Coordination Polymers of Ni(II) with Thiophene Ligands: Synthesis, Structures, and Magnetic Properties

Dubskikh, V. A.; Lysova, Anna A.; Самсоненко, Д. Г.; Lavrov, Aleksandr N.; Dybtsev, Danil N.; Fedin, Vladimir P.

doi:10.1134/s107032842110002x

Cited by 9 publications

(1 citation statement)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[85], together with a small additional intermetal exchange interaction zJ/k B ≈ 0.17 K (z is the number of nearest neighbors). The obtained D value is typical of Ni(II) complexes [86], while the small zJ value may indicate a tiny intermetal magnetic exchange in 2. Given the immeasurably low exchange interaction found in isostructural Co compounds, it is not certain whether the small additional term observed for 2 is actually reflecting the intermetal exchange, or if it comes from an unaccounted single-ion feature.…”

Section: Magnetization Measurementsmentioning

confidence: 81%

Flexible Co(II)-and Ni(II)-Based Cationic 2D Metal–Organic Frameworks Based on a Charge-Neutral (O,O)-Donor Bridge

et al. 2023

View full text Add to dashboard Cite

Two new metal–organic frameworks based on highly flexible 1,4-diazabicyclo[2.2.2]octane N,N′-dioxide (odabco) ligands were successfully synthesized and characterized. Their crystallographic formulae are [M(DMF)2(odabco)2](ClO4)2·dioxane, where M2+ = Co2+ (1) and Ni2+ (2), and DMF is N,N-dimethylformamide. The title compounds possess cationic 2D coordination networks filled with perchlorate anions and dioxane solvent molecules in the interlayer space, with 20% solvent accessible volume. Carbon dioxide adsorption measurements for desolvated samples 1a and 2a gave 511 m2/g and 377 m2/g specific surface areas, respectively, revealing the first example of gas adsorption properties in the structure based on a flexible odabco bridge, despite the presence of large counteranions within the positively charged network. Magnetization measurements for 1, 1a, 2 and 2a reveal their paramagnetic nature to be in a reasonable agreement with crystal structures, and almost no solvent dependence of the magnetization characteristics. A decrease in the effective magnetic moment observed at low temperatures is attributed mostly to zero-field level-splitting in the octahedral Ni2+ and Co2+ ions.

show abstract

Section: Magnetization Measurementsmentioning

confidence: 81%