Infrared spectra of cyclic ethers and their derivatives

Kilimov, A. P.; Svechnikova, M. A.; Шевченко, В. И.; Smirnov, V. V.; Zotov, S. B.; Kvasnyuk-Mudryi, F. V.

doi:10.1007/bf00943899

Cited by 5 publications

(4 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The spectra were recorded in a demountable KBr cell for liquid samples with spacer of path length of 0.5 mm at ambient temperature with a PerkinElmer Spectrum FT-IR spectrometer (RX-1). Pure DO shows characteristic bands at the range 1600-800 cm À1 due to vibrations of the ring (1122 cm À1 ), the wagging vibrations (800-1050 cm À1 ) and fan-like vibrations (1250-1300 cm À1 ) for CH 2 groups and scissor vibrations (1453 cm À1 ) [59]. DCE has characteristic peaks around 1232 cm À1 for trans conformer and two peaks around 1313 and 1285 cm À1 for gauche conformer [12].…”

Section: Ir Spectroscopic Studymentioning

confidence: 99%

Hydrogen bond interactions in the blends of 1,4-dioxane with some 1, 2- disubstituted ethanes at T=(298.15, 308.15 and 318.15) K

Pradhan¹,

Kamath

Brahman³

et al. 2015

Fluid Phase Equilibria

View full text Add to dashboard Cite

Section: Ir Spectroscopic Studymentioning

confidence: 99%

Hydrogen bond interactions in the blends of 1,4-dioxane with some 1, 2- disubstituted ethanes at T=(298.15, 308.15 and 318.15) K

Pradhan¹,

Kamath

Brahman³

et al. 2015

Fluid Phase Equilibria

View full text Add to dashboard Cite

“…Examining Figure , the time‐lapsed IR spectra of the evolved gases, shows the presence of an IR‐active species evolved from the CMS material. Focusing on the IR spectra at 57 min, Figure , shows the characteristic peaks of trace tetrahydrofuran (THF), the solvent used for the treatments …”

Section: Resultsmentioning

confidence: 99%

Tuning carbon molecular sieves for natural gas separations: A diamine molecular approach

Wenz

Koros

2016

AIChE Journal

View full text Add to dashboard Cite

This article introduces a new postsynthetic modification method for tuning the separation properties of carbon molecular sieve (CMS) membranes. Polymeric hollow fibers of 6FDA/BPDA‐DAM were pyrolyzed to 550°C under inert Argon, and were then exposed to a tetrahydrofuran solution containing PPM levels of paraphenylenediamine dopant. The original goal of the treatment was to modify the morphology in a manner to prevent relaxation of the CMS to suppress physical aging, envisioned to be analogous to that in glassy polymer membranes where reduction of “unrelaxed free volume” causes reduced permeance with a mild increase in selectivity. Results of long‐term CO2 and CH4 permeation experiments of doped fibers showed that aging‐resistant membranes did not result. This fact notwithstanding, results revealed this approach provides a valuable new tuning tool for CMS transport properties. Complementary gas sorption experiments performed suggest the amine dopants tune large ultramicropores, thereby increasing size and shape based diffusion selectivity. © 2016 American Institute of Chemical Engineers AIChE J, 63: 751–760, 2017

show abstract

“…[32,33] As expected, comparison of the symmetric C=O-stretching modes of the indium compounds 1, 2, and 3 shows a decrease in wavenumbers from sodium to cesium due to an increasing ionic character in this series of compounds. The bands in the range from 2975 to 2866 cm -1 belong to symmetric and asymmetric C-H stretching vibrations [34,35] and clearly show the dioxane solvate character of the compound.…”

Section: Ft-ir Spectroscopymentioning

confidence: 98%

Synthesis, Characterization, and Symmetry Relations of the Crystal Structures of Some Bis(dioxane) Adducts of Group 1 / Group 13 Heterometallic Trifluoroacetates

Czajkowski

Simon

Frank

2019

Zeitschrift anorg allge chemie

View full text Add to dashboard Cite

Four bis(dioxane) adducts of mixed‐metal trifluoroacetates, M[M′(O2CCF3)4(C4H8O2)2] (M = Na, K, Cs, M′ = In and M = Cs, M′ = Ga) were synthesized by reaction of alkali metal trifluoroacetate and group 13 element trifluoroacetate in 1,4‐dioxane and completely characterized including X‐ray structure determination. Geometric parameters, empirical bond valences and frequencies of the symmetric C=O stretching vibrations show that the moisture sensitive solids are composed of dimeric structural moieties with site symmetry 1, containing alkali metal ions and bis(dioxane)tetrakis(trifluoroacetato)indate or ‐gallate ions. The dimeric units are further connected by weaker “intermolecular” dioxane interactions to neighboring alkali metal ions. Closer inspection of space group symmetry, unit cell parameters and atom sites allows to rationalize the compounds as members of two isotypic pairs that are further closely related due to the group‐subgroup relation of their monoclinc space groups to a common orthorhombic supergroup.

show abstract

Infrared spectra of cyclic ethers and their derivatives

Cited by 5 publications

References 4 publications

Hydrogen bond interactions in the blends of 1,4-dioxane with some 1, 2- disubstituted ethanes at T=(298.15, 308.15 and 318.15) K

Hydrogen bond interactions in the blends of 1,4-dioxane with some 1, 2- disubstituted ethanes at T=(298.15, 308.15 and 318.15) K

Tuning carbon molecular sieves for natural gas separations: A diamine molecular approach

Synthesis, Characterization, and Symmetry Relations of the Crystal Structures of Some Bis(dioxane) Adducts of Group 1 / Group 13 Heterometallic Trifluoroacetates

Contact Info

Product

Resources

About