Synthesis of novel coumarin containing conjugated fluorescent polymers by Suzuki cross-coupling reactions and their chemosensing studies for iron and mercury ions

被引：18

作者：

Bhaumick, Prabhas ^{[1
]}

Jana, Asim ^{[1
]}

Choudhury, Lokman H. ^{[1
]}

机构：

[1] Indian Inst Technol Patna, Dept Chem, Patna 801106, Bihar, India

来源：

POLYMER | 2021年 / 218卷

关键词：

Pd-catalysis; Highly fluorescent coumarin containing conjugated copolymers; Selective turn-off sensor for Hg2+ and Fe2+/Fe3+; Suzuki coupling; Boronic acid;

D O I：

10.1016/j.polymer.2021.123415

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Conjugated fluorescent polymers are very useful materials for chemical and biochemical sensors. Herein we report the synthesis of four novel conjugated coumarin-containing fluorescent co-polymers (P1-P4) by palladium catalyzed Suzuki-Miyaura cross-coupling reaction. 4-Methyl/phenyl coumarin ditriflates and diboronic acids such as benzene-1,4-diboronic acid and 9,9-dioctylfluorene-2,7-diboronic acid were used as coupling partners. All the polymers were well-characterized using NMR and gel permeation chromatography. TGA studies revealed that these polymers are stable over 300 degrees C. The photophysical properties of these novel polymers were studied by UV-Vis and fluorescence spectroscopy. Among these four polymers, polymer P3 having 4-methylcoumarin and dioctylfluorene as alternating monomers showed intense fluorescence with 0.73 quantum yield in the DMF medium. Polymer P3 was also found as selective fluorescence "turned-off" chemosensor for the detection of Hg(II) and Fe(II)/Fe(III) ions over the other metal ions dissolved in water.

引用

页数：12

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