Issue 15, 2016

In situ bifunctionalized carbon dots with boronic acid and amino groups for ultrasensitive dopamine detection

Abstract

In this paper, in situ bifunctionalized carbon dots (B-N-CDs) with boronic acid and amino groups were prepared by a simple hydrothermal method using 3-aminophenylboronic acid as the sole precursor. The high quantum yield of B-N-CDs is as high as 67%, leading to fluorescence emission observed even under daylight excitation. The B-N-CDs exhibited obvious fluorescence enhancement to trace dopamine in the range of 1 pM to 1 μM with a detection limit of 0.1 pM (S/N = 3), which is two orders of magnitude more sensitive than that of present fluorescent sensors. The excellent sensing performance is based on the interaction of two functional groups with DA. This dopamine probe owned advantages of high sensitivity, superior selectivity, good reproducibility and simplicity. Moreover, the analytical reliability of this dopamine sensor was demonstrated in human serum samples.

Graphical abstract: In situ bifunctionalized carbon dots with boronic acid and amino groups for ultrasensitive dopamine detection

Supplementary files

Article information

Article type
Paper
Submitted
16 Jan 2016
Accepted
15 Mar 2016
First published
16 Mar 2016

Anal. Methods, 2016,8, 3236-3241

In situ bifunctionalized carbon dots with boronic acid and amino groups for ultrasensitive dopamine detection

X. Liu, X. Hu, Z. Xie, P. Chen, X. Sun, J. Yan and S. Zhou, Anal. Methods, 2016, 8, 3236 DOI: 10.1039/C6AY00142D

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