Next Article in Journal
Recent Advances in Conjugated Graft Copolymers: Approaches and Applications
Next Article in Special Issue
Polyethersulfone Mats Functionalized with Porphyrin for Removal of Para-nitroaniline from Aqueous Solution
Previous Article in Journal
One Pot and Metal-Free Approach to 3-(2-Hydroxybenzoyl)-1-aza-anthraquinones
Previous Article in Special Issue
Zinc Porphyrin-Functionalized Fullerenes for the Sensitization of Titania as a Visible-Light Active Photocatalyst: River Waters and Wastewaters Remediation
Open AccessArticle

Self-Assembly of Covalently Linked Porphyrin Dimers at the Solid–Liquid Interface

Institute for Molecules and Materials, Radboud University, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands
Institute of Physics, University of Rostock, Albert-Einstein-Straße 23, 18059 Rostock, Germany
Department Life, Light & Matter—University of Rostock, 18051 Rostock, Germany
Author to whom correspondence should be addressed.
These authors contributed equally.
Academic Editors: Nathalie Solladié and Regis Rein
Molecules 2019, 24(16), 3018;
Received: 31 July 2019 / Revised: 12 August 2019 / Accepted: 17 August 2019 / Published: 20 August 2019
(This article belongs to the Special Issue Spatial Organization of Multi-Porphyrins for Pre-Defined Properties)
The synthesis and surface self-assembly behavior of two types of metal-porphyrin dimers is described. The first dimer type consists of two porphyrins linked via a rigid conjugated spacer, and the second type has an alkyne linker, which allows rotation of the porphyrin moieties with respect to each other. The conjugated dimers were equipped with two copper or two manganese centers, while the flexible dimers allowed a modular built-up that also made the incorporation of two different metal centers possible. The self-assembly of the new porphyrin dimers at a solid–liquid interface was investigated at the single-molecule scale using scanning tunneling microscopy (STM). All dimers formed monolayers, of which the stability and the internal degree of ordering of the molecules depended on the metal centers in the porphyrins. While in all monolayers the dimers were oriented coplanar with respect to the underlying surface (‘face-on’), the flexible dimer containing a manganese and a copper center could be induced, via the application of a voltage pulse in the STM setup, to self-assemble into monolayers in which the porphyrin dimers adopted a non-common perpendicular (‘edge-on’) geometry with respect to the surface. View Full-Text
Keywords: porphyrins; self-assembly; scanning tunneling microscopy; surfaces porphyrins; self-assembly; scanning tunneling microscopy; surfaces
Show Figures

Graphical abstract

MDPI and ACS Style

Habets, T.; Lensen, D.; Speller, S.; Elemans, J.A. Self-Assembly of Covalently Linked Porphyrin Dimers at the Solid–Liquid Interface. Molecules 2019, 24, 3018.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Back to TopTop