Anchoring of carboxyl-functionalized porphyrins on MgO, TiO2, and Co3O4 nanoparticles

Journal article

Publication Details

Author(s): Kollhoff F, Schneider J, Li G, Barkaoui S, Shen W, Berger T, Diwald O, Libuda J
Journal: Physical Chemistry Chemical Physics
Publication year: 2018
Volume: 20
Journal issue: 38
Pages range: 24858-24868
ISSN: 1463-9076
eISSN: 1463-9084


Hybrid materials consisting of functional organic molecules on metal oxide nanomaterials are key components in emerging technologies, for example in energy conversion and molecular electronics. In this work, we present the results of a comparative study of carboxyl-functionalized porphyrins on different oxide nanomaterials. Specifically, we investigated the interaction of 5(3-carboxyphenyl)-10,15,20-triphenyl-21,23H-porphyrin (2H-3-MCTPP) and 5(4-carboxyphenyl)-10,15,20-triphenyl-21,23H-porphyrin (2H-4-MCTPP), on MgO, TiO2, and Co3O4 nanoparticles (NPs) using isothermal and temperature-programmed diffuse reflection infrared Fourier transform spectroscopy (DRIFTS). We show that both porphyrins bind to the NPs, yielding stable monolayer films consisting of tilted surface carboxylates. In all cases, anchoring through the carboxylic acid group suppresses self-metalation of the porphyrin unit. Upon annealing, all anchored porphyrin films undergo metalation. The position of the acid group has no major influence on the reactivity. The same is true for the nature of the metal oxide, suggesting that the observed behaviour is general for most anchored porphyrin films on oxide nanomaterials.

FAU Authors / FAU Editors

Kollhoff, Fabian
Lehrstuhl für Physikalische Chemie II
Libuda, Jörg Prof. Dr.
Professur für Physikalische Chemie

Additional Organisation
Exzellenz-Cluster Engineering of Advanced Materials

External institutions with authors

Chinese Academy of Sciences (CAS) / 中国科学院
Universität Salzburg (Paris Lodron Universität Salzburg)

Research Fields

D Catalytic Materials
Exzellenz-Cluster Engineering of Advanced Materials

How to cite

Kollhoff, F., Schneider, J., Li, G., Barkaoui, S., Shen, W., Berger, T.,... Libuda, J. (2018). Anchoring of carboxyl-functionalized porphyrins on MgO, TiO2, and Co3O4 nanoparticles. Physical Chemistry Chemical Physics, 20(38), 24858-24868.

Kollhoff, Fabian, et al. "Anchoring of carboxyl-functionalized porphyrins on MgO, TiO2, and Co3O4 nanoparticles." Physical Chemistry Chemical Physics 20.38 (2018): 24858-24868.


Last updated on 2019-19-02 at 16:23