In the present study we report the structural and magnetic response of the 3-D cyano-bridged
magnetic sponge-like system {[Mn
II
(pydz)(H
2
O)
2
][Mn
II
(H
2
O)
2
][Nb
IV
(CN)
8
]
?
3H
2
O}
n
A
to external
pressure up to 1.8 GPa using single-crystal crystallography and magnetic measurements. The
observed pressure-induced structural changes: shrinkage of the Nb–C bonds and bending of Mn–
NC–Nb linkages are responsible for the strengthening of the antiferromagnetic interactions between
Mn and Nb centers and consequently for the substantial increase of the magnetic ordering
temperature from 43 K to 51 K under 0.57 GPa. The observed magneto-structural response to
external pressure is similar in nature to the removal of guest molecules and confirms the significant
susceptibility of molecular magnetic sponges to mechanical stress.
departmental parameterization:
35
affiliation:
Wydział Chemii : Zakład Chemii Nieorganicznej, Wydział Chemii : Zakład Krystalochemii i Krystalofizyki