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Synthesis, structure and properties of Ni(II) coordination polymer based on α,α-dimethyl substituted zoledronate.
Autorzy
Rok wydania
2018
Czasopismo
Numer woluminu
141
Strony
44-51
DOI
10.1016/j.poly.2017.11.018
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
The reaction of α,α-dimethyl substituted derivative of zoledronic acid with Ni(II) afforded 1D coordination polymer, Ni3(HL)2(H2O)6·6H2O (1). The title compound possess crystallographically and spectroscopically distinct Ni1 and Ni2 centers characterized by tetragonality distortion parameter T = 0.97 and 1.04, respectively, and is isomorphous with recently reported Co3(HL)2(H2O)6·6H2O complexes based on α,α-dimethyl and cyclopropyl substituted zoledronate derivatives.
Detailed analysis of thermal stability of 1 revealed that partly dehydrated [Ni3(HL)2(H2O)3] still retains its architecture and structural integrity of coordinated ligands. Exploring supramolecular interactions that build up the crystal of 1 and related Co(II) complexes allowed a conclusion that distinct dehydration pathways observed for each compound may be correlated with subtle differences in 3D crystals packing. Ni2(P2O7) salt was identified as the major final product of thermolysis of 1.
The magnetic properties of 1 analyzed in term of a spin-1 Heisenberg Ni2Ni1Ni2 trimer chains model revealed antiferromagnetic Ni1⋯Ni2 interactions within the trimers (J1 = −7.32 cm−1) and ferromagnetic Ni2⋯Ni2 intertrimers coupling (ΘW = 1.72 K). Furthermore, different values of the axial zfs D parameters and the g-factors were assigned to the Ni1 and Ni2 centers.
Słowa kluczowe
Zoledronic acid, Coordination polymers, Transition metals, X-ray crystallography, Thermal stability, Magnetic properties
Adres publiczny
http://doi.org/10.1016/j.poly.2017.11.018
Strona internetowa wydawcy
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