查询词典 fluorescence

In the system of A-D phenothiazine derivatives, the transition dipole moments M flu were determined mainly by direct interactions between the solvent-equilibrated fluorescence 1CT state and ground state because of their lack of significant change with increase of the solvent polarity.

在此吩噻嗪衍生物的体系里，荧光过渡态偶极矩主要由溶剂平衡的电荷转移态和基态间的作用所决定，因为它在不同极性的溶剂中缺乏明显的改变。

The major goal for our research is to use simple synthesized method for various fluorescence dye derivatives containing Phenothiazine core via Heck reaction and Suzuki coupling reaction that unprotected at 10N-H.

中文摘要本实验的研究目的为利用简单的合成步骤：在Phenothiazine 的3，7-位置上，藉由Heck reaction和Suzuki coupling reaction直接合成出 10NH没有保护基的萤光染料。

In order to diagnose phenylketonuria early and rapidly for newborns,the fluorescence method for detecting phenylalanine is proposed.

苯丙酮尿症是一种由于人体正常染色体缺陷，造成的新生儿体内苯丙氨酸代谢紊乱性疾病。

The optical properties, fluorescence quantum yields and electrochemical properties of these polymers were investigated. It was found that the optical properties of the polymers did not show obvious dependence on the alkyl length on phenylene.

苯环上烷基侧链长度的改变对取代共聚物的光谱、电化学和发光效率等影响很小；而随着苯环上烷氧基侧链长度的增加，聚合物的光谱稳定性逐渐增强，荧光发射光谱中的0-1转变逐渐被抑制，荧光发射半峰宽减小。

The most parts of thesis as follows:1. Five symmetrical intra-molecular charge transfer oligomeric phenylene vinylene light emitting materials were designed and synthesized using oligomeric phenylene vinylene as a framework.2. The structures of target molecule were characterized by ~1HNMR,~(13)CNMR, IR, MS and element analysis.3. In order to study the influence of the location and numbers of electron-donor and electron-acceptor on their photoelectric performance by changing length of OPV chain, the UV spectra and fluorescence spectra of target compounds has been compared. We have researched into main factors effecting on material emitting red-shift; organic electroluminescence device was prepared using the compound P4. The capability of eletroluminescence was researched.4. The photoelectric properties of P4 was explained by quantum chemical calculation (the Gaussian 98 quantum chemistry program). It is greatly contributed know the whole process of charge transfer to guide the design of red emitters.

本文研究的内容主要包括以下部分：(1)设计并合成5个对称的以齐聚苯乙烯类为骨架的分子内电荷转移型齐聚苯乙烯类发光材料；(2)通过IR，MS，~1H-NMR，~(13)C-NMR和元素分析对所合成的目标化合物进行表征；(3)通过对目标化合物的紫外光谱和荧光光谱比较分析，研究改变OPV的长度，电子给体和电子受体的位置及数量对其光电性能的影响，探讨材料发射红移的主要因素；选取性能良好的目标化合物P4制备成OELD器件，对其电致发光性能进行研究；(4)运用Gaussian98量子化学程序包，采用量子化学方法对目标化合物P4的光电性能从理论加以解释，进一步认识荷移跃迁的整个过程，为红光材料的设计加以指导。

It is the phosphor coating, not the mercury vapour itself, that produces the fluorescence effect—and hence the visible light.

是被覆的磷而不是汞蒸气，产生荧光现象——和可见光。

Fluorescence, phosphore scence; radiati onless

荧光、磷光；无辐射跃迁

The absorption spectra, quantum yield of fluorescence and phosphorescence of these compounds have been measured.

测定了它们的吸收光谱、荧光和燐光量子产率。

In Section 3, fluorescence and phosphorescence spectra of N/TlDS/SDS system were investigated in the presence of external magnetic field.

第三部分研究了外加磁场对N/TlDS/SDS体系荧光和磷光光谱的影响。

This physical process differs from fluorescence , phosphorescence , and other forms of luminescence , in which a material emits light.

这种物理过程与荧光，磷光，等其他形式的材料发光不同

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。