Heptamethine cyanine dye-based functionalized recyclable flexible cotton fabric platform for the colorimetric and real-time ultrasensitive detection of gaseous BF3. (November 2022)

• Record Type: Journal Article
• Authors: Shen, Ao; Hao, Xiaohui; Zhang, Lifeng; Du, Man; Li, Mengwen; Yuan, Jiaxin; Du, Xiaoyu; Ma, Shufeng; Zhao, Yongwei; Hou, Lala; Li, Ziqi; Yang, Yunxu
• Is Part Of: Dyes and pigments. Volume 207(2022)
• Publication Date: 2022-11
• Subjects: BF3 -- Heptamethine cyanine dye -- Visual monitoring -- Quantitative determination -- Smartphone platform; Dyes and dyeing -- Periodicals; Pigments -- Periodicals; 667.2
• DOI: 10.1016/j.dyepig.2022.110674
• Languages: English
• ISSNs: 0143-7208

Abstract

Abstract: In this paper, a near infrared heptamethine cyanine dye of BK-Cy for boron trifluoride (BF3 ) detection was developed based on the Lewis acid-base reaction mechanism. BF3 bounded to the diphenylamine group in the middle of the heptamethine backbone structure forming Lewis acid-base complexes with decreasing fluorescence at λem = 830 nm (λex = 780 nm) and increased absorbance between 500 and 700 nm, making obvious color changes from light green to dark blue. BK-Cy showed excellent properties including rapid response (<1 min), lowest detection limit (1.73 nM), excellent linearity (R 2 = 0.9903) and specific selectivity. Meanwhile, a functionalized recyclable flexible cotton fabric platform of BK-Cy @cotton was fabricated and assembled with a smartphone to form a portable detecting platform to monitor the color changes of BK-Cy for quantitative BF3 detecting in gas phase under visible light. The real-time visualization of the remodeling BK-Cy @cotton platform from BK-Cy through dynamic covalent bonding was completely recyclable, environmentally friendly and had the possibility for future practicability applications. Graphical abstract: Image 1 Highlights: A BF3 probe based on Cyanine dyes was designed and synthesized. The BK-Cy@cotton was completely recyclable, environmentally friendly. Smartphone analysis platform can quantitative detection of BF3 gas by visual color changes.