scholarly journals Helium droplet infrared spectroscopy of glycine and glycine–water aggregates

2016 ◽  
Vol 18 (40) ◽  
pp. 28082-28090 ◽  
Author(s):  
Matin Kaufmann ◽  
Daniel Leicht ◽  
Raffael Schwan ◽  
Devendra Mani ◽  
Gerhard Schwaab ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Absorption Spectra ◽  
Infrared Absorption ◽  
Superfluid Helium ◽  
Frequency Range ◽  
Helium Nanodroplets ◽  
Helium Droplet ◽  
Infrared Absorption Spectra

Infrared absorption spectra of glycine and glycine–water aggregates embedded in superfluid helium nanodroplets were recorded in the frequency range 1000–1450 cm−1.

A Study of Na2O-TiO2-SiO2 Glasses by Infrared Spectroscopy

1974 ◽  
Vol 28 (3) ◽  
pp. 256-259 ◽  
Author(s):  
Murli H. Manghnani ◽  
John R. Ferraro ◽  
L. J. Basile
Keyword(s):  
Infrared Spectroscopy ◽  
Absorption Band ◽  
Infrared Absorption ◽  
Vibrational Frequency ◽  
Silicate Glasses ◽  
Molar Ratio ◽  
Frequency Range ◽  
Weak Absorption ◽  
Infrared Absorption Spectra ◽  
The Relationship

The infrared absorption spectra of six Na2O-TiO2-SiO2 glasses in the frequency range of 1600 to 200 cm−1 are reported. These glasses, having a SiO2/Na2O molar ratio of 1.07 to 3.54, and containing 20 or 25 mole % TiO2, demonstrate two main absorptions at ∼950 cm−1 and at ∼450 cm−1. A weak absorption at ∼790 cm−1 becomes progressively weaker in intensity, and a weak shoulder at 1050 cm−1 appears with increasing Na2O content. The frequency of the absorption band at ∼950 cm−1 is found to decrease markedly and systematically with a decrease in the SiO2/Na2O molar ratio, whereas the frequency of the band at ∼450cm−1 shows a slight increase. The infrared results may be interpreted in terms of a lowering of symmetry occurring for the SiO4 units. The effect of TiO2 content on the relationship between vibrational frequency is discussed. The frequency composition curves for glasses containing 20 and 25 mole % of TiO2 intersect at SiO2/Na2O ratio ∼2. A reversal in the frequency vs SiO2/Na2O ratio relation was also found at SiO2/Na2O ∼2 for the sodium silicate glasses.

A Liquid Crystal as a Solvent in Infrared Spectroscopy

1969 ◽  
Vol 24 (5) ◽  
pp. 866-867 ◽  
Author(s):  
Torben Stroyer Hansen
Keyword(s):  
Magnetic Field ◽  
Infrared Spectroscopy ◽  
Liquid Crystal ◽  
Strong Magnetic Field ◽  
Absorption Spectra ◽  
Infrared Absorption ◽  
Maximum Degree ◽  
Degree Of Orientation ◽  
Infrared Absorption Spectra

Abstract A technique to obtain infrared absorption spectra of orientated molecules, dissolved in a liquid crystal, which is placed in a strong magnetic field, is described. The degree of orienta­tion of 4,4'-dihexoxyazoxybenzene is measured at various temperatures. The maximum degree of orientation of 4-bromo-benzonitrile and 4-cyanobenzoic acid is measured in a 10% solution in 4,4'-dihexoxyazoxybenzene to be 0.35 and 0.55, respectively.

scholarly journals The Use of FTIR Spectroscopy in Forensic Practice and Its Potential Future Applications

2017 ◽  
Vol 12 (1) ◽  
pp. 85-91
Author(s):  
I. N. Barannikova
Keyword(s):  
Infrared Spectroscopy ◽  
Quantitative Analysis ◽  
Ftir Spectroscopy ◽  
Absorption Spectra ◽  
Infrared Absorption ◽  
Near Infrared ◽  
Science And Technology ◽  
Analytical Technique ◽  
Forensic Practice ◽  
Infrared Absorption Spectra

The author examines current applications of infrared spectroscopy in forensic practice and in various areas of science and technology. The paper includes an overview of objects that warrant the use of this forensic analytical technique. It is pointed out that not all capabilities of the method are currently put to use by forensic practitioners. It is also noted that methods based on infrared spectroscopy can be used for quantitative analysis, as well as the study of far and near infrared absorption spectra for forensic purposes.

