title: β-Cyclodextrin non-covalently functionalized single-walled carbon nanotubes bridged by 3,4,9,10-perylene tetracarboxylic acid for ultrasensitive electrochemical sensing of 9-anthracenecarboxylic acid.
abstract: We report a simple and facile approach for the synthesis of β-cyclodextrin non-covalently functionalized single-walled carbon nanotubes bridged by 3,4,9,10-perylene tetracarboxylic acid (β-CD-PTCA-SWCNTs). Fourier transform infrared spectroscopy, transmission electron microscopy, thermogravimetric analysis, Raman spectroscopy and electrochemical methods were used to characterize the as-prepared functionalized SWCNTs. Furthermore, the β-CD-PTCA-SWCNTs were applied successfully to detect 9-anthracenecarboxylic acid (9-ACA, one derivative of polycyclic aromatic hydrocarbons) by electrochemical methods. The results show that the oxidation peak current of 9-ACA on β-CD-PTCA-SWCNTs modified glassy carbon (GC) electrode is 4.0 and 31.2 times higher than that at the SWCNTs/GC and bare GC electrodes, respectively. The proposed modified electrode has a linear response range of 2.00 to 140.00 nM with a detection limit of 0.65 nM (S/N = 3) towards 9-ACA, which is due to the synergic effects of the SWCNTs (e.g. their good electrochemical properties and large surface area) and β-CD (e.g. a hydrophilic external surface and a high supramolecular recognition and enrichment capability).
authors.affiliation: State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China.
authors.forename: Gangbing
authors.initials: G
authors.lastname: Zhu
authors.forename: Xia
authors.initials: X
authors.lastname: Zhang
authors.forename: Pengbo
authors.initials: P
authors.lastname: Gai
authors.forename: Xiaohua
authors.initials: X
authors.lastname: Zhang
authors.forename: Jinhua
authors.initials: J
authors.lastname: Chen
mesh_terms: D000873:Anthracenes / Q000032:analysis*; D002244:Carbon / Q000737:chemistry; D055664:Electrochemical Techniques; D004566:Electrodes; D037742:Nanotubes, Carbon / Q000737:chemistry*; D010569:Perylene / Q000031:analogs & derivatives* / Q000737:chemistry; D047392:beta-Cyclodextrins / Q000737:chemistry*
chemical_list: C560550:3,4,9,10-perylene tetracarboxylic acid; D000873:Anthracenes; D037742:Nanotubes, Carbon; D047392:beta-Cyclodextrins; D010569:Perylene; C010030:9-anthroic acid; D002244:Carbon; C031215:betadex