TY - JOUR
T1 - Squaraine-hydrazine adducts for fast and colorimetric detection of aldehydes in aqueous media
AU - Liu, Taihong
AU - Yang, Lvjie
AU - Zhang, Jing
AU - Liu, Ke
AU - Ding, Liping
AU - Peng, Haonan
AU - Belfield, Kevin D.
AU - Fang, Yu
N1 - Funding Information:
This work was supported by the National Natural Science Foundation of China ( 21527802 , 21673133 , and 21820102005 ), 111 project (B14041), Program for Changjiang Scholars and Innovative Research Team in University ( IRT-14R33 ), the Fundamental Research Funds for the Central Universities ( GK201803024 ) and the Open Fund of Shaanxi Joint Laboratory of Graphene (Northwestern Polytechnical University, 2019SJLG-01 ). KDB acknowledges support from the National Science Foundation ( CHE-1726345 ).
Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2019/8/1
Y1 - 2019/8/1
N2 - Capitalizing on the nucleophilic addition of hydrazine toward the central cyclobutenyl core and affinity of aldehydes to hydrazine group, two water-soluble squaraine dyes (SQOH and SQPY) were synthesized as sensitive colorimetric and fluorescent chemosensors for aldehydes. The color change from blue to colorless and back to blue these sensors underwent was readily observed, even by the naked eyes. The response was fast (less than 1 s) and the detection limit for formaldehyde as an example was about 60 μM. In contrast to the previous nucleophilic attack to squaraines and the other amine references studied, this work underwent a whole ON-OFF-ON sensing circle based on the characteristics of hydrazine. Meanwhile, the different photophysical properties of the two squaraines related to their different structures were also demonstrated. Importantly, a possible sensing mechanism is proposed suggesting these types of dyes hold great potential in the area of rapid, sensitive, and convenient detection of aldehydes.
AB - Capitalizing on the nucleophilic addition of hydrazine toward the central cyclobutenyl core and affinity of aldehydes to hydrazine group, two water-soluble squaraine dyes (SQOH and SQPY) were synthesized as sensitive colorimetric and fluorescent chemosensors for aldehydes. The color change from blue to colorless and back to blue these sensors underwent was readily observed, even by the naked eyes. The response was fast (less than 1 s) and the detection limit for formaldehyde as an example was about 60 μM. In contrast to the previous nucleophilic attack to squaraines and the other amine references studied, this work underwent a whole ON-OFF-ON sensing circle based on the characteristics of hydrazine. Meanwhile, the different photophysical properties of the two squaraines related to their different structures were also demonstrated. Importantly, a possible sensing mechanism is proposed suggesting these types of dyes hold great potential in the area of rapid, sensitive, and convenient detection of aldehydes.
KW - Aggregation
KW - Aldehydes detection
KW - Chemosensors
KW - Colorimetric and fluorescence
KW - Squaraine dyes
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U2 - 10.1016/j.snb.2019.04.138
DO - 10.1016/j.snb.2019.04.138
M3 - Article
AN - SCOPUS:85064965803
SN - 0925-4005
VL - 292
SP - 88
EP - 93
JO - Sensors and Actuators, B: Chemical
JF - Sensors and Actuators, B: Chemical
ER -