Versatile (bio)functionalization of bromo-terminated phosphonate-modified porous aluminum oxide

Aline Debrassi, Esther Roeven, Selina Thijssen, Luc Scheres, Willem M. De Vos, Tom Wennekes*, Han Zuilhof

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review


Porous aluminum oxide (PAO) is a nanoporous material used for various (bio)technological applications, and tailoring its surface properties via covalent modification is a way to expand and refine its application. Specific and complex chemical modification of the PAO surface requires a stepwise approach in which a secondary reaction on a stable initial modification is necessary to achieve the desired terminal molecular architecture and reactivity. We here show that the straightforward initial modification of the bare PAO surface with bromo-terminated phosphonic acid allows for the subsequent preparation of PAO with a wide scope of terminal reactive groups, making it suitable for (bio)functionalization. Starting from the initial bromo-terminated PAO, we prepared PAO surfaces presenting various terminal functional groups, such as azide, alkyne, alkene, thiol, isothiocyanate, and N-hydroxysuccinimide (NHS). We also show that this wide scope of easily accessible tailored reactive PAO surfaces can be used for subsequent modification with (bio)molecules, including carbohydrate derivatives and fluorescently labeled proteins.

Original languageEnglish
Pages (from-to)5633-5644
Number of pages12
Issue number20
Publication statusPublished - 26 May 2015
Externally publishedYes


Dive into the research topics of 'Versatile (bio)functionalization of bromo-terminated phosphonate-modified porous aluminum oxide'. Together they form a unique fingerprint.

Cite this