Hybrid Redox Polyether Melts Based on Polyether-Tailed Counterions

Dickinson, Enders; Williams, Mary Elizabeth; Hendrickson, Susan M.; Masui, Hitoshi; Murray, Royce W.

doi:10.1021/ja983184e

Cited by 146 publications

(117 citation statements)

References 18 publications

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“…By attaching short polyether chains to crystalline redox moieties, Murray and co-workers introduced a class of highly viscous molecular melts that exhibit electron transport properties (64,65). The initial hybrid redox melts were based on cobalt(II/I) and iron(III/II) bipyridines and exhibited large "inner-sphere"-like energy barriers whose size depended on the length of the attached polyether chain (64).…”

Section: Electrochemistrymentioning

confidence: 99%

“…The initial hybrid redox melts were based on cobalt(II/I) and iron(III/II) bipyridines and exhibited large "inner-sphere"-like energy barriers whose size depended on the length of the attached polyether chain (64). A series of polyethertailed counterions for ruthenium hexamine, metal trisbipyridines, metal trisphenanthrolines, and ionic forms of aluminum quinolate, anthraquinone, phthalocyanine, and porphyrins were introduced to extend the number of hybrid redox polyether melts (65). These melts generally exhibited ionic conductivities in the range 7 ϫ 10 -5 to 7 ϫ 10 -10 S/cm.…”

Section: Electrochemistrymentioning

confidence: 99%

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Ionic Liquids in Analytical Chemistry

Anderson¹,

Armstrong²,

Wei³

2006

Anal. Chem.

492

326

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oom-temperature ionic liquids (RTILs), also known as liquid organic, molten, or fused salts, are a class of nonmolecular ionic solvents with low melting points. The accepted definition of an RTIL is any salt that has a melting point lower than ambient temperature (1). However, "ionic liquid" (IL) is often applied to any compound that has a melting point <100°C. Most common RTILs are composed of unsymmetrically substituted nitrogen-containing cations (e.g., imidazole, pyrrolidine, pyridine) with inorganic anions (e.g., Cl -, PF 6 -, BF 4 -). ILs are also interesting because of their other useful and intriguing physicochemical properties. Wilkes et al. first reported ambient-temperature ILs based on the 1-alkyl-3-methylimidazolium cation in 1982 (2). Since then, many ILs containing a variety of cations and anions of different sizes have been synthesized to provide specific characteristics.Over the past few years, research and applications of ILs have expanded tremendously. The initial impetuses for this expansion were organic synthesis and the growth of green chemistry. In this article, we will give an overview of the structure and properties of ILs and describe their expanding use in various applications in separations and chromatography, MS, spectroscopy, and electrochemistry. Description and propertiesILs have negligible vapor pressures at room temperature, possess a wide range of viscosities, can be custom-synthesized to be miscible or immiscible, often have high stability, and are capable of un-

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Section: Electrochemistrymentioning

confidence: 99%

Section: Electrochemistrymentioning

confidence: 99%

Ionic Liquids in Analytical Chemistry

Anderson¹,

Armstrong²,

Wei³

2006

Anal. Chem.

492

326

View full text Add to dashboard Cite

show abstract

“…In recent years, RTILs have attracted great attentions due to their unique chemical and physical properties such as nonvolatile (environmentally benign), excellent solvation qualities, non-flammable and high thermal stability [22,23]. As a result, RTILs are widely used in liquid-liquid extraction [24,25], synthesis [26,27], separation [28,29] and electrochemistry [30,31]. Some research groups have also studied the aggregation and micelles formation of ionic liquids in aqueous solution [32].…”

Section: Introductionmentioning

confidence: 99%

Analysis of phthalates via HPLC-UV in environmental water samples after concentration by solid-phase extraction using ionic liquid mixed hemimicelles

Cai

Shi

et al. 2008

Talanta

157

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Ionic liquid mixed hemimicelles-based solid-phase extraction for the preconcentration of five phthalates in environmental water sample was investigated in this paper. A comparative study on the use of room temperature ionic liquids (RTILs) 1-hexyl-3-methylimidazolium bromide ([C 6 mim]Br) and 1-dodecyl-3-methylimidazolium bromide ([C 12 mim]Br)-coated silica as sorbents was presented. Owing to having bigger adsorption amounts for analytes [C 12 mim], Br-coated silica was selected as SPE material and the five analytes di-ethyl-phthalate (DEP), di-n-propyl-phthalate (DnPP), di-n-butyl-phthalate (DnBP), di-cyclohexyl-phthalate (DcHP) and di-(2-ethylhexyl)-phthalate (DEHP) can be quantitatively extracted under optimal conditions. The analytes retained on the cartridge were desorbed completely with 3 mL methanol (pH 2). Predominant factors influencing the extraction efficiency, such as RTILs concentration, pH value, ionic strength and breakthrough volume were discussed. The proposed method had been applied to determining the five phthalates in four environmental water samples and concentration factor of 600 was achieved easily. Detection limits obtained ranged between 0.12 and 0.17 g/L. The accuracy of this method was evaluated by recovery measurement on spiked samples, and good recovery results (85-107%) with relative standard deviation (R.S.D.) of below 6% were achieved.

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“…ILs are organic salts with low melting temperature (< 100°C), composed of ions, and exhibiting high thermal stability. These liquids have interesting chemical and physical properties including large electrochemical window, high chemical and thermal stability, non-volatility, controlled miscibility, non-flammability, negligible vapor pressure, and good electrical stability for separations [19,20] and electrochemistry [21]. Ionic liquids can act as solvents for reactants and as morphology templates for the products at the same time, which enables the synthesis of inorganic materials with improved properties [22].…”

Section: Introductionmentioning

confidence: 99%

A green chemical route for the synthesis of Mn3O4 nanoparticles

et al. 2009

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A novel environmental friendly, room temperature route using an ionic liquid 1-n-butyl-3-methylimidazolium hydroxide ([BMIM]OH) for the synthesis of Mn 3 O 4 nanoparticles is presented. The product was characterized using Fourier transform infrared spectroscopy, X-ray powder diffraction, and transmission electron microscopy. Phase purity was confirmed by XRD, and X-ray line profile fitting determined a crystallite size of 42 ± 11 nm. TEM analysis revealed various morphologies. EPR measurements have indicated the existence of long-range interactions, due to the wide range of particle sizes and morphologies observed .© Versita Warsaw and Springer-Verlag Berlin Heidelberg.

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Hybrid Redox Polyether Melts Based on Polyether-Tailed Counterions

Cited by 146 publications

References 18 publications

Ionic Liquids in Analytical Chemistry

Ionic Liquids in Analytical Chemistry

Analysis of phthalates via HPLC-UV in environmental water samples after concentration by solid-phase extraction using ionic liquid mixed hemimicelles

A green chemical route for the synthesis of Mn3O4 nanoparticles

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