三维全扫描荧光法在油田单井评价中的应用研究

采用信息量大的三维全扫描荧光法，以发射、激发波长和荧光强度三维空间荧光图和荧光强度等高线图描述样品中的芳烃含量。以总荧光强度、特征荧光强度及Ｒ值来研究芳烃含量随井深的变化情况和油气运移机制。     

Separation of nonpolar analytes using methanol-water mixtures at elevated temperatures

Pure subcritical water has been found to be an efficient mobile phase for reversed-phase separations of both polar and moderately polar compounds. However, subcritical water must be modified with organic solvent in order to elute nonpolar analytes in an efficient manner. In this study, the separation of polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), and benzene, toluene, and p-xylene (BTX) was performed by using heated methanol-water mixtures as the mobile phase. Temperatures employed in this study ranged from 21 to 140 °C, while the percentage of methanol in the mobile phase ranged from 52 to 90%. The retention times of analytes were matched under different mobile phase conditions by increasing the temperature and decreasing the percentage of methanol in the mobile phase.     

[Cu(Hsal)2(py)2]n晶体结构和二维堆积网络

０引言水杨酸具有羧基和羟基，是双功能基配体，羧基和羟基可分别脱去氢，因此有多种形式可参与配位（见Scheme１），其中Hsal－１的形式仅见一例报道犤１犦，其可靠性有待更多的研究来确证。对铜／水杨酸／吡啶三元体系的研究已有多篇文献报道犤２～４犦，亦有几种化合物合成，例如Cu（Hsal）２（py）２和Cu（sal）（py）２等。配合物Cu（sal）（py）２的可靠性值得怀疑，原文中无合成和表征犤３犦。铜／水杨酸／吡啶衍生物三元体系已有多个晶体结构报道犤５，６犦，但迄今无铜／水杨酸／吡啶三元体系晶体结构报道。对于配合物Cu（Hsal…     

聚二乙烯苯的取代反应研究

以悬浮聚合法制得一系列高交联聚二乙烯苯树脂，通过改变反应试剂、催化剂、反应溶剂考察了聚二乙烯苯树脂进行亲电取代反应的规律．结果表明，聚二乙烯苯树脂可发生亲电取代反应，反应程度较低．聚（对－二乙烯苯）的反应程度高于聚（间－二乙烯苯）．     

Corey化学酶与不对称合成

本文从立体化学和反应机理方面综述了Corey化学酶的催化作用及其在有机不对称合成中的应用, 指出了Corey化学酶与酶的相同点和不同点, 对于关键的反应过程态均以空间关系更为清楚的构象式表示。     

咪唑-1-羟酸酯类化合物的构效关系研究

利用CoMFA方法，对20种咪唑-l-羧酸酯类化合物进行了三维定量均效关系研究．研究结果表明，影响其药效的主要因素是空间结构．得到了具有较强预测能力的QSAR模型．在此基础上，设计了高活性的化合物，并发现了分子中存在着明显的芳环堆积现象，可能和对受体的识别有关．     

Two‐Photon Absorption Properties of Dehydrobenzo[12]annulenes and Hexakis(phenylethynyl)benzenes: Effect of Edge‐Linkage

Two‐photon absorption (TPA) properties of two trefoil‐shaped compounds with different edge linkages—tris(hexadehydrotribenzo[12]annulene) and tris(tetradehydrotribenzo[12]annulene)—and three asterisk‐shaped compounds having no edge‐linkage—hexakis(phenylethynyl)benzenes—are investigated experimentally by the open‐aperture Z‐scan and TPA‐induced fluorescence methods with wavelength tuneable femtosecond pulses. The compound with ethynylene edge‐linkage exhibits the most intense TPA (the maximal TPA cross section is 1300±170 GM at 572 nm where 1 GM=10^?50 cm⁴ s molecule^?1 photon^?1). The TPA activity of the compounds is primarily explained in terms of the planarity of the molecules in relation with the type of edge‐linkage.     

高迁移率有机薄膜晶体管材料进展

对近几年来高迁移率有机薄膜晶体管材料研究的主要发展作了简要介绍和评述,讨论了高迁移率有机半导体材料存在的问题和发展方向．     

Functional tetrahydroquinoxalines from perfluoroaromatic precursors

A short series of bromo- and nitro-polyfluorobenzene derivatives gave the corresponding tetrahydroquinoxaline systems upon reaction with N,N′-dimethylethylene diamine. This annelation strategy gives useful quantities of functionalised tetrahydroquinoxaline systems which may be interesting scaffolds for the drug discovery arena.     

Solid state reaction of aromatic ketones with heteroaromatics

The solid state reactions of p-nitroacetophenone,acetyl-ferrocene with indole were catalyzed by anhydrous zinc chloride or aluminum chloride,and gave exclusively the 1:2 condensation products.The solid state condensation of aromatic ketones with l-phenyl-3-methyl-5-pyrazolone was also investigated,and the 1:1 and 2:1 condensation products were obtained.The structures of eleven new products were determined by IR,MS,1H NMR and elemental analysis.