A Fluoroponytailed NHC-Silver Complex Formed from Vinylimidazolium/AgNO under Aqueous-Ammoniacal Conditions.

3-(1,1,2,2-Perfluorooctyl)-1-vinylimidazolium chloride [2126844-17-3], a strong fluorosurfactant with remarkably high solubility in water, was expediently converted into the respective doubly NHC-complexed silver salt with nitrate as counter ion in quantitative yield. Due to its vinyl substituents, [bis(3-(1,1,2,2-perfluorooctyl)-1-vinylimidazol-2-ylidene)silver(I)] nitrate, , represents a polymerizable -heterocyclic carbene transfer reagent, thus potentially offering simple and robust access to coordination polymers with crosslinking metal bridges. The compound was characterized by infrared and NMR spectroscopy, mass spectrometry as well as elemental analysis, and supplemented by X-ray single-crystal structure determination.

Fluoroponytailed ionic liquids as co-porogens for poly(butyl methacrylate--ethylene dimethacrylate) monolithic supports for thin layer chromatography.

Porous layered monolithic substrates of poly(butyl methacrylate--ethylene dimethacrylate) were synthesized UV initiated free radical polymerization in the presence of fluoroponytailed ionic liquids as co-porogenic constituents. The effects of the type and the amount of selected fluorous ionic liquids on various properties of the monolithic support, porosity, specific surface area and chromatographic performance, in particular for their usability in reversed phase TLC, were examined. Porosity was characterized by means of mercury porosimetry and scanning electron microscopy.

Mechanistic Insights into the Formation of 1-Alkylidene/Arylidene-1,2,4-triazolinium Salts: A Combined NMR/Density Functional Theory Approach.

In a recent report on the synthetic approach to the novel substance class of 1-alkylidene/arylidene-1,2,4-triazolinium salts, a reaction mechanism suggesting a regioselective outcome was proposed. This hypothesis was tested via a combined NMR and density functional theory (DFT) approach. To this end, three experiments with C-labeled carbonyl reactants were monitored by solution-state NMR.

Interactions of Ionic Liquids and Spirocyclic Compounds with Liposome Model Membranes. A Steady-State Fluorescence Anisotropy Study.

Understanding the toxicity of ionic liquids (ILs) is crucial in the search of greener chemicals. By comparing in vivo toxicity and in vitro interactions determined between compounds and biomimetic lipid membranes, more detailed toxicity vs. structure relation can be obtained.

Temperature-Dependent Surface Enrichment Effects in Binary Mixtures of Fluorinated and Non-Fluorinated Ionic Liquids.

Using angle-resolved X-ray photoelectron spectroscopy (ARXPS), we investigate the topmost nanometers of various binary ionic liquid (IL) mixtures at different temperatures in the liquid state. The mixtures consist of ILs with the same [PF ] anion but two different cations, namely 3-methyl-1-(3,3,4,4,4-pentafluorobutyl)imidazolium hexafluorophosphate, [PFBMIm][PF ], and 1-butyl-3-methylimidazolium hexafluorophosphate, [C C Im][PF ], with 10, 25, 50 and 75 mol % content of [PFBMIm][PF ]. We observe a preferential enrichment of the fluorinated chain in the topmost layer, relative to the bulk composition, which is most pronounced for the lowest content of [PFBMIm][PF ].

Crystal structures of [IrCl(NHCHPh)((dppm)(C(Ndppm))-κ ,,')]Cl·5.5MeCN and [IrI(NHCHPh)(((dppm)C(N))-κ ,)(dppm-κ ,')]I(I)·0.5I·MeOH·0.5CHCl: triazene fragmentation in a PCN pincer iridium complex.

The structure of [IrCl(CHNP)]Cl·5.5CHCN or [IrCl(NHCHPh)(((dppm)C(Ndppm))κ )]Cl·5.5CHCN [, dppm = bis-(di-phenyl-phos-phino)methane; systematic name: di-chlorido(1,1,3,3,7,7,9,9-octa-phenyl-4,5-di-aza-1,3λ,7λ,9-tetra-phosphanona-3,5-dien-6-yl-κ , )-(phenyl-methanimine-κ)iridium(III) chloride aceto-nitrile hemihendeca-solvate], resulting from an oxygen-mediated cleavage of a triazeneyl-idene-phospho-rane ligand producing a diazo-methyl-ene-phospho-rane and a nitrene moiety, which in turn rearrange a Staudinger reaction and a 1,2-hydride shift to the first title complex, involves a six-coordinate Ir complex cation coordinated by a PCP pincer ligand, a benzaldimine and two chlorido ligands.

Crystal structures of two PCN pincer iridium complexes and one PCP pincer carbodi-phospho-rane iridium inter-mediate: substitution of one phosphine moiety of a carbodi-phospho-rane by an organic azide.

