Oligonucleotide-mediated aggregation of a cationic conjugated polymer for fluorescent detection of mercury ions in an aqueous medium

被引：7

作者：

Kwon, Na Young ^{[1
,2
]}

Jang, Geunseok ^{[1
]}

Kim, Jongho ^{[1
]}

Kim, Daigeun ^{[1
]}

Lee, Taek Seung ^{[1
]}

机构：

[1] Chungnam Natl Univ, Organ & Optoelect Mat Lab, Dept Adv Organ Mat & Text Syst Engn, Taejon 305764, South Korea

[2] LG Innotek, Component R&D Ctr, Ansan 426791, Gyeonggi Do, South Korea

来源：

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY | 2013年 / 51卷 / 11期

基金：

新加坡国家研究基金会;

关键词：

conjugated polymers; fluorescence; mercury ion; polythymidine; sensors; DNA CONCENTRATION DETERMINATION; INTERPOLYELECTROLYTE COMPLEXES; OPTICAL-DETECTION; LABEL-FREE; ELECTROCHEMICAL SENSOR; MOLECULAR BEACON; CHEMICAL SENSORS; ENERGY-TRANSFER; QUANTUM YIELD; BASE-PAIRS;

D O I：

10.1002/pola.26624

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A cationically charged conjugated polymer (P2) functionalized with quaternary ammonium salt was newly synthesized via Suzuki cross-coupling polymerization. The functionalized P2 features different fluorescence colors according to its phases (blue emission in solution and green emission as asolid) which is caused by intramolecular and intermolecular exciton migration, respectively. The use of P2 as a novel fluorescent sensing platform is demonstrated for mercury ion detection. The detection of mercury ions is accomplished in two steps: (1) the cationic, blue-emitting P2 absorbs an anionic oligonucleotide, polythymidine (PT) via electrostatic interaction to form a complex with green emission due to aggregation between the two species; (2) the addition of mercury ions to the complex produces a new complex of PT-Hg2+ via more favorable specific interaction, resulting in the isolation of P2 and the consequent recovery of blue fluorescence of P2. It suggests that this detection system has high selectivity and sensitivity down to the approximate to 107 M level, even in mixtures of metal ions. (c) 2013 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2013, 51, 2393-2400

引用

页码：2393 / 2400

页数：8