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Temperature-controlled self-assembling structure with selective guest-recognition at the liquid-solid interface.

Authors
Type
Published Article
Journal
Physical Chemistry Chemical Physics
1463-9076
Publisher
The Royal Society of Chemistry
Publication Date
Volume
15
Issue
1
Pages
125–128
Identifiers
DOI: 10.1039/c2cp43244g
PMID: 23147835
Source
Medline

Abstract

We investigate the influence of temperature on the self-assembly of 2,6,11-tricarboxydecyloxy-3,7,10-triundecyloxy triphenylene (asym-TTT) adsorbed on HOPG using scanning tunneling microscopy (STM) at the liquid/solid interface. We show that the packing structures of 2D self-assembled asym-TTT can be precisely tuned by adjusting the substrate temperature. The temperature change from 20 °C to 35 °C induces two phase transitions and increment in the packing density from 0.161 to 0.179 molecules per nm(2). The density-functional theory (DFT) calculations reveal that their interaction energies are similar. In particular, the experimental findings further illustrate the preferential adsorption of guest molecules, such as phthalocyanine, only in the domain of more close packing structures.

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