检索结果-南通市图书馆

Self-polymerization of Eu(TTA)_3AA in rubber and their fluorescence effect

Journal of Rare Earths 2013年第12期31卷 1130-1136页

作者：姚璐温世鹏段雪胡晓丹车明生景文峰刘浩亮刘力 State Key Laboratory of Chemical Resource Engineering College of Materials Science and EngineeringBeijing University of Chemical Technology Beijing Engineering Research Center of Advanced Elastomers College of Materials Science and EngineeringBeijing University of Chemical Technology State Key Laboratory of Organic-Inorganic Composites College of Materials Science and EngineeringBeijing University of Chemical Technology The 404 Company Limited. China National Nuclear Corporation Offshore Petroleum Engineering Co. Ltd.PetroChina

A simple europium complex,Eu（TTA）3 AA（TTA=4,4,4-trifluoro-1-（2-thienyl）-1,3-butanedione,AA=acrylic acid） was synthesized by a simple solution ***,two kinds of rubber matrix,nitrile-butadiene rubber（NBR） and silicone rubber（SiR） were used as the substrate for Eu（TTA）3 AA to prepare fluorescence *** neat Eu（TTA）3 AA complex showed the ability of self-polymerization when it was heated at 145 °*** was found that the fluorescence intensity of the neat Eu（TTA）3 AA decreased over 70% when the polymerization time was over 25 min at 145 °*** results also revealed that the polymerizated Eu（TTA）3 AA could be dispersed in nano-scale in two matrices and the luminescent intensities decreased 52% in NBR matrix,and 95% in SiR matrix compared with two relative compounds without *** optimize the luminescence intensity of the composites,the Eu（TTA）3 AA polymerization kinetic process in matrix was investigated in detail by controlling the temperature,the crosslinking agent,*** results showed that the peroxide could accelerate Eu（TTA）3 AA self-polymerization in the rubber matrix,and therefore improved the dispersion,but not be helpful for the luminescence intensity *** addition,the relatively higher luminescence intensity in Eu（TTA）3 AA/NBR in comparison to that of Eu（TTA）3 AA/SiR might contribute to the interaction between nitrile group（–CN） in NBR and Eu-complexes,suggesting that the luminescence intensity of the composites also depended on the matrix characteristics.

关键词： rare-earth complex elastomer composites in situ reaction luminescence intensity self-polymerization

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Photoluminescence properties of Y_(0.75-x)Gd_xAl_(0.10)BO_3:Eu_(0.10)^(3+),0.05R^(3+)(R= Sc,Bi) (0.00 ≤ x ≤ 0.45)

引用

Chinese Physics B 2010年第6期19卷 248-253页

作者：李杰王育华董其铮刘吉地 Department of Material Science School of Physics Science and TechnologyLanzhou University

Y0.75-xGdxAl0.10BO3：Eu0.10^3＋,0.05R^3＋（R=Sc,Bi）（0.00≤x≤0.45）powder samples are prepared by solid-state reaction and their luminescence properties are investigated. With the replacement of Y^3＋ ions by Sc^3＋（or Bi^3＋）and Gd^3＋ ions in （Y,Al）BO3：Eu,the intensities of emission at 254 and 147 nm are remarkably improved, because Sc^3＋ inos can absorb UV light and transfer the energy to Eu^3＋ ions efficiently. Moreover, Gd^3＋ and Bi^3＋ ions act as an intermediate ＂bridge＂ between the sensitizer and the activator （Eu^3＋） in energy transfer to produce light in the （Y, Gd）BO3：Bi^3＋, Eu^3＋ system more effectively. After doping an appropriate concentration of Gd^3＋ into Y0.50Gd0.25Al0.10BO3：Eu0.01^3＋,Bi0.05^3＋,the emission intensity reaches its maximum, which is nearly 110% compared with the red commercial phosphor （Y,Gd）BO3：Eu and better chromaticity coordinates （0.650, 0.350） are obtained.

关键词： Sc^3+ Bi^3+ Gd^3+ luminescence intensity chromaticity

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Porosity Determination Equation for Porous Silicon

引用

Journal of Semiconductors 2001年第7期22卷 817-820页

作者：廉德亮谢国伟深圳大学信息工程学院EDA中心深圳518060 香港浸会大学物理系

Through the studying of the carriers moving of the porous and the definition of S BET ,the equation of the relationship among the porosity,the current density and the etching speed can be ***,it is shown that for porous silicon made from p type silicon,there is a universal relationship,it is possible to determine the change in porosity with respect to etching under a set etching current *** relationship is checked against experimental data from several reports on these etching parameters,and they confirm the validity.

关键词： porosity porous silicon luminescence intensity

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Multiplexing Using Upconversion Nanoparticles With Tunable P-I Relationship

Multiplexing Using Upconversion Nanoparticles With Tunable P...

引用

第十一届全国化学生物学学术会议

作者： Xin-Yu Chen Yu-Yang Gu Wei Feng Fu-You Li Department of Chemistry Fudan University

Optical multiplexing technology is a powerful means for people to acquire and edit a large amount of information efficiently, which is valuable for multi-target high throughput analysis in biological systems. Each optical parameter can be called a dimension. The emergence of a new dimension can make the information carrying capacity increase exponentially. Here, we demonstrate that the specific relationship（P-I relationship） between luminescence intensity and power density in the corresponding band of rare earth luminescence center can be modified with rare earth doping concentration. Thus, a new dimension has been established. The P-I relationship is only related to the material itself, which can avoid the errors caused by external factors such as the application environment and testing conditions. Moreover, the test can be completed with a commonly used fluorometer or fluorescent imaging system and there is no need for complex or expensive accessories.

关键词： multiplexing UCNP power density luminescence intensity

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：