Ionic Liquids: The Neglected Issues

Scammells, Peter J.; Scott, Janet L.; Singer, Robert D.

doi:10.1071/ch04272

Cited by 267 publications

(210 citation statements)

References 114 publications

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“…Scammells et al [7] pointed out in this journal that ionic liquids may not be as 'green' as many authors had claimed, because of several issues which, at the time, had been sorely neglected. They highlighted the dearth of data concerning the biodegradation, toxicity, and methods of recycling the ionic liquids that were being claimed as 'benign solvents'.…”

Section: Biodegradability and Toxicity?mentioning

confidence: 99%

Ionic Liquids—Progress on the Fundamental Issues

MacFarlane¹,

Seddon²

2007

Aust. J. Chem.

367

258

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Section: Biodegradability and Toxicity?mentioning

confidence: 99%

Ionic Liquids—Progress on the Fundamental Issues

MacFarlane¹,

Seddon²

2007

Aust. J. Chem.

367

258

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“…[3][4][5][6] Less understood, but now of great interest, are the associated chemical properties that manifest in the condensed phase such as relative basicity (or acidity), oxidative (or reductive) capacity, thermal stability, electrochemical reactivity, and catalytic or combustion efficiency of the component ions. [7][8][9] Recent interest in room temperature ionic liquids has grown immensely, as their synthetic routes have been optimized. The number of publications involving ionic liquid chemistry has grown exponentially in the past decade.…”

Section: Introductionmentioning

confidence: 99%

Fourier Transform Infrared Studies in Hypergolic Ignition of Ionic Liquids

et al. 2008

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Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. REPORT DATE (DD-MM-YYYY) SPONSORING / MONITORING AGENCY NAME(S) AND ADDRESS(ES) 10. SPONSOR/MONITOR'S ACRONYM(S)Air Force Research Laboratory (AFMC) AFRL/RZS SPONSOR/MONITOR'S Pollux Drive NUMBER(S)Edwards AFB CA 93524-70448 AFRL-RZ-ED-JA-2008-090 DISTRIBUTION / AVAILABILITY STATEMENTApproved for public release; distribution unlimited (PA# 08149A) SUPPLEMENTARY NOTESPublished in J. Phys. Chem. A 2008, 112, 7816-7824. © 2008 American Chemical Society. ABSTRACTA class of room temperature ionic liquids (RTILs) that exhibit hypergolic activity towards strong nitric acid is reported. Fast ignition of dicyanamide ionic liquids when mixed with nitric acid is contrasted with the reactivity of the ionic liquid azides, which show high reactivity with nitric acid, but do not ignite. The reactivity of other potential salt fuels is assessed here. Rapid-scan, Fourier Transform infrared (FTIR) spectroscopy of the pre-ignition phase indicates the evolution of N 2 O from both the dicyanamide and azide RTILs. Evidence for the evolution of CO 2 and isocyanic acid (HNCO) with similar temporal behavior to N 2 O from reaction of the dicyanamide ionic liquids with nitric acid is presented. Evolution of HN 3 is detected from the azides. No evolution of HCN from the dicyanamide reactions was detected. From the FTIR observations, biuret reaction tests and initial ab initio calculations, a mechanism is proposed for the formation of N 2 O, CO 2 and HNCO from the dicyanamide reactions during pre-ignition. SUBJECT TERMS SECURITY CLASSIFICATION OF:17 ReceiVed: April 28, 2008; ReVised Manuscript ReceiVed: June 2, 2008 A class of room-temperature ionic liquids (RTILs) that exhibit hypergolic activity toward fuming nitric acid is reported. Fast ignition of dicyanamide ionic liquids when mixed with nitric acid is contrasted with the reactivity of the ionic liquid azides, which show high reactivity with nitric acid, but do not ignite. The reactivity of other potential salt fuels is assessed here. Rapid-scan, Fourier transform infrared (FTIR) spectroscopy of the preignition phase indicates the evolution of N 2 O from both the dicyanamide and azide...

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“…The air and moisture-sensitive L 1 Á 4 were prepared in good yields (53Á67%) from the commercially available corresponding alcohols (14,15) by reaction with phosphorus trichloride in diethyl ether in the presence of pyridine (Equation 1, Scheme 6). These ligands were used for the hydroformylation of 1-octene using catalytic precursors system [Rh(a-…”

Section: R Skoutamentioning

confidence: 99%

Selective chemical reactions in supercritical carbon dioxide, water, and ionic liquids

Skouta

2009

Green Chemistry Letters and Reviews

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Ionic Liquids: The Neglected Issues

Cited by 267 publications

References 114 publications

Ionic Liquids—Progress on the Fundamental Issues

Ionic Liquids—Progress on the Fundamental Issues

Fourier Transform Infrared Studies in Hypergolic Ignition of Ionic Liquids

Selective chemical reactions in supercritical carbon dioxide, water, and ionic liquids

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