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RESEARCH PRODUCT
Synthesis, crystal structures and magnetic properties of picolinate-bridged copper(II) chains
Carlos Giménez-saizYan DuanFrancisco M. RomeroCarlos Martín-mezquitaVerónica Jornet-mollásubject
010405 organic chemistryDimerIntermolecular forcechemistry.chemical_elementTrimerCrystal structure010402 general chemistry01 natural sciencesCopper0104 chemical sciencesIonchemistry.chemical_compoundCrystallographychemistryMaterials ChemistryAntiferromagnetismMetal-organic frameworkPhysical and Theoretical Chemistrydescription
The paper reports the synthesis, crystal structures, and magnetic properties of two copper(II) coordination polymers, Cu2(L1)4 (1) and Cu3(L2)6 (2), based on rigid ethynylene-bridged ditopic ligands containing one picolinate subunit (L1 = 5-(pyridin-3-ylethynyl)picolinate anion; L2 = 5-((4-(methoxycarbonyl)phenyl)ethynyl)picolinate anion). Both 1 and 2 have a chain structure. In 1, the repeating unit in the chain is a doubly bridged picolinate dicopper(II) complex, whereas 2 is built upon trimeric units where the Cu2+ ions are also connected by double picolinate bridges. Both compounds exhibit antiferromagnetic interactions in the solid state. The magnetic properties of 1 and 2 were analyzed in terms of simple dimer (H = –2JSCuSCu) and linear trimer [H = –2J(SCu1SCu2+SCu2SCu1)] models, respectively, neglecting the intermolecular interactions between the polynuclear units. The values of the exchange coupling parameters were J = −0.59 and J = –0.30 cm−1 for 1 and 2, respectively.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-02-15 |