Raman spectroscopic study of the tellurite minerals: Carlfriesite and spiroffite

Frost, Ray L.; Dickfos, Marilla J.; Keeffe, Eloise C.

doi:10.1016/j.saa.2008.06.014

Cited by 9 publications

(3 citation statements)

References 31 publications

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“…It is important to note that the spectrum of Ag–TePh presented a broad band at ~715 cm –1 . This band is characteristic to Te–O stretching vibrations and indicates partial oxidation of the Ph–Te units after their functionalization on the surface of Ag . This is an interesting result and illustrates an important difference regarding the functionalization of organotellurium compounds on Au and Ag NPs.…”

Section: Resultsmentioning

confidence: 68%

“…This band is characteristic to Te-O stretching vibrations and indicates partial oxidation of the Ph-Te units after their functionalization on the surface of Ag. [42][43][44] This is an interesting result and illustrates an important difference regarding the functionalization of organotellurium compounds on Au and Ag NPs. While the functionalization can be performed in Au, the Ag-Te bond may not be stable enough to prevent partial oxidation of the Te-Ph moiety.…”

Section: Resultsmentioning

confidence: 97%

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Functionalization of gold and silver nanoparticles with diphenyl dichalcogenides probed by surface enhanced Raman scattering

Takata¹,

Gonçalves²,

Ando

et al. 2011

J Raman Spectroscopy

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This paper describes a surface‐enhanced Raman scattering (SERS) systematic investigation regarding the functionalization of gold (Au) and silver (Ag) nanoparticles with diphenyl dichalcogenides, i.e. diphenyl disulfide, diphenyl diselenide, and diphenyl ditelluride. Our results showed that, in all cases, functionalization took place with the cleavage of the chalcogen–chalcogen bond on the surface of the metal. According to our density functional theory calculations, the molecules assumed a tilted orientation with respect to the metal surface for both Au and Ag, in which the angle of the phenyl ring relative to the metallic surface decreased as the mass of the chalcogen atom increased. The detected differences in the ordinary Raman and SERS spectra were assigned to the distinct stretching frequencies of the carbon–chalcogen bond and its relative contribution to the ring vibrational modes. In addition, the SERS spectra showed that there was no significant interaction between the phenyl ring and the surface, in agreement with the tilted orientation observed from our density functional theory calculations. The results described herein indicate that diphenyl dichalcogenides can be successfully employed as starting materials for the functionalization of Au nanoparticles with organosulfur, organoselenium, and organotellurium compounds. On the other hand, diphenyl disulfide and diphenyl diselenide could be employed for the functionalization of Ag nanoparticles, while the partial oxidation of the organotellurium unit could be detected on the Ag surface. Copyright © 2011 John Wiley & Sons, Ltd.

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Section: Resultsmentioning

confidence: 68%

Section: Resultsmentioning

confidence: 97%

Functionalization of gold and silver nanoparticles with diphenyl dichalcogenides probed by surface enhanced Raman scattering

Takata¹,

Gonçalves²,

Ando

et al. 2011

J Raman Spectroscopy

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“…Some previous studies have been undertaken by the authors, using Raman spectroscopy to study complex secondary minerals formed by crystallization from concentrated solutions. The authors have studied sonorite using Raman spectroscopy [13] as well as other tellurite minerals [14][15][16][17][18][19]. In this work we have extending our studies of sonorite by undertaking chemical analysis and electron microscopic studies.…”

Section: Introductionmentioning

confidence: 99%

A SEM, EDS and vibrational spectroscopic study of the tellurite mineral: Sonoraite Fe3+Te4+O3(OH)·H2O

Frost

López

Scholz

2015

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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We have undertaken a study of the tellurite mineral sonorite using electron microscopy with EDX combined with vibrational spectroscopy. Chemical analysis shows a homogeneous composition, with predominance of Te, Fe, Ce and In with minor amounts of S. Raman spectroscopy has been used to study the mineral sonoraite an examples of group A(XO₃), with hydroxyl and water units in the mineral structure. The free tellurite ion has C₃v symmetry and four modes, 2A₁ and 2E. An intense Raman band at 734 cm(-1) is assigned to the ν₁ (TeO₃)(2-) symmetric stretching mode. A band at 636 cm(-1) is assigned to the ν₃ (TeO₃)(2-) antisymmetric stretching mode. Bands at 350 and 373 cm(-1) and the two bands at 425 and 438 cm(-1) are assigned to the (TeOv)(2-)ν₂ (A₁) bending mode and (TeO₃)(2-)ν₄ (E) bending modes. The sharp band at 3283 cm(-1) assigned to the OH stretching vibration of the OH units is superimposed upon a broader spectral profile with Raman bands at 3215, 3302, 3349 and 3415 cm(-1) are attributed to water stretching bands. The techniques of Raman and infrared spectroscopy are excellent for the study of tellurite minerals.

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Raman Spectra of Minerals

Чуканов

Вигасина

2019

Vibrational (Infrared and Raman) Spectra of Minerals and Related Compounds

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Raman spectroscopic study of the tellurite minerals: Carlfriesite and spiroffite

Abstract: Raman spectroscopy has been used to study the tellurite minerals spiroffite

Cited by 9 publications

References 31 publications

Functionalization of gold and silver nanoparticles with diphenyl dichalcogenides probed by surface enhanced Raman scattering

Functionalization of gold and silver nanoparticles with diphenyl dichalcogenides probed by surface enhanced Raman scattering

A SEM, EDS and vibrational spectroscopic study of the tellurite mineral: Sonoraite Fe3+Te4+O3(OH)·H2O

Raman Spectra of Minerals

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