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Preparation of monolayer-assembled fluorescent film and its sensing performances to hidden nitroaromatic explosives 被引量:1
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作者 LI HuiHui LU FengTing ZHANG ShuJuan HE Gang FANG Yu 《中国科学通报:英文版》 SCIE CAS 2008年第11期1644-1650,共7页
分核化学上经由包含三伸乙基四氨(TETA ) 的分隔符以一种单层方式在玻璃板表面上被装配子单元。这部电影的荧光排放对 nitroaromatic 化合物(NAC ) 的踪迹数量的存在敏感,这被表明了蒸汽。是在现在的工作发现了, pyrene-functionaliz... 分核化学上经由包含三伸乙基四氨(TETA ) 的分隔符以一种单层方式在玻璃板表面上被装配子单元。这部电影的荧光排放对 nitroaromatic 化合物(NAC ) 的踪迹数量的存在敏感,这被表明了蒸汽。是在现在的工作发现了, pyrene-functionalized 电影的反应选择取决于分隔符,给定的 NAC 的蒸汽压力,和 quencher 尺寸的长度。这部电影显示出更快的反应到那些熄灭有更高的蒸汽压力和更小的尺寸的 ers。与更短的分隔符作比较到这部电影,有更长灵活的分隔符的现在的电影显示出更慢的回答到 NAC,而是更高的选择到 quencher 尺寸。另外,察觉在蒸汽阶段, 2,4,6 强烈炸药(TNT ) 和 2,4-dinitrotoluene (DNT ) 限制到普通炸药,是 7.14 × 1 0 <SUP>&#8722;12</SUP> 和 5.49 × 1 0 <SUP>&#8722;11</SUP> g · m L <SUP>&#8722;1</SUP>, 分别地。进一步的考试显示察觉到的进程是充分可逆的,并且象苯,甲苯,乙醇,和香水那样的那些普通干扰的蒸汽在这部电影的察觉到的表演之上有小效果。 展开更多
关键词 荧光薄膜 传感性能 单层自组装薄膜 硝基芳香物族化合物炸药
表面增强荧光研究进展 预览 被引量:13
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作者 吕凤婷 郑海荣 房喻 《化学进展》 SCIE CAS CSCD 北大核心 2007年第2期 256-266,共11页
本文系统地介绍了金属表面增强荧光现象、产生机理及其应用。粗糙金属和超薄光滑金属表面均可表现出荧光增强效应,但这两种表面增强荧光产生的机理不同,所发出的荧光性质也不同。粗糙金属表面增强荧光的主要原因被认为是加快了处于基... 本文系统地介绍了金属表面增强荧光现象、产生机理及其应用。粗糙金属和超薄光滑金属表面均可表现出荧光增强效应,但这两种表面增强荧光产生的机理不同,所发出的荧光性质也不同。粗糙金属表面增强荧光的主要原因被认为是加快了处于基质表面附近的荧光物种的辐射衰减过程,而超薄光滑金属表面增强荧光则是激发态荧光物种与金属表面的等离子体耦合共振的结果。与粗糙金属表面增强荧光不同,超薄光滑金属表面增强荧光具有突出的方向性。金属表面增强荧光已经开始在DNA无损检测、荧光共振能量转移免疫分析等领域获得重要应用。 展开更多
关键词 金属增强荧光 辐射衰减工程 辐射等离子体模型 表面等离子体耦合发射
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Immobilization of pyrene on quartz plate surface via a flexible long spacer and its sensing properties to dicarboxylic acids 被引量:1
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作者 GAO Lining FANG Yu Lü Fengting DING Liping 《中国科学:化学英文版》 SCIE EI CAS 2004年第3期240-250,共11页
A novel photo-induced luminescence film has been prepared by immobilizing pyrene on quartz plate surface via a flexible long spacer, 1,3-diaminopropane and 3-glycidoxypropyl trimethoxysilane. The film shows combined m... A novel photo-induced luminescence film has been prepared by immobilizing pyrene on quartz plate surface via a flexible long spacer, 1,3-diaminopropane and 3-glycidoxypropyl trimethoxysilane. The film shows combined monomer and excimer emission of pyrene in both wet and dry states. Steady-state and time-resolved fluorescence emission measurements demonstrated that the excimer emission mainly came from direct excitation of ground state dimers, and/or monomers in aggregated state. Classical Birks' scheme plays little role in the formation of the excimers. The structures of the excimers formed during the excitation are complex. Both 'standard excimer' of sandwich-like fully overlapped structure and 'distorted excimer' of partially overlapped structure exist in the excited state of the fluorophore. The emission of the film is sensitive to the presence of dicarboxylic acids, including ethanedioic acid, malonic acid, succinic acid, etc. The emission in the monomer and excimer region increases along with increasing the concentration of the dicarboxylic acids. The time needed for the emission to reach equilibrium depends on the nature of the acids. It has been shown that the longer the chain length of the acids, the more the time needed. This observation is explained by considering the conformational reorganization of the immobilized pyrene due to insertion of the dicarboxylic acids into the space between neighboring spacers. Experimental results from similar studies using formic acid and acetic acid are in support of this explanation. Furthermore, the response of the film to dicarboxylic acids is reversible. 展开更多
关键词 pyrene fluorescence dicarboxylic acid SENSING property.
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