scholarly journals Infrared Spectra of Acyclic Imides. II. The Characteristic Absorption Bands of Saturated Acyclic Imides in the Crystalline State

1961 ◽  
Vol 34 (4) ◽  
pp. 551-556 ◽  
Author(s):  
Toyozo Uno ◽  
Katsunosuke Machida
Keyword(s):  
Infrared Spectra ◽  
Crystalline State ◽  
Absorption Bands ◽  
Characteristic Absorption

Anomalies in the Infrared Spectra of Mixed Carbonate Precipitates

1968 ◽  
Vol 22 (5) ◽  
pp. 497-501 ◽  
Author(s):  
Gene E. Kalbus ◽  
Eugene A. Berg ◽  
Lee H. Kalbus
Keyword(s):  
Infrared Spectra ◽  
Anomalous Behavior ◽  
Absorption Bands ◽  
Characteristic Absorption ◽  
Quantitative Measurements ◽  
Mixed Carbonate

When a mixture of cations in solution is precipitated by the addition of carbonate, the resulting mixed carbonate precipitate, when subjected to infrared examination, does not usually exhibit the individually characteristic absorption bands due to each of the carbonates constituting the mixture. Instead, various interesting anomalies such as blending of bands, shifting of positions, and changing of intensities are observed. Such anomalous behavior may hamper any qualitative or quantitative measurements on such samples. Representative spectra and possible explanations for some of these anomalies are presented.

The Infrared Spectra of Some 1-(2-Thienyl)-3- and -4-Thiaalkanes

1979 ◽  
Vol 33 (6) ◽  
pp. 578-581
Author(s):  
Norman G. Foster ◽  
Bernice B. Bonner ◽  
Robert W. Higgins
Keyword(s):  
Absorption Band ◽  
Infrared Spectra ◽  
Thiophene Ring ◽  
Absorption Bands ◽  
Characteristic Absorption ◽  
Molecular Weights ◽  
Ring Compounds ◽  
Major Absorption Band

The infrared spectra of six 1-(2-thienyl)-3-thiaalkanes and seven 1-(2-thienyl)-4-thiaalkanes (molecular weights from 186 to 270) were obtained for the 4000 to 400 cm−1 range. These spectra are compared with spectra of other thiophene ring compounds substituted in the 2-position for their characteristic absorption bands. The spectra agree with other spectra as to the major absorption band around 680 cm−1 and the 2-substitution overtone pattern. A method of distinguishing between the two groups of compounds from moderate peaks in the 600 to 500 cm−1 (KBr) region is shown. Interference from the 2-alkylthiophenes and the 1-(2-thienyl)-1-thiaalkanes does not occur.

Infrared Spectra of Some α,ω-Dinitroxy Alkanes

1966 ◽  
Vol 20 (6) ◽  
pp. 380-383 ◽  
Author(s):  
R. D. Barefoot ◽  
A. R. Lawrence
Keyword(s):  
Infrared Spectra ◽  
Absorption Bands ◽  
Frequency Shifts ◽  
Characteristic Absorption

The infrared spectra of eight α, ω-dinitroxy alkanes are examined, and frequency shifts and related intensities of characteristic absorption bands are discussed.

An Infrared Study of Metal Isopropoxide Precursors for SrTiO3

1984 ◽  
Vol 32 ◽  
Author(s):  
R. E. Riman ◽  
D. M. Haaland ◽  
C.J.M. Northrup ◽  
H. K. Bowen ◽  
A. Bleier
Keyword(s):  
Ir Spectra ◽  
Detailed Analysis ◽  
Infrared Spectra ◽  
Spectral Features ◽  
Absorption Bands ◽  
Infrared Study ◽  
Characteristic Absorption ◽  
Local Environments ◽  
Insight Into ◽  
Hydrolysis Reactions

ABSTRACTA Sr/Ti bimetallic isopropoxide complex was synthesized by two methods. The complex served as a precursor to the production of homogeneous SrTiO3 powders via alkoxide hydrolysis. Infrared spectra were obtained for Sr(OPri)2, Ti(OPri)4, and the product of the syntheses. In addition, the IR spectra of the solutions of each of the alkoxides were followed as hydrolysis reactions proceeded. Detailed analysis of the spectral features support the existence of a 1:1 Sr/Ti bimetallic alkoxide. The new Sr/Ti compound exhibits characteristic absorption bands at (1017, 993, 972, 961 cm−1), (844, 838, 827 cm−1) and (620, 596, and 572 −1). A band at 819−1 might also be associated with the new Sr/Ti bimetallic alkoxide. The infrared spectra suggest that the isopropoxide ligands in the bimetallic alkoxide are in at least three separate local environments. This information offers insight into possible structures for the complex.

Pyrrole Studies. I. The Infrared Spectra of 2-Monosubstituted Pyrroles

1963 ◽  
Vol 16 (1) ◽  
pp. 93 ◽  
Author(s):  
RA Jones
Keyword(s):  
Infrared Spectra ◽  
Infrared Absorption ◽  
Absorption Bands ◽  
Infrared Absorption Bands

The positions and intensities of the characteristic infrared absorption bands of the nucleus are recorded and discussed for thirty-five 2-monosubstituted pyrroles.

scholarly journals A surface confined yttrium(iii) bis-phthalocyaninato complex: a colourful switch controlled by electrons

2016 ◽  
Vol 7 (8) ◽  
pp. 4940-4944 ◽  
Author(s):  
I. Alcón ◽  
M. Gonidec ◽  
M. R. Ajayakumar ◽  
M. Mas-Torrent ◽  
J. Veciana
Keyword(s):  
Optical Properties ◽  
Absorption Bands ◽  
Electrical And Optical Properties ◽  
Redox States ◽  
Characteristic Absorption ◽  
Double Decker ◽  
Visible Spectra

SAMs of a Y(iii) double-decker complex on ITO have been prepared and their electrical and optical properties explored, exhibiting three accessible stable redox states with characteristic absorption bands in the visible spectra, corresponding to three complementary colors (i.e., green, blue and red).

scholarly journals Оптические свойства фазопеременных материалов системы германий--сурьма-теллур составов Ge-=SUB=-14-=/SUB=-Sb-=SUB=-29-=/SUB=-Te-=SUB=-57-=/SUB=- и Ge-=SUB=-15-=/SUB=-Sb-=SUB=-15-=/SUB=-Te-=SUB=-70-=/SUB=- в дальнем инфракрасном диапазоне

2021 ◽  
Vol 55 (7) ◽  
pp. 542
Author(s):  
В.А. Рыжов ◽  
Б.Т. Мелех ◽  
Л.П. Казакова
Keyword(s):  
Amorphous Alloy ◽  
Infrared Absorption ◽  
Crystalline State ◽  
Room Temperature ◽  
Torsional Vibrations ◽  
Phonon Modes ◽  
Absorption Bands ◽  
Structural Units ◽  
Chalcogenide Alloys ◽  
Infrared Absorption Spectra

Abstract Infrared absorption spectra of chalcogenide alloys of the GST system with the compositions Ge14Sb29Te57 and Ge15Sb15Te70 in the amorphous and crystalline state were measured and analyzed in the range of 20 – 400 cm– 1 (0.6 – 12 THz) at room temperature. Absorption at these frequencies is due to the manifestation of correlated torsional vibrations of structural units of the amorphous alloy and phonon modes of the crystal. The performed assignment of absorption bands and the revealed differences in the IR spectra make it possible to more confidently represent the possible molecular mechanism of reversible amorphous-crystalline transformations in the studied phase-changing materials

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