Assembly of 12-tungstosilicic acid and 4-aminobenzo-15-crown-5 ether based on the electrostatic attraction through bridging of oxonium ions on different substrates

Add time:08/26/2019    Source:sciencedirect.com

Based on the electrostatic attraction Keggin-type polyoxometalate H4SiW12O40 (SiW12) and small molecule 4-aminobenzo-15-crown-5 ether (4-AB15C5) were alternately deposited on poly (allylamine hydrochloride) (PAH)-derived indium tin oxide (ITO) substrate through a layer-by-layer (LBL) self-assembly, forming a supramolecular multilayer film (film-A). SiW12 was also deposited on a glassy carbon electrode (GCE) derived by 4-AB15C5 via covalent bonding in 0.1 M NaCl aqueous solution and formed a composite monolayer film (film-B). UV–vis absorption spectroscopy, X-ray photoelectron spectroscopy (XPS) and Fourier-transform infrared (FTIR) spectroscopy measurements demonstrated that the interactions between SiW12 and 4-AB15C5 in both two film electrodes were the same and caused by the bridging action of oxonium ions. But, the nanostructure in the two film electrodes was different. 4-AB15C5 in film-A was oriented horizontally to ITO substrate, however, that in film-B was oriented vertically to GCE. Namely film-A corresponded to a layer structure, and film-B corresponded to an intercalation structure.

We also recommend Trading Suppliers and Manufacturers of 4-Aminobenzo-15-crown-5 hydrochloride (cas 111076-66-5). Pls Click Website Link as below: cas 111076-66-5 suppliers

Prev:Synthesis of the orienticin C M(2–4) macrocycle utilizing a nucleophilic aromatic substitution strategy
Next:Electrochemical determination of Saxagliptin hydrochloride with MWCNTs/CuO/4′aminobenzo-18-crown-6-ether composite modified carbon paste electrode)