New one-dimensional spin transition coordination polymers of formula [Fe(NH(2)trZ)(3)](AF(6)) center dot nH(2)O (A = Ti, Zr, Sn; NH(2)trz = 4-amino-1,2,4-triazole) have been synthesized in MeOH and EtOH media. These materials display an abrupt and hysteretic spin transition around 200 K as well as a reversible thermochromic effect on, cooling. A preliminary evaluation of the lattice dynamics in the high-spin and low-spin states is presented. (c) 2006 Elsevier Ltd. All rights reserved.
New one-dimensional spin transition coordination polymers of formula [Fe(NH(2)trZ)(3)](AF(6)) center dot nH(2)O (A = Ti, Zr, Sn; NH(2)trz = 4-amino-1,2,4-triazole) have been synthesized in MeOH and EtOH media. These materials display an abrupt and hysteretic spin transition around 200 K as well as a reversible thermochromic effect on, cooling. A preliminary evaluation of the lattice dynamics in the high-spin and low-spin states is presented. (c) 2006 Elsevier Ltd. All rights reserved.
Etude du fluorostannate FeSnF6 par resonance Mössbauer des noyaux 57Fe et 119Sn
作者:C Mirambet、L Fournes、J Grannec、P Hagenmuller
DOI:10.1016/0025-5408(91)90069-x
日期:1991.8
The hexafluorostannate FeSnF6 undergoes at 728 +/- 5K a phase transition characterized by micro-DTA. A Mossbauer resonance investigation has been carried out over the 4.2 less-than-or-equal-to T less-than-or-equal-to 635 K temperature range on the two nuclei Fe-57 and Sn-119. From the study on the Fe-57 nucleus the existence of a high temperature phase transition has been ascertained. Evidence is given by the Mossbauer investigation on the Sn-119 nucleus that the dynamic lattice parameters of FeSnF6 and SnF4 are similar despite the structural differences.