title: Novel photoinduced grafting-chemical reaction sequence for the construction of a glycosylation surface.
abstract: Carbohydrates play a major role in many recognition events, such as blood coagulation, immune response, fertilization, cell growth, embryogenesis, and cellular signal transfer, which are essential for the survival of living entities. Synthetic carbohydrate-based polymers, so-called glycopolymers, are emerging as important well-defined tools for investigating carbohydrate-based biological processes and for simulating various functions of carbohydrates. In this work, we present a facile strategy for the formation of glycopolymer tethered on polypropylene microporous membrane surface. Acrylamide was grafted onto the polypropylene microporous membrane surface by photoinduced graft polymerization in the presence of benzophenone. The amide groups of grafted poly(acrylamide) were then transformed to primary amine groups by the Hofmann rearrangement reaction. Quantificational evaluation of the rearrangement reaction was carried out by ninhydrin method and mass weighting. Sugar moieties were coupled with the grafted functional layer to form glycopolymer by the reaction between primary amine groups and carbohydrate lactones. The grafting of acrylamide, the conversion of amide groups to amine groups, and the coupling of sugar moieties were confirmed by Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy combined with surface morphology observation by scanning electron microscopy.
authors.affiliation: Institute of Polymer Science and Key Laboratory of Macromolecular Synthesis and Functionalization, Ministry of Education, Zhejiang University, Hangzhou 310027, People's Republic of China.
authors.forename: Qian
authors.initials: Q
authors.lastname: Yang
authors.forename: Jing
authors.initials: J
authors.lastname: Tian
authors.forename: Zheng-Wei
authors.initials: ZW
authors.lastname: Dai
authors.forename: Meng-Xin
authors.initials: MX
authors.lastname: Hu
authors.forename: Zhi-Kang
authors.initials: ZK
authors.lastname: Xu
mesh_terms: D002241:Carbohydrates / Q000737:chemistry; D006031:Glycosylation; D008027:Light; D008855:Microscopy, Electron, Scanning; D008956:Models, Chemical; D009555:Ninhydrin / Q000737:chemistry; D011108:Polymers / Q000737:chemistry; D013052:Spectrometry, X-Ray Emission; D013055:Spectrophotometry, Infrared; D017550:Spectroscopy, Fourier Transform Infrared; D013499:Surface Properties; D013696:Temperature; D014466:Ultraviolet Rays
chemical_list: D002241:Carbohydrates; D011108:Polymers; D009555:Ninhydrin