University of Twente Student Theses

Login

Recognition of metal cations with surface immobilized crown ether functionalized poly(ferrocenylsilane)

Brand, M. (2015) Recognition of metal cations with surface immobilized crown ether functionalized poly(ferrocenylsilane).

[img] PDF
3MB
Abstract:For the design of an electrochemical sensor, a functionalized benzo-18-crown-6 is required for the attachment to iodopropyl-functionalized poly(ferrocenylsilane) (PFS). Various acylation reactions were investigated, as this was the crucial step in view of obtaining a clean product of hydroxyl-functionalized benzo-18-crown-6. The different reactions were carried out at 50°C or room temperature using solid catalysts and acids. The acylation performed at room temperature using Eaton’s reagent as catalyst yielded 69% of 4’-acetylbenzo-18-crown-6 without by-products. 4’-Hydroxybenzo-18-crown-6 could be obtained after the Baeyer-Villiger oxidation and hydrolysis, with 17% of unfunctionalized crown ether startingmaterial present. The electrochemical sensor, consisting of 4’-aminobenzo-18-crown-6 attached to a PFS-modified gold substrate, was successfully tested since it responded to very low potassium ion concentrations in aqueous solution.
Item Type:Essay (Bachelor)
Faculty:TNW: Science and Technology
Subject:58 process technology
Programme:Chemical Engineering BSc (56960)
Link to this item:https://purl.utwente.nl/essays/68428
Export this item as:BibTeX
EndNote
HTML Citation
Reference Manager

 

Repository Staff Only: item control page