basis of the ion species. The spectral intensity in nonaromatic cation based ILs was much lower than that in aromatic cation based ILs owing to the absence of the aromatic ring, i.e., the libration of the aromatic species had a strong spectral intensity in the low-frequency region. However, nonaromatic cation based ILs with a flat anion, such as dicyanamide and tricyanomethide, showed stronger spectral
在此,报道了通过飞秒拉曼诱导的克尔效应光谱法测量的在293 K下的四十个非芳香族阳离子型离子液体(ILs)的分子间振动数据。通过傅立叶变换反卷积分析获得了0.3–700 cm -1频率范围内的低频频谱。低于〜200 cm -1的低频频谱的线形根据离子种类进行了讨论。由于不存在芳环,因此基于非芳族阳离子的ILs的光谱强度比基于芳族阳离子的ILs的光谱强度低得多,即芳族物质的释放在低频区域具有很强的光谱强度。但是,由于阴离子的释放,具有平面阴离子的非芳香族阳离子基离子分子(如双氰胺和三氰甲基甲烷)显示出更强的光谱强度。在离子物种结构的背景下,还讨论了其他独特的光谱特征。还估计了液体性质,例如密度,粘度,电导率和表面张力。在比较低频光谱和非芳香族阳离子基离子液体的整体液体性质时,
Comprehensive Insights into the Thermal Stability, Biodegradability, and Combustion Chemistry of Pyrrolidinium-Based Ionic Liquids
electrochemical energy‐storage devices is one of the most appealing and emerging options. However, although ILs are hailed as safer and eco‐friendly electrolytes, to overcome the limitations imposed by the highly volatile/combustible carbonate‐based electrolytes, full‐scale and precise appraisal of their overall safety levels under abuse conditions still needs to be fully addressed. With the aim of providing
[(Ph)<sub>3</sub>PBr][Br<sub>7</sub>], [(Bz)(Ph)<sub>3</sub>P]<sub>2</sub>[Br<sub>8</sub>], [(<i>n</i>-Bu)<sub>3</sub>MeN]<sub>2</sub>[Br<sub>20</sub>], [C<sub>4</sub>MPyr]<sub>2</sub>[Br<sub>20</sub>], and [(Ph)<sub>3</sub>PCl]<sub>2</sub>[Cl<sub>2</sub>I<sub>14</sub>]: Extending the Horizon of Polyhalides via Synthesis in Ionic Liquids
作者:Michael Wolff、Alexander Okrut、Claus Feldmann
DOI:10.1021/ic201291k
日期:2011.11.21
[(Ph)3PBr][Br7], [(Bz)(Ph)3P]2[Br8], [(n-Bu)3MeN]2[Br20], [C4MPyr]2[Br20] ([C4MPyr] = N-butyl-N-methylpyrrolidinium), and [(Ph)3PCl]2[Cl2I14] were prepared by the reaction of dibromine and iodine monochloride in ionic liquids. The compounds [(Ph)3PBr][Br7] and [(Bz)(Ph)3P]2[Br8] contain discrete pyramidal [Br7]− and Z-shaped [Br8]2– polybromide anions. [(n-Bu)3MeN]2[Br20] and [C4MPyr]2[Br20] exhibit new infinite
Trivalent sulfonium compounds (TSCs): Tetrahydrothiophene-based amphiphiles exhibit similar antimicrobial activity to analogous ammonium-based amphiphiles
作者:Javier A. Feliciano、Austin J. Leitgeb、Cassandra L. Schrank、Ryan A. Allen、Kevin P.C. Minbiole、William M. Wuest、Robert G. Carden
DOI:10.1016/j.bmcl.2021.127809
日期:2021.4
of quaternary ammonium compounds (QACs) have focused on new structural motifs to increase bioactivity, but significantly less studied has been the change from ammonium- to sulfonium-based disinfectants. Herein, we report the synthesis of structurally analogous series of quaternary ammonium and trivalent sulfonium compounds (TSCs). The bioactivity profiles of these compounds generally mirror each other
Halogen-free pyrrolidinium bis(mandelato)borate ionic liquids: some physicochemical properties and lubrication performance as additives to polyethylene glycol
作者:Mamoun Taher、Faiz Ullah Shah、Andrei Filippov、Patrick de Baets、Sergei Glavatskih、Oleg N. Antzutkin
DOI:10.1039/c4ra02551b
日期:——
Friction coefficients for a pyrrolidinium orthoborate ionic liquid as 3 wt% additive in PEG, neat PEG and 5W40.