The structure of [Ir{(4-Cl-CHN)C(dppm)-κ ,,}(dppm-κ ,')]Cl·1.5CHCl·0.5CH (CHClIrNP·1.

Cation Exchange at the Interfaces of Ultrathin Films of Fluorous Ionic Liquids on Ag(111).

In the context of applications with thin ionic liquid (IL) films on solid supports, we studied the ion distribution within mixed thin IL films by angle-resolved X-ray photoelectron spectroscopy. After the deposition of 1-methyl-3-octylimidazolium hexafluorophosphate, [CCIm][PF], on top of a wetting layer (WL) of 3-methyl-1-(3,3,4,4,4-pentafluorobutyl)imidazolium hexafluorophosphate, [PFBMIm][PF], on Ag(111) at room temperature (RT), we find a preferential enrichment of the [PFBMIm] cation at the IL/vacuum interface. In a similar deposition experiment at 82 K, this cation exchange at the IL/solid interface does not occur.

Optimization of an innovative vinylimidazole-based monolithic stationary phase and its use for pressured capillary electrochromatography.

A novel polymer monolith based on the dicationic crosslinker 3,3'-(hexane-1,6-diyl)bis(1-vinylimidazolium) bromide, the monomer 1-vinylimidazole and a ternary porogen mixture (1-propanol, decan-1-ol and water) was developed and optimized for capillary electrochromatography. This aim was accomplished by adjusting the composition of individual constituents in the polymerization mixture and monitored based on several relevant parameters (e.g.

Crystal structures of four new iridium complexes, each containing a highly flexible carbodi-phos-phorane PCP pincer ligand.

Compound [Ir(CH)(CHP)]Cl or [Ir(cod)(CH(dppm)-κ,,)]Cl (), was obtained from [IrCl(cod)] and the carbodi-phospho-rane (CDP) salt [CH(dppm)]Cl [where cod = cyclo-octa-1,5-diene and dppm = bis-(di-phenyl-phosphino)methane]. Treatment of with thallium(I) tri-fluoro-methane-sulfonate [Tl(OTf)] and subsequent crystallization gave complex [Ir(CH)(CHP)](OTf)·CHCOCH·CHCl or [Ir(cod)(CH(dppm)-κ,,)](OTf)·CHCOCH·CHCl () [systematic name: (cyclo-octa-1,5-diene)(1,1,3,3,5,5,7,7-octa-phenyl-1,7-diphospha-3,5-di-phospho-niaheptan-4-yl)iridium(I) bis-(tri-fluoro-methane-sulfonate)-ethyl acetate-di-chloro-methane (1/1/1)]. This five-coordinate iridium(I) complex cation adopts a trigonal-bipyramidal geometry with the CDP carbon and one cod double bond in axial sites.

Crystal structure of an iridium(III) complex of the [C(dppm)] PCP pincer ligand system and its conjugate CH acid form.

After the successful creation of the newly designed PCP carbodi-phospho-rane (CDP) ligand [Reitsamer (2012 ▸). , 3503-3514; Stallinger (2007 ▸). pp.

Liquid-State NMR Analysis of Nanocelluloses.

Recent developments in ionic liquid electrolytes for cellulose or biomass dissolution has also allowed for high-resolution H and C NMR on very high molecular weight cellulose. This permits the development of advanced liquid-state quantitative NMR methods for characterization of unsubstituted and low degree of substitution celluloses, for example, surface-modified nanocelluloses, which are insoluble in all molecular solvents. As such, we present the use of the tetrabutylphosphonium acetate ([P][OAc]):DMSO- d electrolyte in the 1D and 2D NMR characterization of poly(methyl methacrylate) (PMMA)-grafted cellulose nanocrystals (CNCs).

Superhydrophobic Paper from Nanostructured Fluorinated Cellulose Esters.

The development of economically and ecologically viable strategies for superhydrophobization offers a vast variety of interesting applications in self-cleaning surfaces. Examples include packaging materials, textiles, outdoor clothing, and microfluidic devices. In this work, we produced superhydrophobic paper by spin-coating a dispersion of nanostructured fluorinated cellulose esters.

()-2,6-Di-bromo-4-{2-[1-(1,1,2,2-perfluoro-oct-yl)pyridinium-4-yl]ethen-yl}phenolate methanol disolvate, a fluoro-ponytailed solvatochromic dye.

The title compound, CHBrFNO·2CHOH, was obtained by condensation of 4-methyl-1-(1,1,2,2-perfluoro-oct-yl)pyridinium iodide and 3,5-di-bromo-4-hy-droxy-benzaldehyde, followed by deprotonation. It crystallizes as a methanol disolvate and exhibits short O-H⋯O hydrogen bonds and a disordered perfluoro-alkyl chain [occupancy ratio 0.538 (7):0.