Please use this identifier to cite or link to this item:
|Title:||Surface functionalization of glass and polymeric substrates via graft copolymerization of viologen in an aqueous medium||Authors:||Liu, X.
|Issue Date:||2-Apr-2002||Citation:||Liu, X., Neoh, K.G., Zhao, L., Kang, E.T. (2002-04-02). Surface functionalization of glass and polymeric substrates via graft copolymerization of viologen in an aqueous medium. Langmuir 18 (7) : 2914-2921. ScholarBank@NUS Repository. https://doi.org/10.1021/la011666p||Abstract:||Surface functionalization of low-density polyethylene (LDPE), silanized glass, and free-standing polyaniline (PANI) films via UV-induced graft copolymerization with 1,1′-bis(4-vinyl-benzyl)-4,4′- bipyridinium dichloride (VBV) was carried out. The vinyl group containing viologen was synthesized by the double Anderson reaction using 4,4′-bipyridine and vinyl benzyl chloride and characterized by elemental analysis, FTIR spectrum, and X-ray photoelectron spectroscopy. The graft copolymerization of VBV was carried out by placing the plasma-pretreated substrate in contact with an aqueous solution of VBV under UV irradiation. The effects of the plasma-pretreatment time of the substrate, UV-induced graft copolymerization time, and monomer concentration on the VBV-graft copolymer concentration were investigated. The responses of the VBV-graft-copolymerized LDPE films and silanized glass slides to photoirradiation were monitored. In both cases, intensely blue viologen radical cations were formed after 10 min of UV irradiation in a vacuum and bleaching occurred when the substrate was exposed to air upon termination of the irradiation. VBV-graft-copolymerized PANI films with good conductivity can be prepared, and these films may have possible applications as active templates in biosensors where the viologen groups may serve as electron transfer mediators from the electrode surface to the active site of biomaterials. This method of surface functionalization of viologen moieties offers a number of advantages over a previously developed technique.||Source Title:||Langmuir||URI:||http://scholarbank.nus.edu.sg/handle/10635/66823||ISSN:||07437463||DOI:||10.1021/la011666p|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Apr 23, 2019
WEB OF SCIENCETM
checked on Apr 23, 2019
checked on Apr 22, 2019
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.