scholarly journals On the influence of clustering processes in the liquid structure on Raman scattering

2021 ◽  
Vol 344 ◽  
pp. 01010
Author(s):  
Gennady Melnikov ◽  
Nikolay Ignatenko ◽  
Lyudmila Petrova ◽  
Olga Manzhos ◽  
Andrey Gromkov
Keyword(s):  
Raman Spectrum ◽  
Raman Scattering ◽  
Fibonacci Numbers ◽  
Wavelength Region ◽  
Condensed Medium ◽  
Liquid Structure ◽  
Mutual Position ◽  
Spectral Bands ◽  
Proposed Model ◽  
Number Of Particles

A mathematical relation has been obtained that makes it possible to calculate the polarizability of a polyatomic molecule in the structure of a cluster. It is shown that the scattered frequencies in the Raman effect are proportional to the square root of the number of particles in the most probable (or average) cluster in the liquid structure. The appearance of frequencies in the far part of the Raman spectrum region is caused by the processes of intermolecular interactions in clusters and the processes of disintegration or formation of cluster systems in the structure of disordered condensed media. According to the proposed model and experimental data in the frequency range 20–1300 cm-1, it has been carried out the comparison of the values of the calculated frequencies of the Raman spectrum and their mutual position, which has shown the adequacy of the proposed model. The cluster model of liquid structure and the methods of mathematical statistics and statistical thermodynamics make it possible to expand the capabilities of the classical theory of Raman scattering in liquids and to predict the position of spectral bands in Raman spectra in the far long-wavelength region of the spectrum. It is revealed that the formation and breakdown of the most probable clusters is associated with the correlations of the most stable clusters (in terms of the number of particles) in a condensed medium with the Fibonacci numbers.

Theoretical Analysis of Time-Resolved Coherent Anti-Stokes Raman Scattering Method for Obtaining the Whole Raman Spectrum of Biomolecules

2010 ◽  
Vol 30 (7) ◽  
pp. 2136-2141
Author(s):  
尹君 Yin Jun ◽  
于凌尧 Yu Lingyao ◽  
屈军乐 Qu Junle ◽  
牛憨笨 Niu Hanben ◽  
林子扬 Lin Ziyang
Keyword(s):  
Raman Spectrum ◽  
Theoretical Analysis ◽  
Raman Scattering ◽  
Scattering Method ◽  
Time Resolved ◽  
Anti Stokes

scholarly journals Hydration and ion pair formation in common aqueous La(iii) salt solutions – a Raman scattering and DFT study

2015 ◽  
Vol 44 (1) ◽  
pp. 295-305 ◽  
Author(s):  
Wolfram W. Rudolph ◽  
Gert Irmer
Keyword(s):  
Raman Spectrum ◽  
Raman Scattering ◽  
Ion Pair ◽  
Pair Formation ◽  
Dft Study ◽  
Salt Solutions ◽  
Left Hand ◽  
Ion Pair Formation ◽  
Right Hand

Left hand side: Raman spectrum of a 0.622 mol L−1La(ClO4)3(aq). Weak, polarized band at 343 cm−1assigned to symmetric La–O stretch of [La(OH2)9]3+. Bands at 463 and 630 cm−1due to ClO4−(aq). The inset shows the isotropic band in more detail. Right hand side: Structure of [La(OH2)9]3+(symmetryD3).

FIRST ORDER RAMAN SCATTERING FROM SEMICONDUCTOR QUANTUM DOTS

1989 ◽  
Vol 03 (08) ◽  
pp. 1167-1181 ◽  
Author(s):  
P.A.M. RODRIGUES ◽  
HILDA A. CERDEIRA ◽  
F. CERDEIRA
Keyword(s):  
Crystal Structure ◽  
Quantum Dots ◽  
Raman Spectrum ◽  
Raman Scattering ◽  
Bulk Material ◽  
Semiconductor Quantum Dots ◽  
Polycrystalline Materials ◽  
Nanometer Size ◽  
First Order ◽  
Linear Dimensions

We develop a model appropriate for describing the Raman spectrum of samples, containing a collection of semiconductor quantum dots with and without dispersion in their linear dimensions. These nanometer size crystallites are assumed to have the same atomic arrangement as that of the bulk material and to be embedded in a host material made up of a different semiconductor of the same crystal structure. The results from our calculations are compared to previous models for polycrystalline materials.

