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

Release time:2021-07-23  Hits:

• DOI number:10.1039/c6tc00072j
• Journal:J Mater Chem C
• 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.
• Co-author:李芳,沈雯,刘向阳
• First Author:李琪
• Indexed by:Journal paper
• Correspondence Author:Hua Cui
• Document Code:000374785300014
• Discipline:Natural Science
• Document Type:J
• Volume:4
• Issue:16
• Page Number:3477-3484
• ISSN No.:2050-7526
• Translation or Not:no
• Date of Publication:2015-11-30
• Included Journals:SCI
• Links to published journals:https://pubs.rsc.org/en/content/articlehtml/2016/tc/c6tc00072j