Uppalapati Suji, Kong Na, Norberg Oscar, Ramström Olof, Yan Mingdi
Department of Chemistry, University of Massachusetts Lowell, 1 University Ave., Lowell, MA 01854, United States.
KTH-Royal Institute of Technology, Department of Chemistry, Teknikringen 30, S-10044 Stockholm, Sweden.
Appl Surf Sci. 2015 Jul 15;343:166-171. doi: 10.1016/j.apsusc.2015.03.014.
Covalently immobilized poly(4-vinylphenol) (PVP) monolayer films were fabricated by spin coating PVP on perfluorophenyl azide (PFPA)-functionalized surface followed by UV irradiation. The pH-responsive behavior of these PVP ultrathin films was evaluated by ellipsometry, quartz crystal microbalance (QCM) and surface plasmon resonance (SPR). By monitoring the responses of these films to pH , the ionization constant of the monolayer thin films was obtained. The apparent p value of these covalently immobilized PVP monolayers, 13.4 by SPR, was 3 units higher than that of the free polymer in aqueous solution.
通过将聚（4-乙烯基苯酚）（PVP）旋涂在全氟苯基叠氮化物（PFPA）功能化表面上，随后进行紫外线照射，制备了共价固定的PVP单层膜。通过椭偏仪、石英晶体微天平（QCM）和表面等离子体共振（SPR）评估了这些PVP超薄膜的pH响应行为。通过监测这些膜对pH的响应，获得了单层薄膜的电离常数。这些共价固定的PVP单层的表观p值通过SPR测定为13.4，比水溶液中游离聚合物的p值高3个单位。
