scholarly journals Solid-state infrared absorption spectra and chain arrangement in some synthetic homooligopeptides in the intermolecularly hydrogen-bonded pleated-sheet β-conformation

Biopolymers ◽  
1977 ◽  
Vol 16 (1) ◽  
pp. 219-224 ◽  
Author(s):  
Claudio Toniolo ◽  
Manlio Palumbo
Keyword(s):  
Solid State ◽  
Absorption Spectra ◽  
Infrared Absorption ◽  
Infrared Absorption Spectra ◽  
Pleated Sheet ◽  
Hydrogen Bonded

Infrared Absorption Spectra of Some Hydroxy Compounds in the 3 Micron Region

1961 ◽  
Vol 14 (2) ◽  
pp. 211 ◽  
Author(s):  
JS Cook ◽  
IH Reece
Keyword(s):  
Hydrogen Bonding ◽  
Solid State ◽  
Carbon Tetrachloride ◽  
Absorption Spectra ◽  
Infrared Absorption ◽  
Butyl Phenol ◽  
Infrared Absorption Spectra ◽  
Sterically Hindered ◽  
Hydroxy Compounds

Infrared absorption spectra are reported in the region 2.6 to 3.8 microns for the solid state and for solutions in carbon tetrachloride of 10 sterically hindered hydroxy compounds. Absorption types vary from that of 2,4,6-tri-t-butyl phenol, where the OH group is completely " free " in both states, to that of 3,5-diaceto-p-cresol where the bands are diffuse and are centred about 3.4 microns corresponding to very strong hydrogen bonding. Deuteration studies suggest that splitting of the free OH band in several cases may arise from azimuthal orientations of the OH group and for tri-cyclohexyl carbinol -ΔH for this equilibrium has been estimated at 1 kcal/g-mole.

Etude expérimentale et théorique des spectres de vibration des dérivés di- et trisubstitués de l'isothiazole

1977 ◽  
Vol 55 (12) ◽  
pp. 2302-2309 ◽  
Author(s):  
Gilbert Mille ◽  
Michel Guiliano ◽  
Jacques Chouteau
Keyword(s):  
Solid State ◽  
Absorption Spectra ◽  
Raman Spectra ◽  
Infrared Absorption ◽  
Liquid Solution ◽  
Etude Expérimentale ◽  
Normal Vibrations ◽  
Modes Of Vibration ◽  
Infrared Absorption Spectra ◽  
Étude Expérimentale

The infrared absorption spectra in different physical states (liquid, solution, vapor) and the Raman spectra in the liquid or solid state of di- and trisubstituted isothiazole derivatives have been analyzed. For some compounds a study of the normal vibrations has also been done. An assignment of the fundamental modes of vibration of these molecules is given and discussed.

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.

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