Analysis and Explanation of Agglomeration Phenomenon Based on Raman Spectrum

2015 ◽  
Vol 1096 ◽  
pp. 288-291
Author(s):  
Hai Ling Li ◽  
Geng Xin Sun ◽  
Shui Qing Jiang ◽  
Sheng Bin
Keyword(s):  
Raman Spectrum ◽  
Raman Scattering ◽  
Spectrum Analysis ◽  
Material Science ◽  
Gallium Phosphide ◽  
Basic Fuchsin ◽  
Molecular Configuration

In this paper, from the standpoint of Raman spectrum research aspect in material science, Raman spectrum analysis of graphite and diamond microcrystal retained by gallium phosphide nanoparticles is introduced. We found that molecular configuration of basic fuchsin adsorbed on gallium phosphide nanoparticles through experiments. Based on these, Raman scattering is used for analyzing basic fuchsin adsorbed on surface of gallium phosphide nanoparticles. Moreover, we discuss the corresponding meanings of agglomeration phenomenon from the perspective of material.

The stimulated Raman spectrum of water and its relationship to liquid structure

1975 ◽  
Vol 63 (12) ◽  
pp. 5390-5400 ◽  
Author(s):  
Mark Sceats ◽  
Stuart A. Rice ◽  
J. E. Butler
Keyword(s):  
Raman Spectrum ◽  
Liquid Structure ◽  
Stimulated Raman

The single crystal Raman spectrum of orthorhombic PbCl2

1970 ◽  
Vol 48 (18) ◽  
pp. 2931-2933 ◽  
Author(s):  
G. A. Ozin
Keyword(s):  
Raman Spectrum ◽  
Raman Scattering ◽  
Single Crystal ◽  
Lattice Vibrations ◽  
Polarized Raman ◽  
Oriented Single Crystal

The frequencies and symmetries of the even parity lattice vibrations of orthorhombic lead dichloride are determined by means of polarized Raman scattering from an oriented single crystal. The frequencies of the vibrations are interpreted in terms of symmetry co-ordinates and by comparison with the modes of the isomorphous lead dibromide.

Intermolecular Vibrations in Fullerene Systems

1994 ◽  
Vol 359 ◽  
Author(s):  
M.G. Mitch ◽  
G.P. Lopinski ◽  
J.S. Lannin
Keyword(s):  
Raman Spectrum ◽  
Alkali Metal ◽  
Raman Scattering ◽  
Octahedral Site ◽  
Low Frequency ◽  
Bulk Materials ◽  
Complementary Information ◽  
Disorder Effects ◽  
Site Disorder ◽  
Intermolecular Vibrations

ABSTRACTIntermolecular vibrations in a variety of fullerene systems are reported that provide information on C60-C60 and alkali-metal - C60 interactions and disorder effects. Low frequency Raman scattering in laser polymerized C60 films are shown to exhibit additional modes not reported for bulk materials. This result is consistent with recent dimer calculations. Raman scattering and HREELS measurements are shown to provide complementary information on alkali-metal motions in K3C60. In FCC Na6C60 both octahedral site disorder effects and reduced Na-C bond lengths account for changes in the Raman spectrum relative to Na3C60.

Raman Investigation of Photopolymerization Reactions of Single Optically Levitated Microparticles

1996 ◽  
Vol 50 (7) ◽  
pp. 823-828 ◽  
Author(s):  
C. Esen ◽  
T. Kaiser ◽  
G. Schweiger
Keyword(s):  
Raman Spectroscopy ◽  
Raman Spectrum ◽  
Raman Scattering ◽  
Polymerization Reaction ◽  
Single Particles ◽  
On Line ◽  
Optical Levitation ◽  
Monomer Droplet ◽  
Arc Excitation

Raman spectroscopy was used to investigate polymerization reactions in a single micrometer-sized monomer droplet. An Ar+ laser levitated the microparticles and simultaneously excited the Raman scattering. The polymerization reaction was initiated by exposing the monomer droplets to the UV radiation of a mercury arc excitation lamp. The Raman spectrum of the reacting particle was investigated on-line. The results demonstrate that the combination of the technique of optical levitation and Raman spectroscopy allows nondestructive in situ measurements of single particles and is therefore very useful for the study of fundamental processes.

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