Squeezing, then stacking:From breathing pores to three-dimensional ionic self-assembly under electrochemical control

Cui, K. and Mali, K.S. and Ivasenko, O. and Wu, D. and Feng, X. and Walter, M. and Müllen, K. and De Feyter, S. and Mertens, S.F.L. (2014) Squeezing, then stacking:From breathing pores to three-dimensional ionic self-assembly under electrochemical control. Angewandte Chemie International Edition, 53 (47). pp. 12951-12954. ISSN 1433-7851

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Abstract

We demonstrate the spontaneous and reversible transition between the two- and three-dimensional self-assembly of a supramolecular system at the solid-liquid interface under electrochemical conditions, using in situ scanning tunneling microscopy. By tuning the interfacial potential, we can selectively organize our target molecules in an open porous pattern, fill these pores to form an auto-host-guest structure, or stack the building blocks in a stratified bilayer. Using a simple electrostatic model, we rationalize which charge density is required to enable bilayer formation, and conversely, which molecular size/charge ratio is necessary in the design of new building blocks. Our results may lead to a new class of electrochemically controlled dynamic host-guest systems, artificial receptors, and smart materials. A reason to reorganize: When the substrate potential is tuned, a charged discoid polycyclic aromatic compound can be made to self-assemble to form a structure with open pores, an auto-host-guest structure, or a stratified bilayer (see picture). © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Item Type:
Journal Article
Journal or Publication Title:
Angewandte Chemie International Edition
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1500/1503
Subjects:
ID Code:
132987
Deposited By:
Deposited On:
22 Apr 2019 15:25
Refereed?:
Yes
Published?:
Published
Last Modified:
19 Aug 2020 05:20