A ruthenium(III) phosphonate complex on polyallylamine functionalized carbon nanotube multilayer films: self-assembly, direct electrochemistry, and electrocatalysis

作者：Li Pan; Liu Hailing; Yang Jie; Sun Dongmei; Chen Yu^*; Zhou Yiming; Cai Chenxin; Lu Tianhong

来源：Journal of Materials Chemistry B, 2014, 2(1): 102-109.

DOI：10.1039/c3tb21433h

On the basis of the electrostatic and donor-acceptor interactions between carboxylated multiwalled carbon nanotubes (MWCNT-COOH) and polyallylamine hydrochloride (PAH), PAH functionalized MWCNT multilayer films ({PAH/MWCNT-COOH}(n)) were readily formed on a glassy carbon (GC) electrode surface through a layer-by-layer (LBL) self-assembly method. Then, the PAH functionalized MWCNT multilayer films were used as a functional interface to effectively immobilize the ruthenium(III) ethylenediamine-tetramethylene phosphonate (EDTMP-RuIII) complex through the strong electrostatic and/or hydrogen bonding interactions between -NH2 and -PO3H2 groups. Fourier transform infrared spectroscopy (FT-IR), ultraviolet-visible spectroscopy (UV-vis), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), energy dispersive spectrum (EDS) mapping, and Raman measurements were used to characterize the self-assembly process, structure, composition and morphology of the EDTMP-Ru-III/{PAH/MWCNT-COOH}(n)/GC electrode. In the EDTMP-Ru-III/{PAH/ MWCNT-COOH}(n)/GC electrode, the immobilized EDTMP-Ru-III complex could directly exchange electrons with the substrate electrode and showed excellent electrocatalytic activity towards iodate reduction. Thus, the fabricated EDTMP-RuIII/{PAH/MWCNT-COOH}(n)/GC electrode could be used as an electrochemical sensor for iodate detection.

• 出版日期2014
• 单位南京师范大学