Can the Clusters Zr₆O₄(OH)₄(OOCR)₁₂ and [Zr₆O₄(OH)₄(OOCR)₁₂]₂ Be Converted into Each Other?

Abstract

Keywords: Zirconium / Zirconium oxo cluster / Hafnium oxo cluster / Metal carboxylate / Ligand exchange 12 ] 2 is also reported for comparison. The Zr12 clusters are structurally related to the Zr6 clusters since they are composed of two Zr6 sub-units which are bridged by four carboxylate ligands. In each compound, carboxylic acid molecules interact with the cluster by hydrogen bonding to part of the µ 3 -OH ligands. The clusters are highly dynamic in solution, due to site exchange of the

Synthesis, crystal structure and thermal decomposition of Zr6O4(OH)4(CH3CH2COO)12

“…3. The molecular formula is indicative for [Zr 6 O 4 (OH) 4 (CH 3 CH 2 COO) 12 ] 2 (2xZr6), similar to the ones described by Puchberger and coworkers [17]. The unit cell contains two independent molecules.…”

Pilot-scale synthesis of a zirconium-benzenedicarboxylate UiO-66 for CO2 adsorption and catalysis

“…UiO-66 shows excellent chemical and thermal stabilities in various solvents (water, DMF, and alcohols), and strong structural resistance against mechanical pressure (>10,000 kg/cm 2 ) [14]. UiO-66 has been tested for adsorption, separation, and catalysis after various post-synthesis modifications [20][21][22][23][24][25][26]. Kim et al first reported the modification of UiO-66-Br to UiO-66-CN via microwave irradiation [26] as well as tandem functionalization with a mixed ligand UiO-66-(Br)(NH 2 ) [27].…”

First Hexanuclear UIV and ThIV Formate Complexes – Structure and Stability Range in Aqueous Solution

“…[7][8][9][10][11][12][13][14][15] Most of the described actinide(IV) complexes are hexanuclear, similar to the hexanuclear nanosized clusters of transition metal complexes. [16][17][18] These clusters have attracted an intense interest because of their important applications in materials science, especially as potential precursors, which can be applied in magnetic, electronic and catalytic processes. [19,20] Recent attempts to synthesize hexameric U complexes used predominately aprotic solvents.…”