Racemic Dimers as Models of Chiral Macrocycles Self-Assembled on Pyrolytic Graphite

2021 ◽  
Author(s):  
Egor Ukraintsev ◽  
Václav Houska ◽  
Jaroslav Vacek ◽  
Ivo Starý ◽  
Irena G. Stará ◽  
...  
Keyword(s):  
Pyrolytic Graphite ◽  
Self Assembled ◽  
Chiral Macrocycles

scholarly journals Scanning Tunneling Microscope Investigation of Self-Assembled Rosette Nanotubes on Highly Ordered Pyrolytic Graphite

2010 ◽  
Vol 16 (S2) ◽  
pp. 470-471 ◽  
Author(s):  
J-Y Cho ◽  
G Borzsonyi ◽  
H Fenniri
Keyword(s):  
Scanning Tunneling Microscope ◽  
Pyrolytic Graphite ◽  
Scanning Tunneling ◽  
Tunneling Microscope ◽  
Microscope Investigation ◽  
Rosette Nanotubes ◽  
Highly Ordered Pyrolytic Graphite ◽  
Self Assembled

Extended abstract of a paper presented at Microscopy and Microanalysis 2010 in Portland, Oregon, USA, August 1 – August 5, 2010.

scholarly journals Self-assembled monolayers of shape-persistent macrocycles on graphite: interior design and conformational polymorphism

2014 ◽  
Vol 10 ◽  
pp. 2774-2782 ◽  
Author(s):  
Joscha Vollmeyer ◽  
Friederike Eberhagen ◽  
Sigurd Höger ◽  
Stefan-S Jester
Keyword(s):  
Interior Design ◽  
Pyrolytic Graphite ◽  
Self Assembled Monolayers ◽  
Scanning Tunneling ◽  
Tunneling Microscopy ◽  
Conformational Polymorphism ◽  
Assembled Monolayers ◽  
Self Assembled ◽  
Solid Liquid Interface ◽  
Solid Liquid

Three shape-persistent naphthylene–phenylene–acetylene macrocycles of identical backbone structures and extraannular substitution patterns but different (empty, apolar, polar) nanopore fillings are self-assembled at the solid/liquid interface of highly oriented pyrolytic graphite and 1,2,4-trichlorobenzene. Submolecularly resolved images of the resulting two-dimensional (2D) crystalline monolayer patterns are obtained by in situ scanning tunneling microscopy. A concentration-dependent conformational polymorphism is found, and open and more dense packing motifs are observed. For all three compounds alike lattice parameters are found, therefore the intermolecular macrocycle distances are mainly determined by their size and symmetry. This is an excellent example that the graphite acts as a template for the macrocycle organization independent from their specific interior.

STM observations of self-assembled 1D and 2D nanoclusters of aromatic cryptand molecules deposited on highly oriented pyrolytic graphite

1997 ◽  
Vol 4 (3-4) ◽  
pp. 375-379 ◽  
Author(s):  
L. Markey ◽  
D. Stievenard ◽  
A. Devos ◽  
M. Lannoo ◽  
F. Demol ◽  
...  
Keyword(s):  
Pyrolytic Graphite ◽  
Highly Oriented Pyrolytic Graphite ◽  
Self Assembled

Axial Ligand Effects on the Structures of Self-Assembled Gallium–Porphyrin Monolayers on Highly Oriented Pyrolytic Graphite

Langmuir ◽  
2016 ◽  
Vol 32 (2) ◽  
pp. 487-495 ◽  
Author(s):  
Judith M. Kamm ◽  
Cameron P. Iverson ◽  
Wing-Yeung Lau ◽  
Michael D. Hopkins
Keyword(s):  
Pyrolytic Graphite ◽  
Axial Ligand ◽  
Highly Oriented Pyrolytic Graphite ◽  
Ligand Effects ◽  
Self Assembled

scholarly journals Self-assembly and wetting properties of gold nanorod–CTAB molecules on HOPG

2019 ◽  
Vol 10 ◽  
pp. 696-705 ◽  
Author(s):  
Imtiaz Ahmad ◽  
Floor Derkink ◽  
Tim Boulogne ◽  
Pantelis Bampoulis ◽  
Harold J W Zandvliet ◽  
...  
Keyword(s):  
Self Assembly ◽  
Cetyltrimethylammonium Bromide ◽  
Pyrolytic Graphite ◽  
The Self ◽  
Gold Nanorod ◽  
Force Microscopy ◽  
Wetting Properties ◽  
Atomic Force ◽  
Highly Ordered Pyrolytic Graphite ◽  
Self Assembled

The formation of self-assembled superstructures of cetyltrimethylammonium bromide (CTAB) after drying on a nonwetting highly ordered pyrolytic graphite (HOPG) surface have been investigated using scanning electron microscopy (SEM) and atomic force microscopy (AFM). Although SEM did not reveal coverage of CTAB layers, AFM showed not only CTAB assembly, but also the dynamics of the process on the surface. The self-assembled layers of CTAB molecules on the HOPG terraces prior to nanorod deposition were shown to change the wettability of the surface, and as a result, gold nanorod deposition takes place on nonwetting HOPG terraces.

scholarly journals A priori calculations of the free energy of formation from solution of polymorphic self-assembled monolayers

2015 ◽  
Vol 112 (45) ◽  
pp. E6101-E6110 ◽  
Author(s):  
Jeffrey R. Reimers ◽  
Dwi Panduwinata ◽  
Johan Visser ◽  
Yiing Chin ◽  
Chunguang Tang ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Density Functional ◽  
A Priori ◽  
Pyrolytic Graphite ◽  
Density Functional Theory Calculations ◽  
Self Assembled Monolayer ◽  
Atomic Structures ◽  
Wide Range ◽  
Entropy Effects ◽  
Self Assembled

Modern quantum chemical electronic structure methods typically applied to localized chemical bonding are developed to predict atomic structures and free energies for meso-tetraalkylporphyrin self-assembled monolayer (SAM) polymorph formation from organic solution on highly ordered pyrolytic graphite surfaces. Large polymorph-dependent dispersion-induced substrate−molecule interactions (e.g., −100 kcal mol−1 to −150 kcal mol−1 for tetratrisdecylporphyrin) are found to drive SAM formation, opposed nearly completely by large polymorph-dependent dispersion-induced solvent interactions (70–110 kcal mol−1) and entropy effects (25–40 kcal mol−1 at 298 K) favoring dissolution. Dielectric continuum models of the solvent are used, facilitating consideration of many possible SAM polymorphs, along with quantum mechanical/molecular mechanical and dispersion-corrected density functional theory calculations. These predict and interpret newly measured and existing high-resolution scanning tunnelling microscopy images of SAM structure, rationalizing polymorph formation conditions. A wide range of molecular condensed matter properties at room temperature now appear suitable for prediction and analysis using electronic structure calculations.

Nanostructuration of self-assembled poly(styrene-b-isoprene-b-styrene) block copolymer thin films in a highly oriented pyrolytic graphite substrate

2011 ◽  
Vol 519 (6) ◽  
pp. 1882-1885 ◽  
Author(s):  
Iñaki Zalakain ◽  
Jose Angel Ramos ◽  
Raquel Fernandez ◽  
Haritz Etxeberria ◽  
Iñaki Mondragon
Keyword(s):  
Thin Films ◽  
Block Copolymer ◽  
Pyrolytic Graphite ◽  
Graphite Substrate ◽  
Highly Oriented Pyrolytic Graphite ◽  
Self Assembled
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