Measuring the solubility of benzoic acid in room temperature ionic liquids using chronoamperometric techniques

He, Weisi; Silvester, Debbie S.; Streeter, Ian; Aldous, Leigh; Hardacre, Christopher; Compton, Richard G.

doi:10.1002/poc.1428

Cited by 12 publications

(16 citation statements)

References 59 publications

(50 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In order to verify that the reduction feature (A) corresponded to the formation of superoxide and not peroxide, during the voltammetry of O 2 in [C 2 mim][NTf 2 ] on BDD, the solution was saturated with benzoic acid (75 ± 2 mM following the work of He et al [30]) and the scan rate study was repeated. Fig.…”

Section: Resultsmentioning

confidence: 99%

The electrochemical reduction of oxygen at boron-doped diamond and glassy carbon electrodes: A comparative study in a room-temperature ionic liquid

Ernst

Aldous

Compton

2011

Journal of Electroanalytical Chemistry

Self Cite

View full text Add to dashboard Cite

Section: Resultsmentioning

confidence: 99%

The electrochemical reduction of oxygen at boron-doped diamond and glassy carbon electrodes: A comparative study in a room-temperature ionic liquid

Ernst

Aldous

Compton

2011

Journal of Electroanalytical Chemistry

Self Cite

View full text Add to dashboard Cite

“…With the addition of water, the amount of free H + increases. Meanwhile, BF 4 hydrolyzes to generate more H + [43,44]. As a result, the amount of H 4 TPPS 2increases but that of H 2 TPPS 4is reduced.…”

Section: Fluorescence Of Tpps In Acidic Bmimbf 4 In the Presence Of Dmentioning

confidence: 99%

“…However, those of H 2 TPPS 4take the opposite trend. It is because the amount of free H + increases and BF 4 hydrolyzes to generate more H + with the addition of water [43,44]. Thus, certain amount of H 2 TPPS 4is protonated to generate H 4 TPPS 2-.…”

Section: Fluorescence Lifetimes Of Tpps In Acidic Bmimbf 4 In the Prementioning

confidence: 99%

“…Because of the unique physicochemical properties e.g. excellent thermodynamic stability, negligible vapor pressure [1] (environmentally benign media) [2], good solubility for various organic/ inorganic solutes [3,4], well designable properties by changing the cations and anions [5][6][7][8], and so on, they have been rapidly emerging as a new class of solvents in the fields of synthesis [9][10][11], catalysis [12], and separation [13]. Moreover, the imidazolium-based ILs have more extensive uses because they are particularly stable in water.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Investigation on the effect of water on the spectroscopic behaviors of TPPS in acidic imidazolium-based ionic liquids

Liu

Zhao

Jin

2012

J. Porphyrins Phthalocyanines

View full text Add to dashboard Cite

The effect of water on the spectroscopic behaviors of meso-tetrakis-(4-sulfonatophenyl) porphyrin (TPPS) in acidic 1-butyl-3-methylimidazolium tetrafluoroborate (BMIMBF 4 ) and 1-ethyl-3methylimidazolium tetrafluoroborate (EMIMBF 4 ) is investigated by spectroscopic methods. In acidic ionic liquids without water, the Soret bands of the protonated form (H 4 TPPS 2-) and J-aggregates of TPPS are centered at 449 and 469 nm, respectively, and the Q-band is centered at 679 nm. When increasing the content of water, the Soret band of H 4 TPPS 2is blue-shifted to 430 nm. However, the Soret and Q-bands of J-aggregates are red-shifted to 487 and 701 nm, respectively. The NMR and pyrene-scale polarity experiments reveal that the change of the bulk environment is responsible for the red-shift of J-aggregates and the blue-shift of H 4 TPPS 2-. According to the analysis of the fluorescence spectra, the content of H 4 TPPS 2increases gradually with the addition of water, while the content of H 2 TPPS 4takes the opposite trend. Simultaneously, the content of J-aggregates decreases substantially when the addition of water is 0 ~ ca. 12 mL (or 13 mL) but it decreases slowly with further addition of water. Remarkably, the fluorescence intensity of J-aggregates is relatively strong. In addition, the fluorescence of J-aggregates can be detected when λ ex is set at both λ ex for TPPS monomers and λ ex for J-aggregates. While the fluorescence of TPPS monomers can be detected only when λ ex is set at λ ex for monomers. Moreover, with the addition of water, the fluorescence lifetimes of H 2 TPPS 4and H 4 TPPS 2increase from 3.202 and 0.830 ns to 9.623 and 2.964 ns, respectively.

