Issue 16, 2016

Lucigenin/Co(tryptophan)2 complex bifunctionalized graphene oxide: facile synthesis and unique chemiluminescence

Abstract

In this manuscript, lucigenin (Luc) and Co2+ complex bifunctionalized graphene oxide hybrids (Co(Trp)2/Luc/GO) were synthesized via a facile and simple strategy by virtue of π–π stacking and electrostatic interaction. The as-prepared Co(Trp)2/Luc/GO hybrids exhibited good stability, water-solubility and excellent CL activity when reacted with H2O2, which was more than 30 times higher than Luc/GO. The CL mechanism between Co(Trp)2/Luc/GO and H2O2 has been proposed to be due to the fact that Co2+ could facilitate the formation of HO˙, O2˙ and Co2+–HO2, accelerating lucigenin CL reaction. Moreover, it was also found that ascorbic acid could directly react with Co(Trp)2/Luc/GO to generate CL emission in the presence of dissolved oxygen. By virtue of Co(Trp)2/Luc/GO as a platform, a sensitive, selective, reagent-less and disposable CL sensor for the detection of ascorbic acid was developed. Ascorbic acid could be determined in the range of 5.0 × 10−7–1.0 × 10−3 M with a detection limit of 0.4 μM. This work reveals that catalyst Co(Trp)2 assembled on the surface of Luc/GO exhibits a unique catalytic effect on lucigenin CL reaction, which provides a new strategy for the synthesis of a lucigenin functionalized nanomaterial with high CL efficiency. The synthesized Co(Trp)2/Luc/GO may find more applications in the development of novel analytical methods.

Graphical abstract: Lucigenin/Co(tryptophan)2 complex bifunctionalized graphene oxide: facile synthesis and unique chemiluminescence

Supplementary files

Article information

Article type
Paper
Submitted
07 Jan 2016
Accepted
21 Mar 2016
First published
21 Mar 2016

J. Mater. Chem. C, 2016,4, 3477-3484

Lucigenin/Co(tryptophan)2 complex bifunctionalized graphene oxide: facile synthesis and unique chemiluminescence

Q. Li, F. Li, W. Shen, X. Liu and H. Cui, J. Mater. Chem. C, 2016, 4, 3477 DOI: 10.1039/C6TC00072J

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