Journal ArticleDOI
Fabrication of surface-supported low-dimensional polyimide networks.
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It is shown, using low-temperature scanning tunneling microscopy, that imidization of anhydrides and amines adsorbed on Au(111) can be thermally initiated under controlled ultrahigh vacuum conditions.Abstract:
Interest in thermal and chemical stability of surface-supported organic networks has stimulated recent attempts to covalently interlink adsorbed molecular species into extended nanostructures. We show, using low-temperature scanning tunneling microscopy, that imidization of anhydrides and amines adsorbed on Au(111) can be thermally initiated under controlled ultrahigh vacuum conditions. Using two types of amine-functionalized polyphenyl molecules together with the organic semiconductor PTCDA, monolayer thick linear polymeric strands and a porous polymeric network with nanoscale dimensions are obtained.read more
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Rationally synthesized two-dimensional polymers
John Colson,William R. Dichtel +1 more
TL;DR: This Review describes successful 2D polymerization strategies, as well as seminal research that inspired their development, and describes the early application targets of 2D polymers, each of which might benefit from predictable long-range molecular organization inherent to this macromolecular architecture.
Journal ArticleDOI
Porous graphenes: two-dimensional polymer synthesis with atomic precision
Marco Bieri,Matthias Treier,Jinming Cai,Kamel Aït-Mansour,Pascal Ruffieux,Oliver Gröning,Pierangelo Gröning,Marcel Kastler,Ralph Rieger,Xinliang Feng,Klaus Müllen,Roman Fasel,Roman Fasel +12 more
TL;DR: By surface-assisted coupling of specifically designed molecular building blocks, the fabrication of regular two-dimensional polyphenylene networks with single-atom wide pores and sub-nanometer periodicity is demonstrated.
Journal ArticleDOI
Molecular and Supramolecular Networks on Surfaces: From Two-Dimensional Crystal Engineering to Reactivity
TL;DR: Recent developments in the design and functionality of supramolecular surface patterns are highlighted, with special attention paid to those networks which are chiral or contain a high degree of porosity as well as to the reactivity, which is one of the most important recent developments in supramolescular surface chemistry.
Journal ArticleDOI
Controlling on-surface polymerization by hierarchical and substrate-directed growth
Leif Lafferentz,Leif Lafferentz,Volker Eberhardt,Carlo Dri,Cristina Africh,Giovanni Comelli,Friedrich Esch,Stefan Hecht,Leonhard Grill +8 more
TL;DR: This work presents a strategy for the covalent connection of molecules in a hierarchical manner by the selective and sequential activation of specific sites, thereby generating species with a programmed reactivity and enables the fabrication of heterogeneous architectures with high selectivity.
Journal ArticleDOI
Two-dimensional polymer formation on surfaces: insight into the roles of precursor mobility and reactivity
Marco Bieri,Manh-Thuong Nguyen,Oliver Gröning,Jinming Cai,Matthias Treier,Kamel Aït-Mansour,Pascal Ruffieux,Carlo A. Pignedoli,Daniele Passerone,Marcel Kastler,Klaus Müllen,Roman Fasel +11 more
TL;DR: It is shown that different balances between diffusion and intermolecular coupling determine the observed branched and compact polyphenylene networks on the Cu and Ag surface, respectively, demonstrating that the choice of the substrate plays a crucial role in the formation of two-dimensional polymers.
References
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Development and use of quantum mechanical molecular models. 76. AM1: a new general purpose quantum mechanical molecular model
TL;DR: In this paper, a new parametric quantum mechanical molecular model, AM1 (Austin Model l), based on the NDDO approximation, is described, in which the major weaknesses of MNDO, in particular failure to reproduce hydrogen bonds, have been overcome without any increase in computing time.
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TL;DR: The most relevant features of WSXM, a freeware scanning probe microscopy software based on MS-Windows, are described and some relevant procedures of the software are carried out.
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Nano-architectures by covalent assembly of molecular building blocks
TL;DR: It is shown that covalently bound molecular nanostructures can be formed on a gold surface upon thermal activation of porphyrin building blocks and their subsequent chemical reaction at predefined connection points, and it is demonstrated that the topology of these nanostructure can be precisely engineered by controlling the chemical structure of the building blocks.
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Controlling molecular deposition and layer structure with supramolecular surface assemblies
TL;DR: This work uses hydrogen bonding to guide the assembly of two types of molecules into a two-dimensional open honeycomb network that then controls and templates new surface phases formed by subsequently deposited fullerene molecules, and finds that the open network acts as aTwo-dimensional array of large pores of sufficient capacity to accommodate several large guest molecules.
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Molecular architectonic on metal surfaces.
TL;DR: This review delineates the principles of noncovalent synthesis on metal substrates under ultrahigh vacuum conditions and briefly assesses the pertaining terminology-self-assembly, self-organization, and self-organized growth.