A highly sensitive naked-eye fluorescent probe for trace hydrazine based on 'C-CN' bond cleavage. Issue 18 (16th August 2018)

• Record Type: Journal Article
• Authors: Xu, Hai; Huang, Zhen; Li, Yaqian; Gu, Biao; Zhou, Zile; Xie, Ruihua; Pang, Xiao; Li, Haitao; Zhang, Youyu
• Is Part Of: Analyst. Volume 143:Issue 18(2018)
• Page Start: 4354
• Page End: 4358
• Publication Date: 2018-08-16
• Subjects: Chemistry, Analytic -- Periodicals; 543
• DOI: 10.1039/c8an01161c
• Languages: English
• ISSNs: 0003-2654

Abstract

Abstract : The 'C–CN' bond cleavage was applied to the recognition of N2 H4 for the first time; the obvious change in color could be used for "naked-eye" detection; the corresponding detection limit was found to be 5.81 × 10 −8 M (1.65 ppb); the probe could be applied for N2 H4 detection in real water samples. Abstract : In this work, a colorimetric and ratiometric fluorescent probe, 2, 3-bis((( E )-4-(diethylamino)-2-hydroxybenzylidene)amino)maleonitrile (DHM ), was developed based on N2 H4 -induced bond cleavage. Two cyanide groups ofDHM were applied to sense hydrazine (N2 H4 ) for the first time, which was demonstrated using 1 H NMR and HRMS spectra. The specific 'C-CN' bond cleavage induced by N2 H4 showed an excellent fluorescence ratiometric behavior and a visible colorimetric change from purple to yellow. Meanwhile, it showed a low detection limit of 58.1 nM (1.65 ppb), which is far below the safety level (10 ppb) set by the U.S. EPA. Moreover, the probe was successfully employed for the quantitative detection toward N2 H4 in real water samples.