نتایج جستجو برای: imidazolium cation

تعداد نتایج: 57508  

2015
Ana B. Pinar Lynne B. McCusker Christian Baerlocher Son-Jong Hwang Dan Xie Annabelle Benin Stacey I. Zones

A study exploring the use of ionic liquid reactions based on imidazolium halides in molecular sieve synthesis has produced a novel zincoaluminophosphate material with an open DFO-type framework structure. This framework structure had only been observed previously in the magnesioaluminophosphate system (Mg-DAF-1) where decamethonium was used as the structure directing agent. The new Zn-DAF-1 mat...

2016
Quinn Dickinson Scott Bottoms Li Hinchman Sean McIlwain Sheena Li Chad L. Myers Charles Boone Joshua J. Coon Alexander Hebert Trey K. Sato Robert Landick Jeff S. Piotrowski

BACKGROUND Imidazolium ionic liquids (IILs) underpin promising technologies that generate fermentable sugars from lignocellulose for future biorefineries. However, residual IILs are toxic to fermentative microbes such as Saccharomyces cerevisiae, making IIL-tolerance a key property for strain engineering. To enable rational engineering, we used chemical genomic profiling to understand the effec...

Journal: :Organic & biomolecular chemistry 2012
Graeme T Spence Nicholas G White Paul D Beer

The effect of varying the size of the macrocycle component on the formation of anion templated imidazolium interpenetrated assemblies is investigated. Two different approaches to reducing the macrocycle size are undertaken and the stabilities of the resulting pseudorotaxanes incorporating substituted imidazolium threading components studied using (1)H NMR spectroscopy. Novel imidazolium axle co...

Journal: :Journal of Organometallic Chemistry 2021

We report herein the synthesis of a new NHC-stabilised borane complex featuring weakly coordinating anion, namely pentaorganosilicate, on NHC backbone. The can be achieved from zwitterionic abnormal silicate-imidazolium adduct by deprotonation with strong base followed quenching transfer agent. Alternatively, IPr-BH3 also deprotonated and resulting vinylanion is trapped tetravalent spirosilane....

Journal: :Molecules 2011
Rachel R Butorac Salem S Al-Deyab Alan H Cowley

The syntheses of four new bis(imino)acenaphthene (BIAN) imidazolium chlorides are reported, three of which have been structurally characterized. The synthesis of a new, structurally authenticated BIAN ligand is also described. We report the results of the use of these BIAN imidazolium salts as antimicrobials against the pathogens S. aureus, B. subtilis, E. coli and P. aeruginosa. The antimicrob...

2009
Maria Georgiou Simone Wöckel Franc Meyer

A set of pyrazole-bridged bis(imidazolium) compounds [H3L]X2 – [H3L]X2 (L1 = 3,5-bis[1-(tert-butyl)imidazolium-1-ylmethyl]-1H-pyrazole; L2 = 3,5-bis[1-(tert-butyl)imidazolium-1-ylmethyl]-4-phenyl-1H-pyrazole; L3 = 3,5-bis[1-(1-adamantyl)imidazolium-1-ylmethyl]-1Hpyrazole; L4 = 3,5-bis[1-(1-adamantyl)imidazolium-1-ylmethyl]-4-phenyl-1H-pyrazole; X = Cl−, BF4− or PF6−) has been prepared, and thre...

Journal: :Molecules 2017
Paloma Vinaches Katia Bernardo-Gusmão Sibele B C Pergher

Zeolite synthesis is a wide area of study with increasing popularity. Several general reviews have already been published, but they did not summarize the study of imidazolium species in zeolite synthesis. Imidazolium derivatives are promising compounds in the search for new zeolites and can be used to help understand the structure-directing role. Nearly 50 different imidazolium cations have alr...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2008
Satoshi Kitaoka Kaoru Nobuoka Yuichi Ishikawa Akihiro Wakisaka

We have studied the cluster structure of 1-butyl-3-methylimidazolium halide, bmimX (X = Cl, Br, I), in methanol solution by means of an electrospray mass spectrometer, which is specially designed for analysis of clusters isolated from solution. In positive ion mode experiments, the ratio of solvated bmim(+), bmim(+)(MeOH)(n) and ion-pair clusters, bmim(bmim(+)X(-))(m) was dependent on the count...

Journal: :Catalysts 2023

We present an ARXPS study on the surface composition and interfacial behavior of commercial [Rh(COD)2][TfO] in [C2C1Im][TfO], [C4C1Im][TfO], [C8C1Im][TfO], [C2C1Im][EtOSO3]. The complex was found to be non-intact a solution these ILs through loss COD ligands, accompanied by depletion metal center from IL/vacuum interface. Increasing chain length aliphatic substituent imidazolium cation [TfO]−-b...

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