Tuning the packing density of host molecular self-assemblies at the solid–liquid interface using guest molecule

Miao, Xinrui; Xu, Li; Li, Yijing; Li, Zhuomin; Jian, Zhou; Deng, Wenli

doi:10.1039/c0cc02554b

Cited by 33 publications

(30 citation statements)

References 35 publications

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“…Just as in three dimensions, crystal engineering in two dimensions deals with elements of the well-known repertoire of non-covalent interactions that define supramolecular chemistry. The term 'two-dimensional crystal engineering' [15][16][17][18][19][20][21][22] has become increasingly recognized in recent years. One of the most extensively investigated facets is the structural polymorphism in these so-called two-dimensional crystals, wherein two different crystalline packings can be obtained upon deposition of a single building block.…”

Section: Introductionmentioning

confidence: 99%

Principles of molecular assemblies leading to molecular nanostructures

Mali

Feyter

2013

Phil. Trans. R. Soc. A.

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Self-assembled physisorbed monolayers consist of regular two-dimensional arrays of molecules. Two-dimensional self-assembly of organic and metal–organic building blocks is a widely used strategy for nanoscale functionalization of surfaces. These supramolecular nanostructures are typically sustained by weak non-covalent forces such as van der Waals, electrostatic, metal–ligand, dipole–dipole and hydrogen bonding interactions. A wide variety of structurally very diverse monolayers have been fabricated under ambient conditions at the liquid–solid and air–solid interface or under ultra-high-vacuum (UHV) conditions at the UHV–solid interface. The outcome of the molecular self-assembly process depends on a variety of factors such as the nature of functional groups present on assembling molecules, the type of solvent, the temperature at which the molecules assemble and the concentration of the building blocks. The objective of this review is to provide a brief account of the progress in understanding various parameters affecting two-dimensional molecular self-assembly through illustration of some key examples from contemporary literature.

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Section: Introductionmentioning

confidence: 99%

Principles of molecular assemblies leading to molecular nanostructures

Mali

Feyter

2013

Phil. Trans. R. Soc. A.

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“…be taken under ultrahigh-vacuum conditions, 21 ambient conditions, 22 liquids, 23 and over a wide temperature range. 24 By using STM, the information about arrangement and orientation of organic molecules on solid surfaces can be obtained.…”

Section: Introductionmentioning

confidence: 99%

Effect of Bromine and Substituted Alkyl Chain on the Interfacial Self-Assembly of Bromobenzene Derivatives by Scanning Tunneling Microscopy

Li¹,

Miao²,

Liu³

et al. 2012

J. Nanosci. Nanotech.

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The self-assemblies of four compounds, 1-bromo-4-(hexadecyloxy)benzene (BHB-16), 1-bromo-4-(octadecyloxy)benzene (BOB-18), 1-bromo-4-(pentadecyloxy)benzene (BPB-15) and 1,4-dibromo-2,5-(dioctadecyloxy)benzene (DDB-18), have been studied on highly oriented pyrolytic graphite (HOPG) under ambient conditions by scanning tunneling microscopy (STM), with the aim of understanding the influence of the molecular structure and functional groups on the arrangements. It is found that the bromine atoms of the four molecules are in bright contrast and can be identified in STM images. The neighbouring phenyl head groups of the BHB-16, BOB-18 and BPB-15 molecules in one lamella, with an anti-parallel orientation, are interdigitated with different offset distance, while the aromatic cores of DDB-18 molecules in the same row are in a parallel orientation. Moreover, an odd-even effect is observed in the self-assemblies of the former three molecules as expected. The STM images of the four molecules resemble the calculated HOMO electron density contours somewhat with positive surface bias voltage. On the basis of comparative analysis between the STM images, it is suggested that the electrostatic attractions between the neighbouring molecules play an important role in the self-assemblies of BHB-16, BOB-18 and BPB-15, while it is the van der Waals force and the non-covalent halogen-halogen interaction that dominate the structure of DDB-18 adlayer.

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“…Ultimately, the SAM formation is a dynamic process and essentially depends on the adsorption-desorption equilibrium toward a minimum of the overall free energy. 2,3 In terms of the chemical reaction kinetics, successful STM imaging at the interface results from the interplay of adsorbate-adsorbate and adsorbate-substrate interactions. Thus, it is essential to understand and utilize these mutual effects for the realization of desired organic nanostructures with special electronic functions.…”

Section: Introductionmentioning

confidence: 99%

Two-dimensional self-assembly of single-, poly- and co-crystals at the liquid/solid interface

Liu

Miao

et al. 2014

CrystEngComm

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Tuning the packing density of host molecular self-assemblies at the solid–liquid interface using guest molecule

Abstract: The use of THB molecules as a guest template tunes the formation of a two-dimensional honeycomb network in preference to alternative close packed structures of TECDB self-assembled on HOPG surface at the solid-liquid interface.

Cited by 33 publications

References 35 publications

Principles of molecular assemblies leading to molecular nanostructures

Principles of molecular assemblies leading to molecular nanostructures

Effect of Bromine and Substituted Alkyl Chain on the Interfacial Self-Assembly of Bromobenzene Derivatives by Scanning Tunneling Microscopy

Two-dimensional self-assembly of single-, poly- and co-crystals at the liquid/solid interface

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