Infrared ATR Measurements at Low Temperatures. An Apparatus and the Absorption Intensities of Crystalline Benzene and Carbon Disulfide

Yamada, Haruka; Saheki, Masao

doi:10.1246/bcsj.56.35

Cited by 7 publications

(3 citation statements)

References 19 publications

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“…This is caused by the C–H···π interaction between benzene molecules. Hence, the band of the C–H out-of-plane bending shifts to a high frequency, when the benzene hydrogen interacts with the neighbor molecules. , Thus, benzene molecules in the C 12 mim + TFSA – –C 6 H 6 solutions might interact with both IL and benzene themselves. Actually, the previous X-ray diffraction investigation on C 2 mim + TFSA – –C 6 H 6 1:1 inclusion crystal has shown the existence of hydrogen-bond-like interactions between the benzene hydrogen and the TFSA – oxygen atoms .…”

Section: Resultsmentioning

confidence: 99%

Clusters of Imidazolium-Based Ionic Liquid in Benzene Solutions

2011

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Cluster formation of 1-dodecyl-3-methylimidazolium bis(trifluoromethanesulfonyl)amide (C(12)mim(+)TFSA(-)) in benzene solutions was investigated using small-angle neutron scattering (SANS), NMR, attenuated total reflectance infrared (ATR-IR), and large-angle X-ray scattering (LAXS) techniques. The SANS measurements revealed that C(12)mim(+)TFSA(-) is heterogeneously mixed with benzene in the narrow range of benzene mole fraction 0.9 ≤ x(C6D6) ≤ 0.995 with a maximum heterogeneity at x(C6D6) ≈ 0.99. The NMR results suggested that the imidazolium ring is sandwiched between benzene molecules through the cation-π interaction. Moreover, TFSA(-) probably interacts with the imidazolium ring even in the range of x(C6H6) ≥ 0.9. Thus, the imidazolium rings, benzene molecules, and TFSA(-) would form clusters in the C(12)mim(+)TFSA(-)-benzene solutions. The LAXS measurements showed that the distance between the imidazolium ring and benzene is ∼3.8 Å with that between the benzene molecules of ∼7.5 Å. On the basis of these results, we discussed a plausible reason for the liquid-liquid equilibrium of the C(12)mim(+)TFSA(-)-benzene system.

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Section: Resultsmentioning

confidence: 99%

Clusters of Imidazolium-Based Ionic Liquid in Benzene Solutions

2011

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“…The relative concentrations of water and the aromatics were also chosen to optimise interactions, with the values, determined via analysis of the vibrational bands, being 0.5-2 % for the PAHs [26,27,28] and ∼ 50 % for Bz. [29] An additional Bz:H 2 O sample of ∼ 3 % is included for completeness.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…Co-deposition of water and aromatic molecules maximizes the interactions between aromatics and the pASW surface, providing an optimal IR signal for studying the surface water modes. The relative concentrations of water and the aromatics were also chosen to optimize interactions, with the values, determined via analysis of the vibrational bands, being 0.5–2% for the PAHs − and ∼50% for Bz . An additional Bz:H 2 O sample of ∼3% is included for completeness.…”

Section: Experimental and Theoretical Methodsmentioning

confidence: 99%

Perturbation of the Surface of Amorphous Solid Water by the Adsorption of Polycyclic Aromatic Hydrocarbons

et al. 2019

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This joint theoretical and experimental study establishes that the adsorption of polycyclic aromatic hydrocarbons (PAHs) onto the amorphous ice surface provokes a broadening and redshift of the "dangling" OH (dOH) ice spectral feature, the redshift increasing with PAH size up to ∼ 85 cm −1 . It also reveals that, in certain interaction configurations, adsorption induces substantial reorganisation of the hydrogen-bonding network at the ice surface. Comparison with experiments validates the novel theoretical methodology relying on the density functional based tight binding approach, which offers a compromise between system size and accuracy enabling a wide sampling of surface structures. Applied in an astrophysical context, this study suggests that widening of the dOH feature by adsorption of aromatic molecules could explain its absence heretofore in observational ice spectra, offering hope that future missions with higher sensitivity will verify its presence or absence in dense regions.

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Removal of sulfuroxyanions by magnesium aluminium oxides and their thermal decomposition

Sato

Tezuka

Endo

et al. 1987

J of Chemical Tech & Biotech

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The behaviour of the removal of the sulfuroxyanions, S@,-, S,o2,-, S,@,and S,o2,-, in aqueous solutions by Mgo,6,A10.~6~o.,30 (0:vacancy) was investigated at 4 0 4 0 T . All the sulfuroxyanions were removed from solution competitively with OH-to form the hydrotalcite-like compounds. The rate of the removal was first order with respect to the concentration of the sulfuroxyanion in the solution, and the apparent activation energy was about 60 W mol-I. All the sulfuroxyanions intercalated in the interlayer of hydrotalcite structure decomposed to SO<-at I W 3 W C .

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Infrared ATR Measurements at Low Temperatures. An Apparatus and the Absorption Intensities of Crystalline Benzene and Carbon Disulfide

Cited by 7 publications

References 19 publications

Clusters of Imidazolium-Based Ionic Liquid in Benzene Solutions

Clusters of Imidazolium-Based Ionic Liquid in Benzene Solutions

Perturbation of the Surface of Amorphous Solid Water by the Adsorption of Polycyclic Aromatic Hydrocarbons

Removal of sulfuroxyanions by magnesium aluminium oxides and their thermal decomposition

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