Adachi Naoya, Kaneko Yuki, Sekiguchi Kazuki, Sugiyama Hiroki, Sugeno Masafumi
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.
Luminescence. 2015 Dec;30(8):1308-12. doi: 10.1002/bio.2898. Epub 2015 Mar 31.
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.
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。
