The polymorphism of porphyrin 2D assemblies at the liquid-graphite interface: the effect of a polar solvent additive and a flexible spacer on the face-on and edge-on type molecular arrangements

Self-assembly structures of 5,10,15,20-tetrakis(4-substituted phenyl)porphyrins at the liquid-graphite interface were investigated by scanning tunneling microscopy. We found that the presence of a small amount of a polar solvent, i.e. , only 0.5 vol% of octanoic acid in phenyloctane, significantly a...

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Bibliographic Details
Published in:Chemical communications (Cambridge, England) England), 2019-07, Vol.55 (6), p.8836-8839
Main Authors: Adachi, Kenya, Hirose, Takashi, Matsuda, Kenji
Format: Article
Language:English
Subjects:
Graphite
Octanoic acid
Polymorphism
Porphyrins
Self-assembly
Solvents
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Summary:Self-assembly structures of 5,10,15,20-tetrakis(4-substituted phenyl)porphyrins at the liquid-graphite interface were investigated by scanning tunneling microscopy. We found that the presence of a small amount of a polar solvent, i.e. , only 0.5 vol% of octanoic acid in phenyloctane, significantly affected the selective formation of the face-on polymorph over the edge-on one likely due to the solvent-molecule interactions at the 2D interface. The edge-on type 2D self-assembly can be selectively formed by managing hydrogen bonding interactions at the liquid-solid interface.
ISSN:1359-7345
1364-548X
DOI:10.1039/c9cc02579k