Generalized coupled oscillator model for defect polymers. I. Calculation of frequency branches of n-paraffins, fatty acids and glymes

Loghinov, A. P.; Kozyrenko, V. N.; Mikhailov, I. D.; Chukhanov, N.V.; Kumpanenko, I. V.

doi:10.1016/0301-0104(79)85005-3

Cited by 11 publications

(3 citation statements)

References 9 publications

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“…In the present work a method for theoretical analysis of vibrational spectra of finite rectangular two-dimensional lattice segments (island) with one degree of freedom per unit cell is proposed. In terms of the unit cell normal coordinates [8], the results obtained are easy to extend to lattices with an arbitrary number of freedom degrees per unit cell.…”

Section: Sf Ippolitova Et Almentioning

confidence: 86%

Vibrational spectra of monolayer islands on single crystal faces. Island size and shape effects on infrared frequencies, intensities and bandwidths

et al. 1988

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Abstract.A method for theoretical analysis spectra of rectangular segments (islands) of two-dimensional ordered overlayers of adsorbed species has been proposed. The simple formulae for frequencies, absorption coefficients and bandwidths as functions of island size and shape have been deduced. If frequencies and bandwidths of appropriate bands in infrared spectra of chemisorbed monolayers are measured simultaneously, the size and shape of the islands can be estimated.

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Section: Sf Ippolitova Et Almentioning

confidence: 86%

Vibrational spectra of monolayer islands on single crystal faces. Island size and shape effects on infrared frequencies, intensities and bandwidths

et al. 1988

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“…The bands of CH 3 , which are close in frequencies, can contribute to the bands at 1382 and 1463 cm -1 . This spectrum also comprises characteristic bands of chains (CH 2 ) n with n = 3 (810 cm -1 ), n = 4 (748 cm -1 ), and n > 4 (725 cm -1 ) (Loghinov et al, 1979;Chukanov and Kumpanenko, 1988), O-H stretching vibrations (3400 cm -1 ), C=O groups (1714 cm -1 ), and isolated (non conjugated) bonds C=C (1608 cm -1 ).…”

Section: Infrared Spectroscopymentioning

confidence: 99%

Relationship between oxosilicate niobium mineralization and organic matter in alkaline pegmatites of the Khibiny pluton, Kola Peninsula

et al. 2010

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In alkaline pegmatites of the Khibiny pluton niobium oxosilicates with (Nb + Ti)/Si ≥ 1 and Nb > Ti occur in intimate fine intergrowths with endogenic organic matter, which makes it possible to assume a genetic relationship between them. Such intergrowths from pegmatites of Mounts Kukisvumchorr and Koashva have been studied by electron microscopy, electron microprobe, IR spectroscopy, and exclusion chromatography. Unsaturated hydrocarbon groups, including aromatic ones, and carboxylate groups are prevalent in the organic matter intergrown with the niobium oxosilicates . The molecular weight distribution in the part of the bitumen soluble in tetrahydrofurane is polymodal, probably due to its formation as a result of parallel reactions on several catalytic centers of polymerization.

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“…At high contents of Ca, there are linear sequences C Na (C Ca ) n C Na of Ca-bearing clusters C Ca confined by Ca-free ones, which results in the generation of chain vibrations due to the resonance between n 3 -type vibrations of neighboring Na 2 Ca(CO 3 ) clusters. This vibrational problem was solved by us earlier (Loghinov et al 1979, Chukanov & Kumpanenko 1988. The solution of a secular equation results in the following analytical expression for the dependence of the wavenumber n 3 * of the IR-active band of chain vibrations on n:…”

Section: Local Vibrations Of Extra-framework Groupsmentioning

confidence: 99%

Crystal Chemistry of Cancrinite-Group Minerals With an Ab-Type Framework: A Review and New Data. Ii. Ir Spectroscopy and Its Crystal-Chemical Implications

Чуканов¹,

Pekov²,

Olysych³

et al. 2011

The Canadian Mineralogist

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We present a comparative analysis of powder infrared spectra of cancrinite-group minerals with the simplest framework, of AB type, from the viewpoint of crystal-chemical characteristics of extra-framework components. We provide IR spectra for typical samples of cancrinite, cancrisilite, kyanoxalite, hydroxycancrinite, depmeierite, vishnevite, pitiglianoite, balliranoite, davyne and quadridavyne, as well as the most unusual varieties of cancrinite-subgroup minerals (Ca-deficient cancrinite, H 2 O-free cancrinite, intermediate members of the series cancrinite -hydroxycancrinite, cancrinite-cancrisilite, cancrinitekyanoxalite, K-rich vishnevite, S 2 -bearing balliranoite). Samples with solved crystal structures are used as reference patterns. Empirical trends and relationships between some parameters of IR spectra, compositional characteristics and unit-cell dimensions are obtained. The effect of Ca content on stretching vibrations of CO 3 2is explained in the context of the cluster approach. The existence of a hydrous variety of quadridavyne is demonstrated.

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Generalized coupled oscillator model for defect polymers. I. Calculation of frequency branches of n-paraffins, fatty acids and glymes

Cited by 11 publications

References 9 publications

Vibrational spectra of monolayer islands on single crystal faces. Island size and shape effects on infrared frequencies, intensities and bandwidths

Vibrational spectra of monolayer islands on single crystal faces. Island size and shape effects on infrared frequencies, intensities and bandwidths

Relationship between oxosilicate niobium mineralization and organic matter in alkaline pegmatites of the Khibiny pluton, Kola Peninsula

Crystal Chemistry of Cancrinite-Group Minerals With an Ab-Type Framework: A Review and New Data. Ii. Ir Spectroscopy and Its Crystal-Chemical Implications

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