1. Two new ferrimagnetic MnII-carboxylate coordination polymers constructed from 5-tert-butyl isophthalic acid with (5/2, 15/2) and (5/2, 10/2) spin topologies
- Author
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Zhang-Zhen He, Ping Lin, Shao-Wu Du, Zhi-Hua Li, and Chong-Bin Tian
- Subjects
Diffraction ,chemistry.chemical_classification ,Tert butyl ,Hydrogen bond ,Stereochemistry ,General Chemistry ,Crystal structure ,Polymer ,Condensed Matter Physics ,Isophthalic acid ,Crystallography ,chemistry.chemical_compound ,chemistry ,Ferrimagnetism ,General Materials Science ,Carboxylate - Abstract
Two new MnII coordination polymers, {[Mn4(TBIP)4(CH3OH)2]·(H2O)2}n (1) and {[Mn3(TBIP)2(HTBIP)2((CH3)2CHOH)2]}n (2) (H2TBIP = 5-tert-butyl isophthalic acid), have been synthesized by a solvothermal reaction and characterized magnetically. Single-crystal X-ray diffraction studies reveal that 1 is a three-dimensional framework, which is based on a helical chain with a new periodic –J1J1J2J2– sequence. Compound 2 has a two dimensional layer structure constructed by trinuclear Mn(II) subunits that are extended into a 3D architecture by hydrogen bonds. Magnetic measurements indicate that both of the compounds show ferrimagnetic behaviour with different spin topologies. Compound 1 is a rare even-spin centre homometallic ferrimagnetic compound, in which the ferrimagnetism arises from the nature of carboxylate bridging modes. It is also the first example of a 3D homometallic ferrimagnetic compound, featuring a ferrimagnetic helical chain with a (5/2, 15/2) spin topology and a 1/2 magnetization plateau. Compound 2 is a three-spin centre homometallic ferrimagnetic complex with a (5/2, 10/2) spin topology and a 1/3 magnetization plateau.
- Published
- 2011
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