scholarly journals Lines of Large Frequency Shift in the Raman Spectra of Crystals

Nature ◽  
1931 ◽  
Vol 128 (3229) ◽  
pp. 495-495 ◽  
Author(s):  
R. TOMASCHEK
Keyword(s):  
Frequency Shift ◽  
Raman Spectra ◽  
Large Frequency

Raman spectra of tetragonal zirconia: powder to zircaloy oxide frequency shift

2001 ◽  
Vol 288 (2-3) ◽  
pp. 241-247 ◽  
Author(s):  
Pierre Barbéris ◽  
Gaëlle Corolleur-Thomas ◽  
René Guinebretière ◽  
Thérèse Merle-Mejean ◽  
Andrei Mirgorodsky ◽  
...  
Keyword(s):  
Frequency Shift ◽  
Raman Spectra ◽  
Tetragonal Zirconia ◽  
Zirconia Powder

Darstellung und Schwingungsspektren von Alkyl-und Rhodanohydrohexaboraten / Preparation and Vibrational Spectra of Alkyl and Rhodano Hydrohexaborates

1988 ◽  
Vol 43 (10) ◽  
pp. 1327-1331 ◽  
Author(s):  
A Heinrich ◽  
W Preetz
Keyword(s):  
Frequency Shift ◽  
Raman Spectra ◽  
Organic Solvents ◽  
Vibrational Spectra ◽  
High Frequency ◽  
Acidity Constants ◽  
High Frequency Shift ◽  
Basic Solutions ◽  
Stretching Vibrations ◽  
Ir And Raman

Treatment of B6H62- with iodoalkanes and (SCN)2 in organic solvents affords the monosubstituted protonated hexaborates RB6H6-, R = CH3, C2H5< C3H7, C4H9, C8H17 and SCN, respectively. The acidity constants of these weak Brönsted acids range for the alkylated species from 8.8 to 9.6, and for R = SCN the pka value is ~5. From basic solutions the salts Cs2RB6H5 can be precipitated, which show band patterns in the IR and Raman spectra typical for monosubstituted hydrohexaborates. The protonated compounds RB6H6- are distinguished from the corresponding Brönsted bases RB6H52- by a high frequency shift of the BH stretching vibrations in the order of 100 cm-1. For Cs2(SCN)B6H5, S coordination of SCN- is supposed because of the high frequency of νCN: 2144 cm-1.

Large-frequency-shift tunable parametric oscillation in a Kerr microresonator

2020 ◽  
Author(s):  
Noel Lito B. Sayson ◽  
Toby Bi ◽  
Vincent Ng ◽  
Hoan Pham ◽  
Luke S. Trainor ◽  
...  
Keyword(s):  
Frequency Shift ◽  
Parametric Oscillation ◽  
Large Frequency

Potassium and ammonium hydrogen phthalates KHC6H4(COO)2and (NH4)HC6H4(COO)2- new organic crystals for Raman laser converters with large frequency shift

2009 ◽  
Vol 6 (7) ◽  
pp. 544-551 ◽  
Author(s):  
A.A. Kaminskii ◽  
S.N. Bagayev ◽  
V.V. Dolbinina ◽  
E.A. Voloshin ◽  
H. Rhee ◽  
...  
Keyword(s):  
Frequency Shift ◽  
Raman Laser ◽  
Organic Crystals ◽  
Ammonium Hydrogen ◽  
Large Frequency

The effects of solvents on the stretching vibrations of the thiocyanate and isothiocyanate groups

1964 ◽  
Vol 17 (8) ◽  
pp. 838 ◽  
Author(s):  
RA Cummins
Keyword(s):  
Hydrogen Bond ◽  
Frequency Shift ◽  
Mixed Solvent ◽  
Intensity Change ◽  
Solute Interaction ◽  
Stretching Vibration ◽  
Stretching Vibrations ◽  
Large Frequency ◽  
Phenyl Compounds

The frequency and intensity of the pseudo-antisymmetric -NCS stretching vibration and the -C≡N stretching vibration in -SCN have been measured for the methyl and phenyl compounds of both isomers in a range of solvents. It is shown that the intensity change in the thiocyanates follows a function of the Buckingham type, but that the change in the intensity of the isothiocyanates is complicated by a further effect which could be due to specific solvent/solute interaction. This interaction is reflected in the large frequency shift of the isothiocyanates whereas for the thiocyanates the shift is only very small. However, mixed-solvent studies indicate that the interaction is not strong enough to be classed as a hydrogen bond. Parallel solvent studies on the analogous vibration of the -NCO group indicate that this group, rather surprisingly, is barely solvent-sensitive at all.

Raman Scattering Spectroscopy of GeSi/Si Strained Layer Superlattice

1993 ◽  
Vol 298 ◽  
Author(s):  
Zhang Rong ◽  
Zheng Youdou ◽  
Gu Shulin ◽  
Hu Liqun
Keyword(s):  
Raman Scattering ◽  
Frequency Shift ◽  
Raman Spectra ◽  
Strain Distribution ◽  
Phonon Frequency ◽  
New Method ◽  
Raman Scattering Spectroscopy ◽  
Scattering Measurements ◽  
Optic Phonon ◽  
Strained Layer Superlattice

AbstractRaman scattering measurements have been carried out on Si1-xGex/Si SLS. It is found that the Ge–Ge optic phonon frequency shift is proportional to strain in the SiGe film, and the Ge–Ge strain shift coefficient is 408cm−1. Based on these study a new method for analyzing the Raman spectra of SiGe/Si SLS has been proposed. Using the new method we can obtain the composition of the alloy sublayers as well as the strain in SLS. The strain distribution in the SiGe/Si SLS has been discussed, and strain in both SiGe and Si sublayers of the SLS have been calculated.

scholarly journals Комбинационное рассеяние света в эвтектическом композите InSb-MnSb

2020 ◽  
Vol 54 (4) ◽  
pp. 341
Author(s):  
И.Х. Мамедов ◽  
Д.Г. Араслы ◽  
Р.Н. Рагимов ◽  
А.А. Халилова
Keyword(s):  
Thin Films ◽  
Frequency Shift ◽  
Raman Spectra ◽  
High Frequency ◽  
Theoretical Data ◽  
Eutectic Composite ◽  
Flash Evaporation ◽  
Evaporation Method ◽  
The Matrix ◽  
High Frequency Shift

Raman spectra of bulk samples of the InSb-MnSb eutectic composite and their thin films prepared by the flash evaporation method have been studied. In the Raman spectra observed TO and LO modes at frequencies of 179.5 cm-1 and 192.4 cm-1 correspond to InSb compound and also the peaks at frequencies 122 cm-1, 127 cm-1, 167 cm-1, 211 cm-1, 245.5 cm-1 correspond to theoretical data for MnSb as is well known from literature. The TO mode in the Raman spectra for films is shifted toward lower energies (178 cm-1), but the LO mode is higher (196 cm-1). The high-frequency shift of the LO mode in the composite with compared its value for InSb is probably due to the presence of deformation at the matrix-inclusion interface, as well as the contribution by surface phonons scattering.

Large frequency shift in Fe-based nanocrystalline powder cores

2004 ◽  
Vol 278 (1-2) ◽  
pp. 82-86 ◽  
Author(s):  
Z.J. Zhao ◽  
Y.Z. Fang ◽  
J.Z. Ruan ◽  
X.L. Yang
Keyword(s):  
Frequency Shift ◽  
Nanocrystalline Powder ◽  
Large Frequency
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