Functionalized Porphyrins on an Atomically Defined Oxide Surface: Anchoring and Coverage-Dependent Reorientation of MCTPP on Co3O4(111)

Werner K, Mohr S, Schwarz M, Xu T, Amende M, Döpper T, Görling A, Libuda J (2016)

Publication Language: English

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2016

Journal

Publisher: American Chemical Society

Book Volume: 7

Pages Range: 555-560

Journal Issue: 3

DOI: 10.1021/acs.jpclett.5b02784

Abstract

We have studied the adsorption of tetraphenylporphyrin (2HTPP) and its carboxylated counterpart mono-para-carboxyphenyltriphenylporphyrin (MCTPP) on an atomically defined CoO(111) film under ultrahigh vacuum (UHV) conditions. Using time-resolved infrared reflection absorption spectroscopy (TR-IRAS), we show that 2HTPP adsorbs molecularly in a flat-lying orientation, whereas MCTPP binds to the surface via formation of a chelating bidentate carboxylate upon deposition at 400 K. Combining TR-IRAS and density-functional theory (DFT), we determine the molecular tilting angle as a function of coverage. We show that the MCTPP adsorption geometry changes from a nearly flat-lying orientation (tilting angle <30°) at low coverage to a nearly perfectly upright-standing orientation (tilting angle of approximately 80°) in the full monolayer.

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APA:

Werner, K., Mohr, S., Schwarz, M., Xu, T., Amende, M., Döpper, T.,... Libuda, J. (2016). Functionalized Porphyrins on an Atomically Defined Oxide Surface: Anchoring and Coverage-Dependent Reorientation of MCTPP on Co3O4(111). Journal of Physical Chemistry Letters, 7(3), 555-560. https://doi.org/10.1021/acs.jpclett.5b02784

MLA:

Werner, Kristin, et al. "Functionalized Porphyrins on an Atomically Defined Oxide Surface: Anchoring and Coverage-Dependent Reorientation of MCTPP on Co3O4(111)." Journal of Physical Chemistry Letters 7.3 (2016): 555-560.

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