Substantial increase of the ordering temperature for [MnII/MoIII(CN)7]-based magnets as a function of the 3d ion site geometry: example of two supramolecular materials with Tc = 75 and 106 K

Stéfania Tanase; Floriana Tuna; Philippe Guionneau; Thierry Maris; Guillaume Rombaut; Corine Mathonière; Marius Andruh; Olivier Kahn; Jean-Pascal Sutter

doi:10.1021/ic025990z

Substantial increase of the ordering temperature for [MnII/MoIII(CN)7]-based magnets as a function of the 3d ion site geometry: example of two supramolecular materials with Tc = 75 and 106 K

Inorg Chem. 2003 Mar 10;42(5):1625-31. doi: 10.1021/ic025990z.

Authors

Stéfania Tanase¹, Floriana Tuna, Philippe Guionneau, Thierry Maris, Guillaume Rombaut, Corine Mathonière, Marius Andruh, Olivier Kahn, Jean-Pascal Sutter

Affiliation

¹ Institut de Chimie de la Matière Condensée de Bordeaux, UPR CNRS No. 9048, F-33608 Pessac, France.

PMID: 12611531
DOI: 10.1021/ic025990z

Abstract

Two molecule-based magnets, [Mn(2)(tea)Mo(CN)(7)].H(2)O, 1, and [Mn(2)(tea)Mo(CN)(7)], 2 (tea stands for triethanolamine), formed with the 4d ion building block, [Mo(CN)(7)](4)(-), Mn(II) ions, and an additional ligand, tea, have been prepared and structurally characterized by single-crystal X-ray analyses. Whereas 1 is obtained by a self-assembling process in solution, compound 2 is quantitatively formed through a smooth thermal treatment of 1. Their magnetic properties revealed that these compounds exhibit magnetic ordering at T(c) = 75 and 106 K respectively for compounds 1 and 2. The difference for their critical temperature is attributed to the geometry of the coordination sphere of a Mn(II) site found to be square-pyramidal for 1 and tetrahedral for 2.