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

R. Nagarajan; Neetu Tyagi; Samuel Lofland; K. V. Ramanujachary

doi:10.1016/j.poly.2011.03.012

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

R. Nagarajan
, Neetu Tyagi
, Samuel Lofland
, K. V. Ramanujachary

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

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 F_2g and A_1g modes, respectively. The ratio of the frequencies (F_2g/A_1g) 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 language	English (US)
Pages (from-to)	1425-1429
Number of pages	5
Journal	Polyhedron
Volume	30
Issue number	8
DOIs	https://doi.org/10.1016/j.poly.2011.03.012
State	Published - May 17 2011

All Science Journal Classification (ASJC) codes

Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

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10.1016/j.poly.2011.03.012

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@article{785d15bbcee3449ead84ca2055eb7359,

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.",

author = "R. Nagarajan and Neetu Tyagi and Samuel Lofland and Ramanujachary, \{K. V.\}",

note = "Funding Information: The authors record their sincere and grateful thanks to University of Delhi and Department of Science and Technology (Nanomission) , Government of India for the financial support for carrying out this work. We are thankful to Dr. S. Uma, Department of Chemistry, University of Delhi, Delhi for sharing the experimental facilities. SEL acknowledges support by NSF–MRSEC under grant No. DMR 0520471 . KVR thanks the DST of Government of India for CP-STIO award.",

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T1 - Spectroscopic, thermal, magnetic and structural characterization of K 3VF6 prepared at room temperature

AU - Nagarajan, R.

AU - Tyagi, Neetu

AU - Lofland, Samuel

AU - Ramanujachary, K. V.

N1 - Funding Information: The authors record their sincere and grateful thanks to University of Delhi and Department of Science and Technology (Nanomission) , Government of India for the financial support for carrying out this work. We are thankful to Dr. S. Uma, Department of Chemistry, University of Delhi, Delhi for sharing the experimental facilities. SEL acknowledges support by NSF–MRSEC under grant No. DMR 0520471 . KVR thanks the DST of Government of India for CP-STIO award.

PY - 2011/5/17

Y1 - 2011/5/17

N2 - 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.

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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DO - 10.1016/j.poly.2011.03.012

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JO - Polyhedron

JF - Polyhedron

IS - 8

ER -

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

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