Achieving dual-responsive fluorescence switching towards mechanical force and volatile acid vapor based on D-A type diphenylamine functionalized quinoxaline derivatives. (December 2021)

• Record Type: Journal Article
• Authors: Zhao, Feng; Sun, Ting; Wang, Yu; Zhan, Yong; WenjunYang,
• Is Part Of: Dyes and pigments. Volume 196(2022)
• Publication Date: 2021-12
• Subjects: Mechanochromism -- Acidochromism -- Quinoxaline -- Protonation effect -- Volatile acid vapor; Dyes and dyeing -- Periodicals; Pigments -- Periodicals; 667.2
• DOI: 10.1016/j.dyepig.2021.109763
• Languages: English
• ISSNs: 0143-7208

Abstract

Abstract: New D-A type diphenylamine modified quinoxaline derivatives DPA-DPQ and 2DPA-DPQ have been synthesized by the classical nucleophilic substitution reaction. Two compounds exhibit obvious solvatochromism in different polarities of the solvents. Spectral change and theoretical calculation indicate the presence of D-A structures. Two fluorophores also show interesting dual-stimuli responsive properties. The emission wavelengths and intensities of DPA-DPQ and 2DPA-DPQ can be switched in response to not only external force but also the protonation effect with rapid response times. The dual-response performances endow these molecules with practical applications in stress and acid/base fluorescence sensing. Graphical abstract: Image 1 Highlights: New D-A type diphenylamine modified quinoxaline derivatives DPA-DPQ and 2DPA-DPQ have been synthesized. Two fluorophores show interesting dual-stimuli responsive properties. The films constructed by DPA-DPQ and 2DPA-DPQ act as sensing materials to quantitatively detect acid vapors.