Using Diazotization Reaction to Develop Portable Liquid-Crystal-Based Sensors for Nitrite Detection

doi:10.1021/acsomega.0c01233

淡江大學機構典藏 > 理學院 > 化學學系暨研究所 > 期刊論文 > Item 987654321/118707

請使用永久網址來引用或連結此文件: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/118707

題名:	Using Diazotization Reaction to Develop Portable Liquid-Crystal-Based Sensors for Nitrite Detection
作者:	Ho, T. T.;Lan, Y.-H.;Huang, J.-W.;Chang, R.-R.;Chen, C.-H.
日期:	2020-05-08
上傳時間:	2020-06-01 12:14:45 (UTC+8)
出版者:	American Chemical Society
摘要:	A liquid-crystal (LC)-based sensor for detecting nitrite in aqueous solutions was developed using a diazotization reaction as the sensing mechanism. First, tetradecyl 4-aminobenzoate (14CBA) was synthesized and doped into a nematic LC, i.e., 4-cyano-4′-pentylbiphenyl (5CB). When the LC mixture was cast on a glass substrate and then immersed into an aqueous solution without nitrite, the orientation of LC was planar and the LC image was bright. In the presence of nitrite, it reacted with alkylanilines to give corresponding diazonium ions with a positive charge, which aligned at the LC/aqueous interface to cause homeotropic orientation of LC. As a result, a bright-to-dark transition of the LC image was observed. The limit of detection (LOD) of this system for nitrite is 25 μM with high selectivity. In addition, this system can work in environmental water samples such as tap water and pond water. Finally, we demonstrated that the optical signals of LC can be measured and recorded using a built-in digital camera of a smartphone, suggesting the portability of this system for on-site applications.
關聯:	ACS Omega 5(20), 11809–11816
DOI:	10.1021/acsomega.0c01233
顯示於類別:	[化學學系暨研究所] 期刊論文

文件中的檔案:

檔案	描述	大小	格式	瀏覽次數
index.html		0Kb	HTML	172	檢視/開啟
Using Diazotization Reaction to Develop Portable Liquid-Crystal-Based Sensors for Nitrite Detection.pdf		4396Kb	Adobe PDF	3	檢視/開啟

在機構典藏中所有的資料項目都受到原著作權保護.

TAIR相關文章

資料載入中.....