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A highly sensitive “ON–OFF” optical sensor for the selective detection of cyanide ions in 100% aqueous solutions based on hydrogen bonding and water assisted aggregation induced emission

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Abstract

Nanoparticles N,N′-(pyridine-2,6-diyl)bis(2-(2,4-dichlorophenoxy)acetamide) (1) exhibited an “on–off” emission response toward cyanide (CN) ions in 100% aqueous solutions based on AIE features. AIEgen 1 is an easy-to-use probe that exhibits rapid response (5 s), extremely high sensitivity (limit of detection = 8.2 nM) and excellent selectivity. The sensing performance of CN through a test kit and bitter seed solutions was good. The experimental results show that compound 1 is planar and can self-assemble into a supramolecular system and show blue emission. Then, CN destroys both hydrogen bonds and the aggregates of 1 and quenches the emission. This process is reversible upon the addition of HCl solution.

Graphical abstract: A highly sensitive “ON–OFF” optical sensor for the selective detection of cyanide ions in 100% aqueous solutions based on hydrogen bonding and water assisted aggregation induced emission

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Supplementary files

Article information


Submitted
09 Apr 2020
Accepted
25 Jun 2020
First published
26 Jun 2020

Chem. Commun., 2020, Advance Article
Article type
Communication

A highly sensitive “ON–OFF” optical sensor for the selective detection of cyanide ions in 100% aqueous solutions based on hydrogen bonding and water assisted aggregation induced emission

R. Nazarian, H. R. Darabi, K. Aghapoor, R. Firouzi and H. Sayahi, Chem. Commun., 2020, Advance Article , DOI: 10.1039/D0CC02510K

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