Results 241 to 250 of about 1,176,548 (296)
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Spectroscopy Letters, 1973
Abstract The spectroscopy of porphyrins has been developing rapidly during the last two decades, this class of compounds being of great biological importance and possessing a number of significant properties. Different spectroscopic techniques, viz., electronic spectroscopy including fine-structure quasiline spectra (Shpolsky effect), infrared ...
K. N. Solovyov +3 more
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Abstract The spectroscopy of porphyrins has been developing rapidly during the last two decades, this class of compounds being of great biological importance and possessing a number of significant properties. Different spectroscopic techniques, viz., electronic spectroscopy including fine-structure quasiline spectra (Shpolsky effect), infrared ...
K. N. Solovyov +3 more
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Biopolymers, 1969
AbstractThe laser‐excited Raman spectrum of helical polyglycine II has been obtained. Oligomers of polyglycine are in the planar zigzag conformation and their Raman spectra are indicative of the spectrum of polyglycine I. The Raman spectra of polyglycines have bands complementary to the infrared which are sensitive to the conformation of the chain. The
M. Smith, A. G. Walton, J. L. Koenig
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AbstractThe laser‐excited Raman spectrum of helical polyglycine II has been obtained. Oligomers of polyglycine are in the planar zigzag conformation and their Raman spectra are indicative of the spectrum of polyglycine I. The Raman spectra of polyglycines have bands complementary to the infrared which are sensitive to the conformation of the chain. The
M. Smith, A. G. Walton, J. L. Koenig
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Raman Spectra of NanophaseCr2O3
Journal of Raman Spectroscopy, 1996The Raman spectra of nanometer-sized Cr2O3 particles (annealed in air and in vacuum at different temperatures) at room temperature are reported. The results show that the correlation between the change of the Raman spectrum of nanometer Cr2O3 and its crystal size is different from that of other nanometer-sized materials.
Jian Zuo +5 more
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The Raman spectra of the cylophanes
Spectrochimica Acta Part A: Molecular Spectroscopy, 1981Abstract Raman spectra have been obtained for the entire series of [2 n ]-cyclophanes and along with the i.r. spectra, several band assignments have been proposed. A correlation of the frequencies of the in-plane ring modes of the cyclophane with those of the identically substituted methylated benzene has been made.
Paul H. Scudder +3 more
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Raman spectra of Nd1.85Ce0.15CuO4
Solid State Communications, 1991Abstract We present the polarized Raman scattering spectra of the Nd 1.85 Ce 0.15 CuO 4 single crystal at room temperature. In addition to the three known Raman active phonons of this high temperature oxide at 227cm −1 (A 1g ), 330 cm −1 (B 1g ), and 477 cm −1 (E g ), the remaining E g symmetry mode at 122 cm −1 is clearly observed.
Z.V. Popovic, A. Sacuto, M. Balkanski
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On the Raman spectra of mononucleotides
Journal of Molecular Structure, 1990Abstract The Raman spectra of aqueous solutions of 5′-mononucleotides derived from adenine, uracil, guanine and cytosine have been examined in the 1150-950 cm−1 spectral region. The origin of some common bands, not previously reported, has been discussed by taking into account isotopic frequency shifts, depolarization ratios, normal coordinate ...
P. Carmona, M. Molina
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Solid State Communications, 1976
Abstract The crystal structure of K 2 CuF 4 has been studied by means of Raman scattering. The structure is found to belong to the space group D 4 h 5 rather than D 4 h 17 of K 2 NiF 4 between 2 and 800 K because of the distortion arising from the “orbital ordering effect”.
M. Kaneko, G. Kuwabara, A. Misu
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Abstract The crystal structure of K 2 CuF 4 has been studied by means of Raman scattering. The structure is found to belong to the space group D 4 h 5 rather than D 4 h 17 of K 2 NiF 4 between 2 and 800 K because of the distortion arising from the “orbital ordering effect”.
M. Kaneko, G. Kuwabara, A. Misu
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RAMAN SPECTRA OF ALKALI HALIDES
1965Raman spectroscopy is a powerful tool for the study of the structure of matter and the physicochemical problems of the crystalline states of matter. However, in the case of cubic crystals, because of the symmetry properties, most and in some cases all the fundamental modes of vibration are inactive in the Raman effect.
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The Raman Spectra of the Deuteromethanes
The Journal of Chemical Physics, 1936The four deuteromethanes were prepared. Their vibrational Raman spectra were photographed under high dispersion. A total of 20 lines were analyzed. A discussion, in the light of the general theory, is given of a sequence of observed overtones.
George E. MacWood, Harold C. Urey
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The Raman spectra of ferrocene
Chemical Physics Letters, 1969Abstract Raman spectra of ferrocene single crystals are presented and their assignment given. Some of the controversies regarding different assignments given by Lippincott and Nelson and by Stammreich are resolved.
J. Bodenheimer, E. Loewenthal, W. Low
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