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

Kollhoff F, Schneider J, Li G, Barkaoui S, Shen W, Berger T, Diwald O, Libuda J (2018)

Publication Status: Published

Publication Type: Journal article

Publication year: 2018

Journal

Physical Chemistry Chemical Physics Royal Society of Chemistry

Publisher: ROYAL SOC CHEMISTRY

Book Volume: 20

Pages Range: 24858-24868

Journal Issue: 38

DOI: 10.1039/c8cp04873h

Abstract

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.

Authors with CRIS profile

Fabian Kollhoff Lehrstuhl für Physikalische Chemie II Jörg Libuda Professur für Physikalische Chemie

Additional Organisation(s)

Exzellenz-Cluster Engineering of Advanced Materials (EAM)

Involved external institutions

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

How to cite

APA:

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. https://doi.org/10.1039/c8cp04873h

MLA:

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

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