Journal
NEW JOURNAL OF CHEMISTRY
Volume 42, Issue 2, Pages 1347-1355Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7nj03585c
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Funding
- SCAIT [D542/2]
- CONICET [PIP 11220130100651CO, PIP 0205, PIP 11220120100360]
- ANPCyT [PICT 2013-0697, PICT 2016-0226, PICT 2012-3079]
- CONICET
- SECYT-UNC [366/16]
- CONACyT (Mexico) [2013-05-231461, CB-2014-01-235840]
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Four coordination polymers obtained by the intercalation of 2-methylimidazole into transition metal nitroprussides T[Fe(CN)(5)NO] with T = Mn, Fe, Co and Ni were synthesized and characterized. The resulting hybrid inorganic-organic solids crystallize as dihydrates. All the solids were crystallized in an orthorhombic crystal system in the space group P2(1)2(1)2(1). Their crystal structures were solved and refined from X-ray diffraction data, complemented by structural information derived from spectroscopic (IR, Raman and UV-Vis) and thermal data. The intercalated molecules occupy the axial coordination sites of the metal T(II), while the Fe atom of the nitroprusside anion preserves the octahedral coordination geometry. In the interlayer region, the intercalated molecules retain their interaction through p-stacking interactions. The magnetic measurements indicate that all the solids show antiferromagnetic interactions at low temperatures due to intra-sheet antiferromagnetic exchange interactions of moderate strength. Only complexes with Fe(II) and Mn(II) show long-range inter-sheet ferromagnetic ordering.
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