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Ionization of Covalent Immobilized poly(4-vinylphenol) Monolayers Measured by Ellipsometry, QCM and SPR

Ionization of Covalent Immobilized poly(4-vinylphenol) Monolayers Measured by Ellipsometry, QCM and SPR

Suji Uppalapati, Na Kong, Oscar Norberg, Olof Ramström, Mingdi Yan

Appl Surf Sci. 2015 Jul 15;343:166-171.

PMID: 26097271

Abstract:

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 in situ, the ionization constant of the monolayer thin films was obtained. The apparent pKa value of these covalently immobilized PVP monolayers, 13.4 by SPR, was 3 units higher than that of the free polymer in aqueous solution.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP24979702	Poly(4-vinylphenol)		24979-70-2	Price

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