Constructing cerium supramolecular wheels and encapsulating uranium with a Schiff-base calixpyrrole ligand
作者:Polly L. Arnold、Natalie A. Potter (née Jones)、Christopher D. Carmichael、Alexandra M. Z. Slawin、Paul Roussel、Jason B. Love
DOI:10.1039/b921132b
日期:——
Trinuclear, supramolecular wheel structures are formed spontaneously from the metallation of a Schiff-base-pyrrole macrocycle by Ce3+ cations, while the related actinide U3+ cation is instead oxidised to U4+ and encapsulated.
Oxo-Functionalization and Reduction of the Uranyl Ion through Lanthanide-Element Bond Homolysis: Synthetic, Structural, and Bonding Analysis of a Series of Singly Reduced Uranyl–Rare Earth 5f<sup>1</sup>-4f<sup><i>n</i></sup> Complexes
作者:Polly L. Arnold、Emmalina Hollis、Gary S. Nichol、Jason B. Love、Jean-Christophe Griveau、Roberto Caciuffo、Nicola Magnani、Laurent Maron、Ludovic Castro、Ahmed Yahia、Samuel O. Odoh、Georg Schreckenbach
DOI:10.1021/ja308993g
日期:2013.3.13
the rare-earth complexes Ln(III)(A)3 (A = N(SiMe3)2, OC6H3Bu(t)2-2,6) via homolysis of a Ln-A bond. The complexes are dimeric through mutual uranyl exo-oxo coordination but can be cleaved to form the trimetallic, monouranyl "ate" complexes [(py)3LiOUO(μ-X)Ln(py)(L)] by the addition of lithium halides. X-ray crystallographic structural characterization of many examples reveals very similar features for
We present the extension of Pacman ligands to bidentate phosphane ligands enabling them to bind metals in their sterically protected cavity. The coordination of coinage metals shows the ability of the ligand to adopt different coordination modes by distortion, of which some additionally include the imine nitrogen atoms. Besides the coordinated metal, the substitution on the phosphorus atoms influences
Mono- and Dinuclear Macrocyclic Calcium Complexes as Platforms for Mixed-Metal Complexes and Clusters
作者:Emma A. Connolly、James W. Leeland、Jason B. Love
DOI:10.1021/acs.inorgchem.5b02289
日期:2016.1.19
Mono- and dinuclear calcium complexes of the Schiff-base macrocycles H4L have been prepared and characterized spectroscopically and crystallographically. In the formation of Ca(THF)(2)(H2L1), Ca-2(THF)(2)(mu-THF)(L-1), and Ca-2(THF)(4)(L-2), the ligand framework adopts a bowl-shaped conformation instead of the conventional wedge, Pacman-shaped structure as seen with the anthracenyl-hinged complex Ca-2(py)(5)(L-3). The mononuclear calcium complex Ca(THF)(2)(H2L1) reacts with various equivalents of LiN(SiMe3)(2) to form calcium/alkali metal clusters and dinuclear transition metal complexes when reacted subsequently with transition metal salts. The dinuclear calcium complex Ca-2(THF)(2)(mu- THF)(L-1), when reacted with various equivalents of NaOH, is shown to act as a platform for the formation of calcium/alkali metal hydroxide clusters, displaying alternate wedged and bowl-shaped conformations.
Encapsulation of a Magnesium Hydroxide Cubane by a Bowl-Shaped Polypyrrolic Schiff Base Macrocycle
作者:James W. Leeland、Fraser J. White、Jason B. Love
DOI:10.1021/ja201630b
日期:2011.5.18
Hydrolysis of a Pacman-shaped binuclear magnesium complex of a polypyrrolic Schiff base macrocycle results in the formation of a new magnesium hydroxide cubane that is encapsulated by the macrocyclic framework through both coordinative and hydrogen-bonding interactions.