アキヤマ　ヨシカツ   Akiyama Yoshikatsu   秋山　義勝    所属   医学研究科 医学研究科 (医学部医学科をご参照ください)    職種   講師
論文種別	原著
言語種別	英語
査読の有無	査読あり
表題	Thermally Modulated Cationic Copolymer Brush on Monolithic Silica Rods for High-Speed Separation of Acidic Biomolecules
掲載誌名	正式名：ACS Applied Materials & Interfaces 略　 称：ACS Appl. Mater. Interfaces ISSNコード：19448244
巻・号・頁	5(4),pp.1442-1452
著者・共著者	Nagase Kenichi†, Kobayashi Jun, Kikuchi Akihiko, Akiyama Yoshikatsu, Kanazawa Hideko, Okano Teruo
発行年月	2013/02
概要	Poly(N-isopropylacrylamide (IPAAm)-co-2-(dimethylamino)ethylmethacrylate(DMAEMA)-co-tert-butylacrylamide(tBAAm)), a thermoresponsive-cationic-copolymer, brush-grafted monolithic-silica column was prepared throughsurface-initiated atom transfer radical polymerization (ATRP)for effective thermoresponsive anion-exchange chromatography matrices. ATRP-initiator was grafted on monolithic silicarod surfaces by flowing a toluene solution containing ATRP initiator into monolithic silica-rod columns. IPAAm, DMAEMA, and tBAAm monomers and CuCl/CuCl2/Me6TREN, an ATRP catalytic system, were dissolved in 2-propanol, and the reaction solution was pumped into the preprepared initiator modified columns at 25 °C for 16 h. The constructed copolymer-brush structure on monolithic silica-rod surface was confirmed by X-ray photoelectron spectroscopy (XPS), elemental analysis, scanning electron microscopy (SEM) observation, and gel permeation chromatography (GPC) measurement of grafted copolymer. The prepared monolithic silica-rod columns were also characterized by chromatographic analysis. The cationic copolymer brush modified monolithic silica-rod columns were able to separate adenosine nucleotides with a shorter analysis time (4 min) than thermoresponsive copolymer brush-modified silicabead- packed columns, because of the reduced diffusion path length of monolithic supporting materials. These results indicated that thermoresponsive cationic copolymer brush grafted monolithic silica-rod column prepared by ATRP was a promising tool for analyzing acidic-bioactive compounds with a remarkably short analysis time.
DOI	dx.doi.org/10.1021/am302889j