Electrochemically driven organic monolayer formation on silicon surfaces using alkylammonium and alkylphosphonium reagents was written by Wang, Dong;Buriak, Jillian M.. And the article was included in Surface Science in 2005.Application In Synthesis of 1-Dodecylpyridin-1-ium bromide This article mentions the following:
The functionalization of Si surfaces with organic monolayers, bound through Si-C bonds, is an area of wide interest due to the technol. promise of organosilicon hybrid devices, but also to study fundamental surface reactivity. The use of alkylammonium and alkylphosphonium cations as sources of organic moieties to bind to hydrogen-terminated flat and porous Si is demonstrated. Tetraalkylammonium, tetraalkyl/arylphosphonium reagents, and alkyl pyridinium salts can be used, but trialkylammonium salts cannot as they yield substantial surface oxidation Under electrochem. conditions, either potentiostatic or galvanostatic modes, alkyl groups derived from the NH4+ or phosphonium salts are grafted to the Si surface and are bound through Si-C bonds. Covalent attachment of the organic monolayers to the surface was demonstrated by XPS, AFM scribing, and FTIR. The mechanism may proceed via reduction of the NH4+ salt yielding alkyl radicals, R•, which may be reduced to R– and attack surface Si-Si bonds, leading to Si-C bonds, or the formation of silyl anions (≡Si–) under the cathodic conditions followed by nucleophilic attack on the trialkylammonium cation. In the experiment, the researchers used many compounds, for example, 1-Dodecylpyridin-1-ium bromide (cas: 104-73-4Application In Synthesis of 1-Dodecylpyridin-1-ium bromide).
1-Dodecylpyridin-1-ium bromide (cas: 104-73-4) belongs to pyridine derivatives. Pyridines are an important class of heterocycles and occur in polysubstituted forms in many naturally occurring biologically active compounds, drug molecules and chiral ligands. Several pyridine derivatives play important roles in biological systems. While its biosynthesis is not fully understood, nicotinic acid (vitamin B3) occurs in some bacteria, fungi, and mammals.Application In Synthesis of 1-Dodecylpyridin-1-ium bromide