Clinical Applications of Infrared Spectroscopy

1960 ◽  
Vol 6 (5) ◽  
pp. 453-465 ◽  
Author(s):  
Bernard Klein ◽  
Milton Weissman ◽  
Judith Berkowitz
Keyword(s):  
Salivary Gland ◽  
Infrared Spectroscopy ◽  
Solid State ◽  
Absorption Spectra ◽  
Biliary Tract ◽  
Infrared Absorption ◽  
Potassium Bromide ◽  
Clinical Applications ◽  
Infrared Absorption Spectra ◽  
Salivary Gland Calculi

Abstract The infrared absorption spectra of typical prostatic, dental, and salivary gland calculi are presented. Similarly, the spectrum given by typical biliary tract calculi is demonstrated. Examples of the extension of this method of identification to common toxicologic problems are shown. The advantages of the potassium-bromide presseddisk preparation for analyses of these substances in the solid state are indicated and discussed.

Far infrared absorption spectra in liquid and solid H2

1982 ◽  
Vol 60 (10) ◽  
pp. 1422-1428 ◽  
Author(s):  
U. Buontempo ◽  
S. Cunsolo ◽  
P. Dore ◽  
L. Nencini
Keyword(s):  
Absorption Spectra ◽  
Infrared Absorption ◽  
Solid Phase ◽  
Far Infrared ◽  
Frequency Range ◽  
Remarkable Similarity ◽  
Liquid Phases ◽  
Infrared Absorption Spectra

The far infrared absorption spectra of hydrogen have been measured in solid and liquid phases in the frequency range 300–800 cm−1. We have found a remarkable similarity between the liquid and solid spectra. In the solid phase, we have performed measurements at different ortho-H2 concentrations, in order to investigate the influence of ortho-H2 molecules. In particular, we have studied the behaviour of the S(0) line at low ortho-H2 concentrations. We found that the rotational exciton picture describes our results well.

scholarly journals Identification of succinite of infrared absorption spectra

2020 ◽  
Vol 164 ◽  
pp. 14001
Author(s):  
Iana Verkhovskaia ◽  
Viktor Prokopenko ◽  
Evgeni Vasiliev
Keyword(s):  
Infrared Spectroscopy ◽  
Absorption Spectra ◽  
Infrared Spectra ◽  
Infrared Absorption ◽  
Science Research ◽  
Material Science Research ◽  
The Russian Federation ◽  
Infrared Absorption Spectra ◽  
Characteristic Features ◽  
The City

The solution of the problem of identification of amber (succinite) on the example of natural polymer material of organic origin on the basis of its infrared absorption spectra is proposed. Taking into account the growing demand for the use of such composite materials on an industrial scale and the insufficiency of existing methods for determining their composition, the proposed method can become a new solution to the problem of identification. The basis of the proposed method for the study of succinite using infrared spectroscopy is translucent spectroscopy, with the measurement of mirror and diffuse reflection. The samples amber of the Palmniken Deposit obtained in the city of Kaliningrad of the Russian Federation were used as the objects studied. The data of infrared spectra of succinite obtained by the proposed method of infrared spectroscopy are obtained and presented in comparison. Five main links on the obtained infrared spectra have been experimentally determined, which can be used as characteristic features for identification and diagnostics of succinite by the material composition. The proposed method may be of interest in the theory of knowledge of material science, research related to the processes of identification, processing of production of amber.

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