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Task-Specific Ionic Liquid (task-specific + ionic_liquid)

Distribution by Scientific Domains

Chemistry	100%

Distribution within Chemistry

Organic Chemistry	55%
General & Introductory Chemistry	33%

Selected Abstracts

Towards an Efficient Microsystem for the Real-Time Detection and Quantification of Mercury in Water Based on a Specifically Designed Fluorogenic Binary Task-Specific Ionic Liquid,

ANGEWANDTE CHEMIE, Issue 2 2010
Faïdjiba Loe-Mie
Schneller Quecksilbernachweis: Ein Mikrosystem für die Flüssig-flüssig-Extraktion und den Nachweis von Quecksilberionen in Wasser nutzt eine ionische Flüssigkeit mit maßgeschneidertem fluorogenem Salz (L1) als extrahierende Flüssigphase. Das An- und Ausschaltverhalten senkt die Wahrscheinlichkeit falsch positiver Resultate und ermöglicht den Nachweis von 50,ppb Hg2+ in wässriger Lösung. [source]

Decomposition of Formic Acid Catalyzed by a Phosphine-Free Ruthenium Complex in a Task-Specific Ionic Liquid

CHEMCATCHEM, Issue 10 2010
Jackson D. Scholten
Abstract The dehydrogenation of formic acid is effectively catalyzed by the Ru complex [{RuCl2(p -cymene)}2] dissolved in the ionic liquid (IL) 1-(2-(diethylamino)ethyl)-3-methylimidazolium chloride at 80,°C without additional bases. This catalytic system gives TOF values of up to 1540,h,1. Preliminary kinetic insights show formal reaction orders of 0.70(±0.15), 0.78(±0.03) and 2.00(±0.17) for the Ru catalyst, IL,1, and formic acid, respectively. The apparent activation energy of this process is estimated to be (69.1±7.6),kJ,mol,1. In addition, dimeric Ru hydride ionic species involved in the reaction, such as [{Ru(p -cymene)}2{(H),-(H)-,-(HCO2)}]+ and [{Ru(p -cymene)}2{(H),-(Cl),-(HCO2)}]+, are identified by mass spectrometry. The presence of water in large amounts inhibits higher conversions. Finally, a remarkable catalytic activity is observed during recycles, indicating this system's potential for hydrogen gas production. [source]

A Green and Efficient Synthesis of 9-Aryl-3,4,5,6,7,9-hexahydroxanthene-1,8-dione Using a Task-Specific Ionic Liquid as Dual Catalyst and Solvent.

CHEMINFORM, Issue 27 2007
Jingjun Ma
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source]

A Task-Specific Ionic Liquid [bmim]SCN for the Conversion of Alkyl Halides to Alkyl Thiocyanates at Room Temperature.

CHEMINFORM, Issue 25 2005
Ahmed Kamal
Abstract For Abstract see ChemInform Abstract in Full Text. [source]

Task-Specific Ionic Liquids as Efficient, Green and Recyclable Reagents and Solvents for Oxidation of Olefins.

CHEMINFORM, Issue 45 2005
Zhiming Wang
Abstract For Abstract see ChemInform Abstract in Full Text. [source]

ChemInform Abstract: Task-Specific Ionic Liquids for the Extraction of Metal Ions from Aqueous Solutions

CHEMINFORM, Issue 17 2001
Ann E. Visser
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

Maleimide-Modified Phosphonium Ionic Liquids: A Template Towards (Multi)Task-Specific Ionic Liquids

CHEMISTRY - A EUROPEAN JOURNAL, Issue 30 2010
Jocelyn
Abstract The synthesis and characterization of several compounds representing a new class of multitask-specific phosphonium ionic liquids that contain a maleimide functionality is reported. The maleimide moiety of the ionic liquid (IL) is shown to undergo Michael-type additions with substrates containing either a thiol or amine moiety, thus, serving as a template to introduce wide structural diversity into the IL. Multitask-specific ILs are accessible by reaction of the maleimide with Michael donors that are capable of serving some function. As a model example to illustrate this concept, a redox active ferrocenyl thiol was incorporated and examined by cyclic voltammetry. Because the maleimide moiety is highly reactive to additions, the task-specific ionic liquids (TSILs) are prepared as the furan-protected Diels,Alder maleimide. The maleimide moiety can then be liberated when required by simple heating. [source]

TEMPO and Carboxylic Acid Functionalized Imidazolium Salts/Sodium Nitrite: An Efficient, Reusable, Transition Metal-Free Catalytic System for Aerobic Oxidation of Alcohols

ADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 13 2009
Cheng-Xia Miao
Abstract An effective catalytic system comprising a 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) functionalized imidazolium salt ([Imim-TEMPO]+,X,), a carboxylic acid substituted imidazolium salt ([Imim-COOH]+,X,), and sodium nitrite (NaNO2) was developed for the aerobic oxidation of aliphatic, allylic, heterocyclic and benzylic alcohols to the respective carbonyl compounds with excellent selectivity up to >99%, even at ambient conditions. Notably, the catalyst system could preferentially oxidize a primary alcohol to the aldehyde rather than a secondary alcohol to the ketone. Moreover, the reaction rate is greatly enhanced when a proper amount of water is present. And a high turnover number (TON 5000) is achieved in the present transition metal-free aerobic catalytic system. Additionally, the functionalized imidazolium salts are successfully reused at least four times. This process thus represents a greener pathway for the aerobic oxidation of alcohols into carbonyl compounds by using the present task-specific ionic liquids in place of the toxic and volatile additive, such as hydrogen bromide, bromine, or hydrogen chloride (HBr, Br2 or HCl), which is commonly required for the transition metal-free aerobic oxidation of alcohols. [source]