Porphyrin Metalation at the MgO Nanocube/Toluene Interface

Journal article


Publication Details

Author(s): Schneider J, Kollhoff F, Bernardi J, Kaftan A, Libuda J, Berger T, Laurin M, Diwaid O
Journal: ACS Applied Materials and Interfaces
Publisher: AMER CHEMICAL SOC
Publication year: 2015
Volume: 7
Journal issue: 41
Pages range: 22962-22969
ISSN: 1944-8244


Abstract

Molecular insights into porphyrin adsorption on nanostructured metal oxide surfaces and associated ion exchange reactions are key to the development of functional hybrids for energy conversion, sensing, and light emission devices. Here we investigated the adsorption of tetraphenylporphyrin (2HTPP) from toluene solution on two types of MgO powder. We compare MgO nanocubes with an average size d < 10 nm and MgO cubes with 10 nm <= d <= 1000 nm. Using molecular spectroscopy techniques such as UV/vis transmission and diffuse reflectance (DR), photoluminescence (PL), and diffuse reflectance infrared Fourier-transform (DRIFT) spectroscopy in combination with structural characterization techniques (powder X-ray diffraction and transmission electron microscopy, TEM), we identified a new room temperature metalation reaction that converts 2HTPP into magnesium tetraphenyl-porphyrin (MgTPP). Mg2+ uptake from the MgO nanocube surfaces and the concomitant protonation of the oxide surface level off at a concentration that corresponds to roughly one monolayer equivalent adsorbed on the MgO nanocubes. Larger MgO cubes, in contrast, show suppressed exchange, and only traces of MgTPP can be detected by photoluminescence.


FAU Authors / FAU Editors

Kaftan, Andre
Lehrstuhl für Physikalische Chemie II
Kollhoff, Fabian
Lehrstuhl für Physikalische Chemie II
Laurin, Mathias Dr.
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

Universität Salzburg (Paris Lodron Universität Salzburg)
Vienna University of Technology


Research Fields

D Catalytic Materials
Exzellenz-Cluster Engineering of Advanced Materials


How to cite

APA:
Schneider, J., Kollhoff, F., Bernardi, J., Kaftan, A., Libuda, J., Berger, T.,... Diwaid, O. (2015). Porphyrin Metalation at the MgO Nanocube/Toluene Interface. ACS Applied Materials and Interfaces, 7(41), 22962-22969. https://dx.doi.org/10.1021/acsami.5b08123

MLA:
Schneider, Johannes, et al. "Porphyrin Metalation at the MgO Nanocube/Toluene Interface." ACS Applied Materials and Interfaces 7.41 (2015): 22962-22969.

BibTeX: 

Last updated on 2019-20-03 at 11:53