Spectroscopic, thermal, magnetic and structural characterization of K 3VF6 prepared at room temperature

R. Nagarajan, Neetu Tyagi, Samuel Lofland, Kandalam Ramanujachary

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A straight forward room-temperature synthesis of V(III) containing complex fluoride K3VF6, using KF and vanadium(III) acetylacetonate is reported. The pale green colored powder was characterized by chemical analysis, powder X-ray diffraction; diffuse reflectance spectroscopy, infrared spectroscopy, Raman spectroscopy, differential scanning calorimetry, scanning electron microscopy, photoluminescence spectroscopy, magnetic susceptibility measurements and photoluminescence spectroscopy. The powder X-ray diffraction pattern was fitted in P21/n space group (monoclinic) with a = 12.106 (1) , b = 17.685 (0) , c = 11.802 (0) , β = 92.23° (1). Differential scanning calorimetry showed phase transitions, occurring at 158 °C and 190 °C. In the FT-IR spectrum, characteristic band for the VF6 3- group was observed at 508 cm-1. The bands observed in the 335-361 cm-1 region and at 504 cm-1 in the room temperature Raman spectrum of K3VF6 corresponded to the F2g and A1g modes, respectively. The ratio of the frequencies (F2g/A1g) observed in the diffuse reflectance spectrum was fitted on the Tanabe-Sugano diagram to determine the Racah parameter B value of 712 cm-1. Magnetic ordering was not observed down to the lowest measured temperature of 5 K.

Original languageEnglish (US)
Pages (from-to)1425-1429
Number of pages5
JournalPolyhedron
Volume30
Issue number8
DOIs
StatePublished - May 17 2011

Fingerprint

Photoluminescence spectroscopy
Differential scanning calorimetry
room temperature
heat measurement
spectroscopy
reflectance
photoluminescence
Powders
Vanadium
scanning
Magnetic susceptibility
chemical analysis
Fluorides
X ray powder diffraction
Temperature
Diffraction patterns
vanadium
fluorides
Raman spectroscopy
Raman scattering

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

Cite this

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title = "Spectroscopic, thermal, magnetic and structural characterization of K 3VF6 prepared at room temperature",
abstract = "A straight forward room-temperature synthesis of V(III) containing complex fluoride K3VF6, using KF and vanadium(III) acetylacetonate is reported. The pale green colored powder was characterized by chemical analysis, powder X-ray diffraction; diffuse reflectance spectroscopy, infrared spectroscopy, Raman spectroscopy, differential scanning calorimetry, scanning electron microscopy, photoluminescence spectroscopy, magnetic susceptibility measurements and photoluminescence spectroscopy. The powder X-ray diffraction pattern was fitted in P21/n space group (monoclinic) with a = 12.106 (1) , b = 17.685 (0) , c = 11.802 (0) , β = 92.23° (1). Differential scanning calorimetry showed phase transitions, occurring at 158 °C and 190 °C. In the FT-IR spectrum, characteristic band for the VF6 3- group was observed at 508 cm-1. The bands observed in the 335-361 cm-1 region and at 504 cm-1 in the room temperature Raman spectrum of K3VF6 corresponded to the F2g and A1g modes, respectively. The ratio of the frequencies (F2g/A1g) observed in the diffuse reflectance spectrum was fitted on the Tanabe-Sugano diagram to determine the Racah parameter B value of 712 cm-1. Magnetic ordering was not observed down to the lowest measured temperature of 5 K.",
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Spectroscopic, thermal, magnetic and structural characterization of K 3VF6 prepared at room temperature. / Nagarajan, R.; Tyagi, Neetu; Lofland, Samuel; Ramanujachary, Kandalam.

In: Polyhedron, Vol. 30, No. 8, 17.05.2011, p. 1425-1429.

Research output: Contribution to journalArticle

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AB - A straight forward room-temperature synthesis of V(III) containing complex fluoride K3VF6, using KF and vanadium(III) acetylacetonate is reported. The pale green colored powder was characterized by chemical analysis, powder X-ray diffraction; diffuse reflectance spectroscopy, infrared spectroscopy, Raman spectroscopy, differential scanning calorimetry, scanning electron microscopy, photoluminescence spectroscopy, magnetic susceptibility measurements and photoluminescence spectroscopy. The powder X-ray diffraction pattern was fitted in P21/n space group (monoclinic) with a = 12.106 (1) , b = 17.685 (0) , c = 11.802 (0) , β = 92.23° (1). Differential scanning calorimetry showed phase transitions, occurring at 158 °C and 190 °C. In the FT-IR spectrum, characteristic band for the VF6 3- group was observed at 508 cm-1. The bands observed in the 335-361 cm-1 region and at 504 cm-1 in the room temperature Raman spectrum of K3VF6 corresponded to the F2g and A1g modes, respectively. The ratio of the frequencies (F2g/A1g) observed in the diffuse reflectance spectrum was fitted on the Tanabe-Sugano diagram to determine the Racah parameter B value of 712 cm-1. Magnetic ordering was not observed down to the lowest measured temperature of 5 K.

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