由含吡啶环的共轭聚合物构成的pH响应型荧光化学传感器。

pH-responsive fluorescence chemical sensor constituted by conjugated polymers containing pyridine rings.

作者信息

Adachi Naoya, Kaneko Yuki, Sekiguchi Kazuki, Sugiyama Hiroki, Sugeno Masafumi

机构信息

Division of Liberal Arts, School of Science and Engineering, Tokyo Denki University, Hatoyama, Hiki-gun, Saitama, 350-0394, Japan.

Division of Science, School of Science and Engineering, Tokyo Denki University, Hatoyama, Hiki-gun, Saitama, 350-0394, Japan.

出版信息

Luminescence. 2015 Dec;30(8):1308-12. doi: 10.1002/bio.2898. Epub 2015 Mar 31.

DOI:10.1002/bio.2898

PMID:25828634

Abstract

Poly(p-pyridinium phenylene ethynylene)s (PPyPE) functionalized with alternating donor-acceptor repeat units were synthesized by a Pd-catalyzed Sonogashira coupling reaction between diethynyl monomer and di-iodopyridine for use as a pH-responsive fluorescence chemical sensor. The synthesized PPyPE, containing pyridine units, was characterized by FT-IR, (1)H and (13)C NMR, UV-visible and fluorescence spectroscopies. We investigated the relationship between changes of optical properties and protonation/deprotonation of PPyPE containing pyridine units in solution. Addition of HCl decreased and red-shifted the fluorescence intensity of the conjugated polymers that contained pyridine rings; fluorescence intensity of the polymers increased upon addition of NaOH solution. The synthesized PPyPE was found to be an effective and reusable chemical sensor for pH sensing.

摘要

通过二乙炔基单体与二碘吡啶之间的钯催化Sonogashira偶联反应合成了具有交替供体-受体重复单元的聚（对吡啶基亚苯乙炔）（PPyPE），用作pH响应荧光化学传感器。合成的含有吡啶单元的PPyPE通过傅里叶变换红外光谱（FT-IR）、氢核磁共振（¹H NMR）、碳核磁共振（¹³C NMR）、紫外可见光谱和荧光光谱进行了表征。我们研究了溶液中含吡啶单元的PPyPE的光学性质变化与质子化/去质子化之间的关系。加入盐酸会降低含吡啶环共轭聚合物的荧光强度并使其红移；加入氢氧化钠溶液后聚合物的荧光强度增加。结果发现，合成的PPyPE是一种用于pH传感的有效且可重复使用的化学传感器。