Are nanojars unique to copper? Solution and solid state characterization of high-symmetry octanuclear nickel(II)-pyrazolate complexes

Supramolecular Incarceration and Extraction of Tetrafluoroberyllate from Water by Nanojars

“…The largest shifts are observed in the case of the Cu 10 ring of the Cu 28 nanojar, for both pyrazolate (40.25 ppm) and OH (−60.27 ppm) protons. Because analogous nanojars with diamagnetic metal ions (such as Zn 2+ or low-spin Fe 2+ ) cannot be obtained, hyperfine shift values are not available.…”

“…4 and Table S9). The presence of paramagnetic Cu nanojars with diamagnetic metal ions (such as Zn 2+ or low-spin Fe 2+ ) cannot be obtained, 39 hyperfine shift values are not available.…”

Anionic or neutral? the charge of Ni8 cubes in metal–organic framework compounds

“…This journal is © The Royal Society of Chemistry 2022 could not be resolved due to the statistical distribution, the comparison of the parameters showed considerable deviations. While the cell parameters for 1a and 2a are similar (a = 25.4003(3), a = 90 for 1a and a = 25.3948 (5), a = 90 for 2a), 1a shows a slight compression of the cell after activation at 200 1C under vacuum (a = 25.3036 (11), a = 90). This can be explained by a reduction in the dimensions of the Ni 8 cube due to the neutral state in comparison to the anionic SBU, as the electrostatic repulsion decreases within the SBU.…”

“…For example, a cube-shaped SBU with Ni(II) cations at the cube corners, hydroxides at the cube faces, and 12 points of extension in the form of the cube edges occupied by pyrazolates (pz) was described in terms of the anionic SBU [Ni 8 (OH) 6 (pz) 12 ] 2À in various complexes (Scheme 1). [5][6][7] The integration of this SBU into pyrazolate-based MOFs through the use of multidentate ligands is of great interest, as they exhibit extremely high stability due to strong Ni-N coordination bonds and, due to their cubic nature, opening the door to intriguing, highly porous structures that offer numerous potential applications. [8][9][10][11][12][13][14][15][16] This was first achieved by Masciocchi et al 17 where they investigated in detail the nature of the face-bridging ligands and hence the charge of the network (neutral or anionic), as the charge is elementary for its characteristics.…”

Bis(μ2-benzoato-κ2 O,O′)bis(benzoato-κO)bis(ethanol-κO)bis(μ3-hydroxido)hexakis(μ-pyrazolato-κ2 N,N′)hexacopper(II) ethanol disolvate

“…in oxidases, oxygenases, or reductases) and as magnetic units to investigate spin-exchange interactions of metal cations (Kupcewicz et al, 2013;Viciano-Chumillas et al, 2007). Moreover, they make up triangular arrangements of nanojars which consist of structurally diverse supramolecular coordination complexes containing host frameworks that can trap small inorganic anions such as CO 3 , as well as NO 3 À , and ClO 4 À (Hartman & Mezei, 2017;Mezei, 2016;Al Isawi et al, 2018). Such supramolecular motifs can also mimic the imidazole metalbinding properties in active sites of metalloenzymes (Kupcewicz et al, 2013;Viciano-Chumillas et al, 2007;Mezei, 2016;Al Isawi et al, 2018).…”