Synthesis and Photophysical Properties of Novel Rod-shaped and Star Shaped Fluorescent Phosphane Derivatives

1 Results Over the past few years significant research has been directed toward the development of organic materials for potential application in molecular photonic devices[1] and the development of sensors[2].Interest in these materials is primarily due to the infinite numbers of possible molecular structures with the desired properties,by virtue of the tremendous capabilities of organic synthesis.For the development of a new fluorescent molecular sensor consisting of a recognition moiety linked to a f...     

粗糙集理论中粗糙函数定义的改进及粗糙导数性质的证明

对二元、n元粗糙函数、k阶粗糙导数的定义进行了改进,给出了一元、二元粗糙导数的性质,并对一元、二元、n元粗糙导数的性质给出了较详细的证明.     

广义Baskakov算子及导数的正逆定理

给出了广义Baskakov算子的点态正逆定理,并研究了广义Baskakov算子导数与所逼近函数光滑性之间的关系.     

Indoxyl derivatives of drug metabolites

Summary Indoxyl derivatives were detected as minor products among the urinary metabolites of two trial drugs, a benzodiazepine (GP 55 129) and a benzophenone (CGP 11 952). Their structures were elucidated by NMR and mass spectroscopy. Presumably, metabolites containing potential aldehyde functions react spontaneously with endogenous indoxyl. Such derivatives have not hitherto been encountered in drug metabolism.     

Photoconductivity of fullerene derivatives

Two fullerene derivatives (compounds 1 and 2) have been synthesized. Their redox properties have been measured by cyclic voltammetry. The photoconductivities of poly(N_vinylcarbazo_le) (PVK) doped with fullerene and with their derivatives have been studied to explore the possible relationship between the reductibility of fullerenes and the photoconductivity of fullerenes_doped PVK. The charge generation efficiencies of PVK doped with fullerene and with its derivatives have changed remarkably: the diversity of charge generation efficiency is obvious in different doping systems. The result indicates that there is charge transfer between fullerenes and PVK.     

高锰酸钾引发下淀粉／丙烯腈的接枝共聚反应

以高锰酸钾为引发剂,系统研究了在淀粉与丙烯腈接枝反应过程中各种反应对数如反应温度,单体浓度,引发剂浓度,催化剂浓度,淀粉的预处理温度对淀粉接枝反应及共聚物组成的影响,探讨了不同来源的淀粉和不同玉米变性淀粉接枝反应的能力,并分析了在反应过程中锰离子价态的变化,为进一步搞清锰离子引发淀粉接枝反历程提供了依据。     

吖啶酮类衍生物的合成及其电学性质研究

由取代苯胺和邻氯苯甲酸合成了7个吖啶酮类衍生物,用循环伏安法测出它们各自的电势,发现所合成的吖啶酮类衍生物都比常用的电子传输材料2-(4-联苯基)-5-(叔丁苯基)-1,3,4-二唑(PBD)容易被还原,具有较高的电子亲和势.     

信用衍生工具估值模型研究

为了解决信用衍生工具定价问题,在扩散过程的基础上,引入的跳跃过程描述突发性违约事件,建立了基于跳跃—扩散过程的信用衍生工具的估值模型,从而克服了传统结构化估值模型中,不会发生不可预测违约的缺陷。     

嘧啶环二炔氮桥C60衍生物的合成及非线性光学性质

合成了嘧啶环二炔氮桥C₆₀衍生物C₆₀NPD ,研究了在532nm、脉宽 8ns条件下的非线性光学特性。通过Z-扫描实验发现C₆₀NPD有很强的非线性吸收和非线性折射,并获得了三阶非线性光学系数χ⁽³⁾ 。同时也研究了光限幅特性，实验结果表明C₆₀NPD有较低的光限幅箝位值。     

二维模型风振特性强迫振动实验研究

从颤振的角度讨论了空气动力(包括升力和力矩)对振动的影响，该实验模型采用二维截断模型。为了完成模型的纯弯和扭转单自由度强迫振动实验，专门设计了一套强迫振动机构，并用计算机采集和处理数据。然后利用模型的纯弯和扭转单自由度强迫振动实验得出了颤振导数，绘出颤振导数随无量纲风速K变化的曲线图，较好地描述了其随无量纲风速K的变化规律。