Disubstituted Polyacetylene Brushes Grown via Surface-Directed Tungsten-Catalyzed Polymerization

摘要

Disubstituted polyacetylene brashes were grown from modified silicon and quartz surfaces using a transition metal-catalyzed polymerization technique employing tungsten hexacnloride/tetraphenyl tin(WCl6/Ph4Sn).The substrate surfaces were initially functionalized with terminal alkyne functional groups by using an alkyne-functionalized silane,O-(propagyloxy)-N-(triethoxysilylpropyl)urethane,as a surface coupling agent.Surface polymerization of 5-decyne under microwave irradiation at 150 deg C for 30 min was performed on the functional surfaces to produce surfaces consisting of grafted poly(1,2-dibutylacetylene)brushes.The alkyne-functionalized and polymer-coated surfaces were characterized using surface contact angle measurements,film thickness measurements,atomic force microscopy,and X-ray photoelectron spectroscopy,and fluorescence spectrometer measurements were performed to analyze the surfaces at each step of the modification process.This simple technique demonstrates a novel way of synthesizing a poly-(1,2-dibutylacetylene)brush layer on silicon substrate,and it has future potential in the fabrication of selectively functionalized surfaces on the nanoscale via this new synthetic approach.