, at least three and possibly four of which were hitherto unknown. We report the discovery of oxyozonides that form during the dissociation of diozonides.     

Electronic Structure of C60, CuPc, and C60/CuPc Nanoparticles and their Layers

The idea to form C₆₀/CuPc dispersed nanoheterojunctions by photoexcitation of a mixture of C₆₀ and CuPc nanoparticles has been realized. The electronic structure of the nanoparticles and dispersed nanoheterojunctions formed in the mixture has been characterized by UV-Vis spectroscopy and the comparing with known experimental ultraviolet photoelectron spectra and theoretical models of electronic structure of these molecules. For the mixture of C₆₀ and CuPc nanoparticles in toluene and their coating layer on the quartz substrate the band offsets of the edges of CuPc VB and lowest unoccupied molecular orbital (LUMO) of C₆₀ band are ΔE=1.55 eV and 1.4 eV, respectively. These results show clearly the presence of C₆₀/CuPc dispersed nanoheterojunctions in the solution and on the quartz surface.