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首页> 外文期刊>Applied Surface Science >Molecular engineered silica surfaces with an assembled anthracene monolayer as a fluorescent sensor for organic copper(II) salts
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Molecular engineered silica surfaces with an assembled anthracene monolayer as a fluorescent sensor for organic copper(II) salts

机译：分子工程二氧化硅表面具有组装的蒽单层，可作为有机铜（II）盐的荧光传感器

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摘要

A novel fluorescence film has been fabricated by covalently coupling anthracene on a glass plate surface via a long flexible "Y" type spacer. Fluorescence measurement demonstrated that the emission of the film is dominated by anthracene monomer emission, and the emission can be selectively quenched by organic copper(II) salts including copper acetate, copper citrate, copper tartrate, etc. Addition of inorganic copper(II) salts like Cu(NO_3)_2, CuSO_4, CuCl_2, etc., however, has little effect upon the emission of the film. This observation was explained by considering the screening effect of the spacer layer, or spacer clusters, or even spacers adopting compact coiled conformation. Different from the reported fluorescence films with similar structures, immobilization of anthracene via a "Y" type spacer on a glass plate surface makes the fluorophore moieties exist in two different states, that is some of them were embedded within the spacer structures, and some of them might stay out of the structures. This hypothesis has been confirmed by model system, solvent effect and quenching mechanism studies. The emission of the film is sensitive to the presence of organic copper(II) salts like copper acetate. The response of the film to copper acetate is fully reversible. Presence of other inorganic salts, including Pb(Ac)_2, Cd(Ac)_2, Zn(Ac)_2, and inorganic copper(II) salts has little effect upon the sensing performance of the film to copper acetate.
机译：通过经由长的柔性“ Y”型间隔物在玻璃板表面上共价偶联蒽，已经制备了新颖的荧光膜。荧光测量表明，薄膜的发射主要由蒽单体发射决定，并且该发射可以被有机铜（II）盐（包括乙酸铜，柠檬酸铜，酒石酸铜等）选择性淬灭。添加无机铜（II）盐像Cu（NO_3）_2，CuSO_4，CuCl_2等，对薄膜的发射几乎没有影响。通过考虑间隔层，间隔簇或什至采用紧凑盘绕构象的间隔的屏蔽效应来解释该观察结果。与报道的具有相似结构的荧光膜不同，蒽通过“ Y”型间隔物固定在玻璃板表面上使荧光团部分以两种不同的状态存在，即其中一些嵌入在间隔物结构中，而一些他们可能会离开结构。该假设已通过模型系统，溶剂效应和淬灭机理研究得到证实。薄膜的发射对有机铜（II）盐（如乙酸铜）的存在敏感。膜对乙酸铜的响应是完全可逆的。其他无机盐的存在，包括Pb（Ac）_2，Cd（Ac）_2，Zn（Ac）_2和无机铜（II）盐，对薄膜对乙酸铜的传感性能影响很小。

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