Effect of anion and alkyl chain length on the structure and interactions of N-alkyl pyridinium ionic liquids was written by Potangale, Mangesh;Das, Abhishek;Kapoor, Sudhir;Tiwari, Shraeddha. And the article was included in Journal of Molecular Liquids in 2017.SDS of cas: 104-73-4 This article mentions the following:
The structure and interactions of a series of ionic liquids composed of N-alkyl pyridinium cation ([CnPy]+, n = 2, 4, 6, 8, 10, 12, 14) with varied anions like bromide (Br–), tetrafluoroborate ([BF4]–), bis(trifluoromethanolsulfonyl)imide ([NTf2]–) and hexafluorophosphate ([PF6]–) were investigated using ATR – FTIR and Raman spectroscopy. The observed frequencies were compared to the frequencies computed by means of DFT theory at the B3LYP/6-311++G(d,p) level. Significant variations were observed in the vibrational spectra of the pyridinium based ionic liquids, with increasing chain length of the alkyl group in the cation. The nature and extent of the chain-length dependent variations in the spectra was also dependent on the anionic species present in the sample. Comparison of the observed spectra to the computed spectra and previously reported data for imidazolium based ionic liquids indicated mesoscopic segregation of polar and nonpolar regions in the pyridinium ionic liquids The strength of the cation-anion interaction determines the nature and extent of such microscopic heterogeneity, which was reflected in the anion-specific variations in the vibrational spectra. While the mesoscopic reorganization of pyridinium based ionic liquids was analogous to that in imidazolium based ionic liquids, some important differences were also noted. The observations highlighted the importance of all three structural features – cation, anion and alkyl chain length – in determining the microscopic organization and properties of ionic liquids The results emphasized the need for broadening the scope of ionic liquid research to include more studies on the non-imidazolium based ionic liquids In the experiment, the researchers used many compounds, for example, 1-Dodecylpyridin-1-ium bromide (cas: 104-73-4SDS of cas: 104-73-4).
1-Dodecylpyridin-1-ium bromide (cas: 104-73-4) belongs to pyridine derivatives. The pyridine ring occurs in many important compounds, including agrochemicals, pharmaceuticals, and vitamins. Pyridine groups exist in countless molecules, and their applications include catalysis, drug design, molecular recognition, and natural product synthesis.SDS of cas: 104-73-4