Nonlinear vibrational spectroscopic studies on water/ionic liquid([Cnmim]TFSA: n = 4, 8) interfaces

2012 ◽  
Vol 154 ◽  
pp. 289-301 ◽  
Author(s):  
Takashi Iwahashi ◽  
Yasunari Sakai ◽  
Doseok Kim ◽  
Tatsuya Ishiyama ◽  
Akihiro Morita ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Spectroscopic Studies

scholarly journals Chromatographic and spectroscopic studies on β-cyclodextrin functionalized ionic liquid as chiral stationary phase: Enantioseparation of NSAIDs

2017 ◽  
Vol 36 (1-2) ◽  
pp. 130-148 ◽  
Author(s):  
Nurul Yani Rahim ◽  
Kheng Soo Tay ◽  
Sharifah Mohamad
Keyword(s):  
Ionic Liquid ◽  
Stationary Phase ◽  
Chiral Stationary Phase ◽  
Stationary Phases ◽  
Spectroscopic Studies ◽  
Inclusion Complex Formation ◽  
H Nmr ◽  
Inflammatory Drugs ◽  
And Performance ◽  
Multiple Interactions

Recently, we reported a new chiral stationary phase prepared using β-cyclodextrin functionalized with aromatic ionic liquid which is aimed to enhance the performance of enantioseparation of flavonoids and β-blockers. In this paper, the characteristics and performance of previously prepared chiral stationary phase denoted as β-CD-BIMOTs were compared with the newly synthesized chiral stationary phase denoted as β-CD-DIMOTs. β-CD-DIMOTs were prepared by functionalization of β-cyclodextrin with aliphatic ionic liquid. The obtained β-CD-BIMOTs and β-CD-DIMOTs stationary phases were compared with native β-CD stationary phase for the enantioseparation of non-steroidal anti-inflammatory drugs (NSAIDs) (ibuprofen, indoprofen, ketoprofen and fenoprofen). The β-CD-BIMOTs stationary phase showed greater chiral resolution capabilities rather than β-CD-DIMOTs and native β-CD stationary phases. Further, in order to understand the interaction of enantioseparation, the inclusion complex formation between NSAIDs and β-CD-BIMOTs was studied using 1H NMR, NOESY and UV/Vis. The enantioseparated NSAIDs were found to form multiple interactions with β-CD-BIMOTs-CSP.

Structural and spectroscopic studies of the complex [BuMeIm]2[UCl6] in the solid state and in hydrophobic room temperature ionic liquid [BuMeIm][Tf2N]

Polyhedron ◽  
2007 ◽  
Vol 26 (13) ◽  
pp. 3136-3142 ◽  
Author(s):  
Sergey I. Nikitenko ◽  
Christoph Hennig ◽  
Mikhail S. Grigoriev ◽  
Claire Le Naour ◽  
Celine Cannes ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Solid State ◽  
Room Temperature ◽  
Spectroscopic Studies ◽  
Room Temperature Ionic Liquid

Raman Spectroscopic Studies of Ionic Liquid Effects on Electro-conductive PEDOT:PSS Thin Film

Polymer Korea ◽  
2018 ◽  
Vol 42 (1) ◽  
pp. 80-86
Author(s):  
Hyuck Sik Wang ◽  
Seok Hyeon Kim ◽  
Seung Yeun Joe ◽  
Seung Heouk Lee ◽  
Insun Kim ◽  
...  
Keyword(s):  
Thin Film ◽  
Ionic Liquid ◽  
Spectroscopic Studies ◽  
Raman Spectroscopic

scholarly journals NMR Spectroscopic Studies of Cation Dynamics in Symmetrically-Substituted Imidazolium-Based Ionic Liquid Crystals

2020 ◽  
Vol 21 (14) ◽  
pp. 5024
Author(s):  
Debashis Majhi ◽  
Andrei V. Komolkin ◽  
Sergey V. Dvinskikh
Keyword(s):  
Ionic Liquid ◽  
Liquid Crystals ◽  
Liquid Crystalline ◽  
Orientational Order ◽  
Soft Materials ◽  
Spectroscopic Studies ◽  
Single Chain ◽  
Self Assembling ◽  
Ionic Liquid Crystals ◽  
Cation Size

Ionic liquid crystals (ILCs) present a new class of non-molecular soft materials with a unique combination of high ionic conductivity and anisotropy of physicochemical properties. Symmetrically-substituted long-chain imidazolium-based mesogenic ionic liquids exhibiting a smectic liquid crystalline phase were investigated by solid state NMR spectroscopy and computational methods. The aim of the study was to reveal the correlation between cation size and structure, local dynamics, and orientational order in the layered mesophase. The obtained experimental data are consistent with the model of a rod-shaped cation with the two chains aligned in opposite directions outward from the imidazolium core. The alignment of the core plane to the phase director and the restricted conformations of the chain segments were determined and compared to those in single-chain counterparts. The orientational order parameter S~0.5–0.6 of double-chain ionic liquid crystals is higher than that of corresponding single-chain analogues. This is compatible with the enhanced contribution of van der Waals forces to the stabilization of smectic layers. Increased orientational order for the material with Br− counterions, which exhibit a smaller ionic radius and higher ability to form hydrogen bonds as compared to that of BF4−, also indicated a non-negligible influence of electrostatic and hydrogen bonding interactions. The enhanced rod-shape character and higher orientational order of symmetrically-substituted ILCs can offer additional opportunities in the design of self-assembling non-molecular materials.

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