منابع مشابه
Modulating NHC catalysis with fluorine
Fluorination often confers a range of advantages in modulating the conformation and reactivity of small molecule organocatalysts. By strategically introducing fluorine substituents, as part of a β-fluoroamine motif, in a triazolium pre-catalyst, it was possible to modulate the behaviour of the corresponding N-heterocyclic carbene (NHC) with minimal steric alterations to the catalyst core. In th...
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Among the problems affecting the current version of TCP are the slow recovery upon a coarse timeout expiration on long, fat pipes, and the reaction to random segment losses. Both problems are known to reduce the throughput of a connection. In our paper, we propose and evaluate the merits of a class of TCP modifications obtained through a source-based estimate of the available bandwidth by measu...
متن کاملIntroduction of fluorine and fluorine-containing functional groups.
Over the past decade, the most significant, conceptual advances in the field of fluorination were enabled most prominently by organo- and transition-metal catalysis. The most challenging transformation remains the formation of the parent C-F bond, primarily as a consequence of the high hydration energy of fluoride, strong metal-fluorine bonds, and highly polarized bonds to fluorine. Most fluori...
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The generated resist based defects on the template in addition to the presence of particles and contaminants is critical for ultraviolet curing of nanoimprint lithographic fabrication. This procedure is proven to be suitable for advanced resist material design under the process conditions. Nanoimprint resist material containing an ultraviolet reactive fluorine surfactant was developed to modify...
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ژورنال
عنوان ژورنال: Nature Nanotechnology
سال: 2007
ISSN: 1748-3387,1748-3395
DOI: 10.1038/nnano.2007.304