Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.



Selective and Sensitive Detection of Formaldehyde by ZIF-90-LW via Aza-Cope Rearrangement

Abstract

Formaldehyde (FA), as one of the simplest reactive carbonyl species (RCS), is more widely known as an environmental toxin and carcinogen. In this work, a new ZIF-90 type material (ZIF-90-LW) was synthesized and investigated, of which combined two strategies of “2-aza-Cope rearrangement” and “MOFs structure” by the combination of the pre-functionalized 2-allylaminoimidazole ligand and Zn2+ salt under solvothermal conditions. From this, the hurdle in selectivity of other carbonyl compounds (RCS) would be averted even though their similar electrophilic reactivities as FA, and a prominent fluorescence turn-on type signaling was realized by the 2-aza-Cope rearrangement mechanism. A good linear relationship (R2 = 0.9943) was obtained by fitting the fluorescence intensity towards FA from 0 to 25 mM, and the detection limit of ZIF-90-LW to FA was 0.67 ppM. In addition, it also showed potentially useful sensing ability for the detection of FA in both liquid and gas phase, and might therefore be used to rapidly dectet FA in a response time of 28 s in liquid phase, while 20 s in gas phase. All the above features clearly demonstrate that ZIF-90-LW has the great potential to sensitive and selective recognize FA in the environment.

Back to tab navigation

Supplementary files

Article information


Submitted
08 Mar 2020
Accepted
19 Jun 2020
First published
25 Jun 2020

Anal. Methods, 2020, Accepted Manuscript
Article type
Paper

Selective and Sensitive Detection of Formaldehyde by ZIF-90-LW via Aza-Cope Rearrangement

M. Li, A. Shen, Y. Liang, H. Zhen, X. Hao, X. Liu, X. Sun and Y. Yang, Anal. Methods, 2020, Accepted Manuscript , DOI: 10.1039/D0AY00493F

Social activity

Search articles by author

Spotlight

Advertisements