阳离子荧光敏感器的器件化问题研究

doi:10.7517/j.issn.1674-0475.2002.02.118

影像科学与光化学 ›› 2002, Vol. 20 ›› Issue (2): 118-125.DOI: 10.7517/j.issn.1674-0475.2002.02.118

阳离子荧光敏感器的器件化问题研究

王辉¹, 梅明华², 房喻¹, 张晓宏², 吴世康²

1. 陕西师范大学, 化学系, 西安, 710062;
2. 中国科学院, 理化技术研究所, 北京, 100101

收稿日期:2001-08-05 修回日期:2001-11-16 出版日期:2002-03-23 发布日期:2002-03-23
通讯作者: 吴世康
基金资助:
973重大研究资助项目(G2000078100)

A STUDY ON THE DEVICE PROBLEM OF CATIONIC FLUORESCENCE SENSOR

WANG Hui¹, MEI Ming-hua², FANG Yu¹, ZHANG Xiao-hong², WU Shi-kang ²

1.Department of Chemistry, The Shan Xi Normal University, Xi'an 710062, P.R.China;
2. Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100101, P.R.China

Received:2001-08-05 Revised:2001-11-16 Online:2002-03-23 Published:2002-03-23

摘要/Abstract

摘要： 通过对石英玻片表面修饰, 制作了联有多氨基链萘基的超薄膜荧光敏感器件, 研究了它在镍、铜等金属离子水溶液及有机溶剂中的荧光猝灭现象. 发现其荧光光谱无论在水或其他有机溶剂中都存在着单体和激基缔合物(ex-cimer)的发射峰, 当处于镍离子水溶液中时, 其单体峰随离子浓度的增大出现了先增强后减弱的现象, 而激基缔合物的发光峰则仅略有减弱但变化不大. 在铜离子水溶液中其荧光的变化情况和镍离子有所不同, 对单体荧光只能观察到强度减弱的趋势, 而激基缔合物则变化不大. 比较了未联结的敏感器化合物分子在有机溶剂中荧光被铜离子猝灭的行为, 发现与其在器件表面时有很大的差别, 表明其分子结构和构象也有很大的不同.

关键词: 表面修饰, 阳离子识别, 荧光猝灭, 分子器件, 光诱导电子转移

Abstract: The device of an ultra thin film fluorescence sensor with polyamino chain naphthyl group modified onto a quartz plate surface has been prepared.The fluorescence quenching of the sensor by different metallic cations was studied in both aqueous and organic solvents.It was found that in the fluorescence spectrum of device either in aqueous or in organic solvents there were both monomer and excimer emission peaks.When it was dipped in the aqueous solution of nickel cation,the intensity of the monomer peak increased in the region of low concentration of nickel cation added,then,decreased in the region of high concentration.However,the intensity of excimer emission just decreased with the change of cationic concentration.In the copper ionic aqueous solution,the tendency of fluorescence changing of device was different to that of nickel ion.Only a decreasing tendency was observed for the monomer peak emission while the copper ion concentration increased.And for the excimer emission there was no big change observed.The fluorescence quenching of molecule of studied sensor dissolved in organic solvent was different with that when it was attached on the surface of device.It indicated that the configuration and the structure of molecule attached on the surface of device compared with the molecule in solution were different evidently.

Key words: surface modification, cationic recognition, fluorescence quenching, molecular device, photoinduced electron transfer

中图分类号:

O644

王辉, 梅明华, 房喻, 张晓宏, 吴世康. 阳离子荧光敏感器的器件化问题研究[J]. 影像科学与光化学, 2002, 20(2): 118-125.

WANG Hui, MEI Ming-hua, FANG Yu, ZHANG Xiao-hong, WU Shi-kang . A STUDY ON THE DEVICE PROBLEM OF CATIONIC FLUORESCENCE SENSOR[J]. Imaging Science and Photochemistry, 2002, 20(2): 118-125.

参考文献

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阳离子荧光敏感器的器件化问题研究

A STUDY ON THE DEVICE PROBLEM OF CATIONIC FLUORESCENCE SENSOR

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