TY - JOUR
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.
UR - http://www.scopus.com/inward/record.url?scp=79954996168&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79954996168&partnerID=8YFLogxK
U2 - 10.1016/j.poly.2011.03.012
DO - 10.1016/j.poly.2011.03.012
M3 - Article
AN - SCOPUS:79954996168
SN - 0277-5387
VL - 30
SP - 1425
EP - 1429
JO - Polyhedron
JF - Polyhedron
IS - 8
ER -