Polydiacetylenes carrying amino groups for colorimetric detection and identification of anionic surfactants
作者:Wanwisa Thongmalai、Thichamporn Eaidkong、Sasikarn Ampornpun、Radeemada Mungkarndee、Gamolwan Tumcharern、Mongkol Sukwattanasinitt、Sumrit Wacharasindhu
DOI:10.1039/c1jm12795k
日期:——
A series of diacetylene lipids carrying primary amine, secondary amine or ammonium head groups are prepared and converted to blue polydiacetylene (PDA) sols by UV irradiation. The blue to pink colorimetric transition of polymerized diacetylenes in the presence of anionic surfactants such as sodium dodecanoate (SDC), sodium docecyl sulphate (SDS), and sodium dodecyl benzene sulphate (SDBS) are observed by the naked eye at the micromolar concentration level while there is no change with cationic surfactants and little response with nonionic surfactants. An identification of common anionic surfactants can be accomplished based on a combination of the colorimetric pattern of structurally diverse PDAs using the principal component analysis technique. Moreover, PDA was successfully fabricated on filter paper and the colorimetric response of PDA embedded on the paper was investigated which allowed the direct colorimetric detection of anionic surfactants.
制备了一系列带有伯胺、仲胺或铵头基团的二乙炔脂质,并通过紫外线照射将其转化为蓝色聚二乙炔(PDA)溶胶。在十二酸钠(SDC)、十二烷基硫酸钠(SDS)和十二烷基苯硫酸钠(SDBS)等阴离子表面活性剂存在的情况下,肉眼可观察到聚合后的二乙炔在微摩尔浓度水平上由蓝色转变为粉红色,而阳离子表面活性剂则没有变化,非离子表面活性剂也几乎没有反应。利用主成分分析技术,结合不同结构的 PDA 的比色模式,可以识别常见的阴离子表面活性剂。此外,还成功地在滤纸上制作了 PDA,并研究了嵌入滤纸上的 PDA 的比色反应,从而可以直接比色检测阴离子表面活性剂。