Triethylammonium cation

Figure 14.7 MALDI spectra of the MALDI matrix DHB (upper) and the ionic liquid matrix formed by equimolar mixture of DHB and triethylamine (lower). The triethylammonium-cation is the only signal in the spectrum of the ILM, the signal corresponding to DHB (as well as adducts and fragments thereof) are suppressed in the ILM. (From Tholey, A. and Heinzle, E., Anal. Bioanal. Chem., 386, 24, 2006. With permission from Springer, Heidelberg, Germany.)...

Transalkylation reactions are observed in Y zeolites partially exchanged with ethyl-, diethyl-, and triethylammonium cations (EA, DEA, and TEA, respectively) heated above 150° C in air or under vacuum, in the presence of residual water molecules. The main reactions may be depicted schematically as follows (EA) Y — (DEA)Y > (NHt+)Y, (DEA)Y - (EA)Y > (TEA)Y, and (TEA)Y - (DEA)Y > (EA)Y, iAc main constituent in the gas phase being CJh. They are similar to those observed in montmorillonite in the presence of a water vapor pressure of a few torr. It is proposed that in both cases the transalkylation processes are acid catalyzed, the residual water molecules and the surface oxygen being the active spots recycling the protons in montmorillonite and zeolite, respectively. 

Murayama and Aoki have also revealed the ability of a resorcin[4]arene to assemble with hydroxylated solvent molecules to form an assembly with a structure that conforms to a tetragonal prism. Specifically, two tetraethylresorcin[4]arenes assembled with eight water molecules to give an anionic capsule in the solid state.55 The capsule accommodated a tetraethylammonium cation, which interacted with the inner walls of the host via cation-Tt forces. Similar assemblies involving derivatized resorcin[4]arenes have also been described.56 In particular, the resorcin[4]arene of Aoki et al.56 was also shown to assemble with 10 water molecules to give a capsule that hosted both a triethylammonium cation and a water molecule.57 The encapsulated guests assembled via a N+-H O-hydrogen bond. Shivanyuk et al. have also described the ability of two hydroxylated resorcin[4]arenes to assemble with 16 water molecules to form a capsule that accommodated either four acetonitrile molecules or a quinuclidinium ion.58... 

C2-symmetric tetraester resorcin[4]arenes have been shown by Shivanyuk et al. to form capsules that host two triethylammonium cations.59 The capsules were held together by hydrogen bonds that involve chloride anions located along the peripheries of the assemblies. 

Corn oil-based polymer resin, prepared by the cationic polymerisation of conjugated corn oil, styrene and divinylbenzene, using boron trifluoride diethyl etherate modifled by Norway fish oil as the initiator with 4-vinylbenzyl triethylammonium cation modified montmorillonite clay (VMMT) nanocomposites were reported. The resultant nanocomposites with 2-3 wt% VMMT exhibited significant around two-fold improvements in tensile modulus, tensile strength and toughness when compared to the pristine polymer. There is an improvement in thermal stability up to 400°C in the nanocomposites. ... 

The early investigations by Kohler and co-workers into 1 1 mixtures of carboxylic acids with primary, secondary, or tertiary alkylamines suggested that there were aggregates present. The triethylammonium cation appears to have a strong preference for the formation of A3B1 aggregates (A = acid, B = base), with free amine present at the 1 1 composition. " The primary and secondary amines investigated showed a preference toward the 1 1 complexes. " ... 

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