show abstract

“…He and al. [17] report a BAc solubility in room temperatuture ionic liquids based on imidazolium cation and [NTf 2 ] " = bis(trifluoromethylsulphonyl)imide, [BF 4 ] " = tetrafluoroborate, [PF 6 ] " = hexafluorophosphate and [NO 3 ] " = nitrate anions, using chronoamperometric techniques. To the best of our knowledge, in literature did not find results on the BAc solubility in ionic liquids based on imidazolium cation and formate anion.…”

mentioning

confidence: 99%

Study of Benzoic Acid Solubility in Imidazolium Formate as Pure Ionic Liquid and Its Binary Aqueous Mixtures

Stefan¹,

Chiriac²,

Dragostin³

et al. 2017

Rev. Chim.

View full text Add to dashboard Cite

The determination of benzoic acid (BAc) solubility in pure imidazolium formate (ImForm) and their aqueous mixtures of [ImForm/water], was performed by the acid-base titration of the saturated solutions. [ImForm/water] solutions were tested using an ImForm concentration ranging from 1.66-4.33 g/L. The BAc solubility in pure ionic liquid was compared with that of some common organic solvents reported in literature, such as: ethanol, chloroform, cyclohexane. The highest solubility of BAc was for pure ImForm (from 1073 g/L at 293 K up to 2200 g/L at 323 K), the determined values being superior to BAc solubility in organic solvents mentioned. The results confirm that the polar solvents, such as ImForm and ethanol, present the highest BAc solubility values. At 293 K, the mole fraction of BAc in pure ImForm was 2.8 times higher than the mole fraction of BAc in ethanol. The BAc solubility in binary mixtures [ImForm/water] was compared with that determined in [NaCl/water] mixtures. At the same salt concentration, ranging from 1.66 to 4.33 g/L, at a constant working temperature (323 K), the increasing concentration of NaCl lowers the solubility of BAc. In opposite, the increasing of ImForm concentration determines a considerable increase in BAc solubility into the [ImForm/water] mixture. At 277 K, for 1.66 g/L salt concentration in water, the BAc solubility in [salt/water] solvents shows very similar values (~1.3 g/L) for both [ImForm/water] and [NaCl/water]. If the temperature increases to 323 K, the BAc solubility in [ImForm/water] mixture is about 1.5 times higher than that of solubility in distillated water and 2.5 times higher compared to that in [NaCl/water]. It was concluded that the benzoic acid presents a great solubility in pure ImForm and in its [ImForm/water] aqueous mixture.

show abstract

Measuring the solubility of benzoic acid in room temperature ionic liquids using chronoamperometric techniques

Cited by 12 publications

References 59 publications

The electrochemical reduction of oxygen at boron-doped diamond and glassy carbon electrodes: A comparative study in a room-temperature ionic liquid

The electrochemical reduction of oxygen at boron-doped diamond and glassy carbon electrodes: A comparative study in a room-temperature ionic liquid

Investigation on the effect of water on the spectroscopic behaviors of TPPS in acidic imidazolium-based ionic liquids

Study of Benzoic Acid Solubility in Imidazolium Formate as Pure Ionic Liquid and Its Binary Aqueous Mixtures

Contact Info

Product

Resources

About