Thymine-covalently decorated, AIEE-type conjugated polymer as fluorescence turn-on probe for aqueous Hg2+
| Autor: | Hongyu Mi, Wei Shi, Zhengfeng Xie, Linxian Xu, Yong Tian, Fudong Ma, Yonghai Hui, Xinhua Sun |
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| Rok vydání: | 2014 |
| Předmět: |
chemistry.chemical_classification
Aqueous solution Metal ions in aqueous solution Metals and Alloys Polymer Conjugated system Condensed Matter Physics Photochemistry Fluorescence Surfaces Coatings and Films Electronic Optical and Magnetic Materials Thymine chemistry.chemical_compound chemistry Covalent bond Materials Chemistry Click chemistry Organic chemistry Electrical and Electronic Engineering Instrumentation |
| Zdroj: | Sensors and Actuators B: Chemical. 198:395-401 |
| ISSN: | 0925-4005 |
| DOI: | 10.1016/j.snb.2014.03.090 |
| Popis: | A type of thymine (T)-covalently decorated conjugated polymer (P3) with the feature of aggregation-induced emission enhancement (AIEE) was successfully synthesized via Cu-catalyzed click reaction between the acetylene-substituted precursor polymer (P2) and 3′-azido-3′-deoxythymidine. Chemical structures of target polymers were verified by FT-IR and 1H NMR analyses. With the introduction of aqueous Hg2+, fluorescence of P3 in THF–water mixture (VTHF/Vwater = 7/3) (buffered with 5 mM citric acid–disodium hydrogen phosphate, pH = 7.4) displayed gradual enhancement. The AIEE effect was activated by the formation of intermolecular aggregates, which was induced by the formation of T–Hg–T complex between polymer chains. Other common metal ions brought very slight interference for P3's response of Hg2+, and the detection limit of Hg2+ reached ∼15.3 nM for such probing system. |
| Databáze: | OpenAIRE |
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