Selective fluorescence quenching of polycyclic aromatic hydrocarbons by nitromethane within room temperature ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate

Fletcher, Kristin A.; Pandey, Shubha; Storey, Isaiah K; Hendricks, Ashley E.; Pandey, Siddharth

doi:10.1016/s0003-2670(01)01488-x

Cited by 59 publications

(46 citation statements)

References 39 publications

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“…The previous results demonstrate that RTILs, such as [C 4 MIM]PF 6 , have a different effect on strongly versus weakly fluorescing compounds, namely an enhancing effect for strongly fluorescing chemicals (e.g., DNSCl, rhodamine B, 1,10-phenanthroline, NFLX), and a quenching effect for weakly fluorescing chemicals (e.g., 17α-estradiol (EE1), 17β-estradiol (E2) and BPA). The former phenomenon is in agreement with observations by Fletcher et al [23] who found the emission from alternant PAHs was quenched while that from nonalternant PAHs was not [4]. However, further research is required to understand the exact mechanism responsible for these differences.…”

Section: The Different Effects Of Rtils On Chemicals With Different Fsupporting

confidence: 92%

“…Effects of the Different RTIL Concentrations on Fluorescence Behavior of BPA At ambient conditions, the viscosity of most ionic liquids is in the range of 10~1,000 mPa.s, which is much more viscous than organic solvents, such as methanol and acetonitrile [23]. 4 was reported to be 430 and 154 mPa.s, respectively, as compared to methanol with a viscosity of 0.58 mPa.s [24].…”

Section: Effects Of the Viscosities On Fluorescence Behavior Of Bpamentioning

confidence: 99%

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Fluorescence Characteristics of Bisphenol A in Room Temperature Ionic Liquids

Wang

Zou

et al. 2013

J Fluoresc

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Section: The Different Effects Of Rtils On Chemicals With Different Fsupporting

confidence: 92%

Section: Effects Of the Viscosities On Fluorescence Behavior Of Bpamentioning

confidence: 99%

Fluorescence Characteristics of Bisphenol A in Room Temperature Ionic Liquids

Wang

Zou

et al. 2013

J Fluoresc

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“…Many molecules are being tested for selective quenching of PAHs. An electron acceptor like nitromethane, [60] cetylpyridinium chloride, [66][67][68][69][70] dodecylpyridinium chloride, [71] pyridinium chloride, [72] carbon tetrachloride [73] etc. quenches selectively alternant PAHs rather than nonalternant ones and electron donor like 1,2,4-trimethoxybenzene, [74] aliphatic amines [75,76] etc.…”

Section: Selective Fluorescence Quenching Studymentioning

confidence: 99%

Applications and New Developments in Fluorescence Spectroscopic Techniques for the Analysis of Polycyclic Aromatic Hydrocarbons

Patra¹

2003

Appl Sp Rev

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“…These properties make RTILs wide applications as media of material synthesis [3], electrochemical study [4], separation [5] and chemical reaction [6]. In analytical fields, RTILs were used as stationary phase in gas chromatography [7], and as mobile phase additives in capillary electrophoresis and fluorescence analysis [8, 9]. Zou and coworkers found that part of RTILs can sensitize fluorescence of norfloxacin significantly, which was used to develop sensitive spectrometric method for determination of norfloxacin at trace levels [10].…”

Section: Introductionmentioning

confidence: 99%

Fluorescence Quenching of 4-tert-Octylphenol by Room Temperature Ionic Liquids and its Application

et al. 2012

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The interactions between room temperature ionic liquids (RTILs) and weak fluorescent chemicals still remain unclear, which hinders the complete and efficient utilization of these “green” solvents in fluorescent analyses of organic chemicals. Herein, we reported the effects of four RTILs, [C8MIM]BF4, [C14MIM]BF4, [C8MIM]PF6 and [C14MIM]PF6, on fluorescence behavior of 4-tert-octylphenol (4-t-OP). In the fortified concentration range of 0.2–1.0 mM, the quenching effects were increased with increasing concentrations of RTILs. However, no obvious variation of peak shape of 4-t-OP was observed in the quenching process, suggesting no formation of ground-state complex between fluorophores in 4-t-OP and quencher (ionic liquids). As for anion effect, the fluorescence quenching efficiency of 4-t-OP by BF4- was greater than PF6-, but the carbon chain length on the imidazolium ring had no significant relationship with fluorescence intensity of 4-t-OP. Both Ksv values (>1.0 × 103 L/mol.s) and the different temperature effects demonstrated that the quenching of 4-t-OP by four RTILs was the presence of dynamic and static quenching mechanism. The FI of dansyl chloride within [C8MIM]BF4 increased nearly 5-fold as compared to the control, showing a sensitizing effect on the strong fluorescent chemicals, while a quenching effect on 4-t-OP belonging to weak fluorescent chemicals. The fluorescence-enhanced amplitude of dansyl chloride in [C8MIM]PF6 was greater than [C8MIM]BF4. The fluorescence quenching of 4-t-OP by [C8MIM]PF6 did not belong to FRET phenomenon because of no overlap of emission spectrum of 4-t-OP and absorption spectrum of [C8MIM]PF6. When 0.6 mM [C8MIM]PF6 in acetonitrile was used as the solvent, the detection limit of 4-t-OP was 3.7 μg/L, and the linearity range was 0.01–0.8 mg/L (R2 = 0.9990). In summary, these results provide a theoretical foundation for the application of RTILs in weak fluorescent chemicals.

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Selective fluorescence quenching of polycyclic aromatic hydrocarbons by nitromethane within room temperature ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate

Cited by 59 publications

References 39 publications

Fluorescence Characteristics of Bisphenol A in Room Temperature Ionic Liquids

Fluorescence Characteristics of Bisphenol A in Room Temperature Ionic Liquids

Applications and New Developments in Fluorescence Spectroscopic Techniques for the Analysis of Polycyclic Aromatic Hydrocarbons

Fluorescence Quenching of 4-tert-Octylphenol by Room Temperature Ionic Liquids and its Application

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