Journal ArticleDOI
Inducing all steps of a chemical reaction with the scanning tunneling microscope tip: towards single molecule engineering
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The procedures presented here constitute an important step towards the assembly of individual molecules out of simple building blocks in situ on the atomic scale.Abstract:
All elementary steps of a chemical reaction have been successfully induced on individual molecules with a scanning tunneling microscope (STM) in a controlled step-by-step manner utilizing a variety of manipulation techniques. The reaction steps involve the separation of iodine from iodobenzene by using tunneling electrons, bringing together two resultant phenyls mechanically by lateral manipulation and, finally, their chemical association to form a biphenyl molecule mediated by excitation with tunneling electrons. The procedures presented here constitute an important step towards the assembly of individual molecules out of simple building blocks in situ on the atomic scale.read more
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Impact of urbanization and land-use change on climate
Eugenia Kalnay,Ming Cai +1 more
TL;DR: The difference between trends in observed surface temperatures in the continental United States and the corresponding trends in a reconstruction of surface temperatures determined from a reanalysis of global weather over the past 50 years is used to estimate the impact of land-use changes on surface warming.
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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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Two‐Dimensional Polymers: Just a Dream of Synthetic Chemists?
TL;DR: This analysis compares polymerizations in (initially) a homogeneous phase with those at interfaces and considers structural aspects of monomers as well as possibly preferred connection modes, and briefly touches upon how the chances for a successful structural analysis of the final product can possibly be increased.
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Current-Induced Hydrogen Tautomerization and Conductance Switching of Naphthalocyanine Molecules
TL;DR: A coupling of the switching process so that the charge injection in one molecule induced tautomerization in an adjacent molecule is demonstrated.
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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.
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