Prototropic behavior of norharmane within ionic liquids
3
Citation
35
Reference
10
Related Paper
Citation Trend
Keywords:
Absorbance
Tetrafluoroborate
Imide
Cite
Citations (6)
Dye-binding methods based on protein error for determining human serum albumin are classified into two methodologies via measurements of the absorbance increase under an acidic condition (absorbance increase method) and the absorbance decrease in a pH region near the neutral condition (absorbance decrease method). The color development of protein in the absorbance increase method is known to be affected by the pH, and the concentrations of dye, buffer and coexisting anions in the samples. However, the effect of coexisting anions on color development in the absorbance decrease method is unclear. In the present work, the effect of an inorganic salt on color development in the absorbance decrease method was investigated by a calculation based on the chemical equilibrium of the protein error and an experiment, and was compared with the results of the absorbance increase method. By adding an inorganic salt, the absorbance was decreased. The degree of its decrease was smaller in the absorbance decrease method than in the absorbance increase method, and differed according to the kind of inorganic salt. The experimental results agreed well with those obtained by a calculation.
Absorbance
Cite
Citations (0)
3-Methyl-1-(propyloxycarbonylmethyl)imidazolium octylsulfate 1a and 3-methyl-1-(pentyloxycarbonylmethyl)imidazolium octylsulfate 2a are ionic liquids that have previously been shown to be readily biodegradable in the CO2 headspace test (ISO 14593). In the present study, these ionic liquids were evaluated as reaction media for Diels–Alder and hydrogenation reactions. The comparison of the performance of these two designer solvents in these reactions with those conducted in other, non-biodegradable ionic liquids has demonstrated that they are comparable and viable solvents.
Biocatalysis
Cite
Citations (33)
Abstract The dichotomic nature of ionic liquids (ILs, simple solvents or supramolecular fluids) induced us to carry out a structural investigation of some mono‐ and dicationic ionic liquids using 1D and 2D NMR, resonance light scattering, and UV/Vis spectroscopy. Ionic liquids with different cation π‐surface areas were used, namely [bmim][NTf 2 ], [Bzmim][NTf 2 ], [Bzbim][NTf 2 ], [ p ‐Xyl‐(bim) 2 ][NTf 2 ] 2 , and [ m ‐Xyl‐(bim) 2 ][NTf 2 ] 2 [bmim = 1‐butyl‐3‐methylimidazolium, Bzmim = 1‐benzyl‐3‐methylimidazolium, Bzbim = 1‐benzyl‐3‐butylimidazolium, NTf 2 = bis(trifluoromethansulfonyl)imide]. In order to verify to what extent the structural investigation, coupled with the determination of solvent parameters, could help to rationalize the effects of the solvent media on a given reaction, the thermally induced mononuclear rearrangement of heterocycles was studied. Variation of the cation structure has significant repercussions on the 3D structure of the ILs and on the effect they can exert on a given reaction.
Imide
Cite
Citations (41)
As a new biocatalytic reaction media,ionic liquids have caused extensive interests because of their special characteristics compared to the conventional organic solvents.In this review,the biocompatibility of ionic liquids was discussed,including the toxicity of ionic liquids to microbial cells and enzymatic activities in ionic liquids.The recent advances on biotransformation in different ionic liquid-containing systems were then summarized,such as biocatalytic reactions in ionic liquid/supercritical carbon dioxide biphasic media,biphasic ionic liquid/water-systems and water-miscible ionic liquids as solvents,respectively.Meanwhile,further study on the application of ionic liquids for bioconversion was also put forward.
Bioconversion
Biocatalysis
Biocompatibility
Cite
Citations (0)
<p>A strategy to control the efficiency of a photocleavage reaction based on changing the nature of the excited state is presented. A novel class of photoactive compounds has been synthesized by combining the classical o-nitrobenzyl scaffold with an environmentally sensitive dye, 4-amino-nitrobenzothiazole. Irradiation in a polar solvent lead to an excited state that is inoperative for photochemistry whereas excitation in a nonpolar solvent lead to an excited state that is photochemically active. A photochemical degradation appears to be the preferred process in contrast to the intended photocleavage process.</p>
Degradation
Cite
Citations (1)
Abstract Indoles react smoothly with carbonyl compounds in 1‐butyl‐3‐methylimidazolium tetrafluoroborate ([bmim]BF 4 ) or 1‐butyl‐3‐methylimidazolium hexafluorophosphate ([bmim]PF 6 ) ionic liquids under mild reaction conditions to afford the corresponding bis‐indolylmethanes in excellent yields. These ionic liquids can be recovered and recycled in subsequent reactions without any apparent loss of activity.
Hexafluorophosphate
Tetrafluoroborate
Environmentally Friendly
Cite
Citations (124)
Ionic liquids 1-butyl-3-methylimidazolium tetrafluoroborate [bmIm][BF4] and 1-butyl-3-methylimidazolium hexafluorophosphate [bmIm][PF6] were evaluated as reaction media for allylic and benzylic oxidation reactions using manganese dioxide. The use of ionic liquids as an extractant in the reaction work-up was also investigated. Procedures for recycling of the [bmIm][PF6] ionic liquids used in these MnO2 oxidation reactions were also developed.
Hexafluorophosphate
Tetrafluoroborate
Biocatalysis
Cite
Citations (25)
Room temperature ionic liquid 1-butyl-3-methylimidazolium dibutylphosphate was synthesized under microwave irradiation.Ionic liquid 1-butyl-3-methylimidazolium dibutylphosphate was used as solvent for the selective α-monohalogenation of β-keto esters and cyclic ketones.The α-monohalogenation reactions were promoted with excellent yields,and they were environment friendly compared with those using traditional organic solvents.
Cite
Citations (0)
In this paper,a series of imidazolium ionic liquids with different anions and cations were prepared and the performance of these reaction medium for the synthesis of β-enaminones was investigated.The results showed that anion and cation had obvious effect on the performance of the ionic liquids.When anion was BF4-,the activity order of ionic liquids with different cations was [Hmim]+ [bmim]+,[emim]+ [bmmim]+.Among these reaction medium,[Hmim]BF4 exhibited the highest activity and had a yield of 96% after 10 min reaction.When cation was[Hmim]+,ionic liquids with a anion of BF4-,Tsa-,Br-and NO3-exhibited high activity and had a yield higher than 93% after 15 min reaction,while ionic liquid with HSO4-had a yield of 60% after 30 min.When cation was[bmim]+,the activity order was[bmim]Br [bmim]PF6 [bmim]BF4 and these three solvent/catalysts had a yield over 85%,while [bmim]HSO4 and [bmim]H2 PO4 ionic liquids presented a bad performance and had a yield below 70%.The [Hmim]BF4 was reused five times without considerable loss of activity and had a yield of 89% after 10 min.
Cite
Citations (0)