Constructing [CoII6] hexagon-centered heterometallic {Ln₆Co₆} (Ln = Y, Eu and Dy) clusters with a calix[8]arene ligand

Abstract

Three isostructural 3d-4f polynuclear clusters {(LnIII6CoII6)(C8A)3} (Ln= Y(CIAC-248), Eu(CIAC-249), Dy(CIAC-250); C8A = p-tert-butylcalix[8]arene) were synthesized under solvothermal conditions. These three compounds are featured with some tripod-like entities in which threeLn2-C8A...

Construction of zirconium/hafnium-oxo clusters based on a new protection-calix[8]arene

“…24,25 Several conformations of TBC [8] have been observed in the transition metal (TM) or lanthanide metal complexes based on TBC [8], including pleated-loop, double-cone, and inverted double-cone. 20,21,[26][27][28] In particular, TBC [8] that adopts the double-cone conformation can form the Ln 2 -TBC [8] subunit upon reaction with Ln 3+ ions. 29 However, we do not know the conformation in which TBC [8] combines with Zr 4+ (Hf 4+ ) to form the hierarchical structure.…”

“…17 Based on the multiple hydroxyl groups of TBC [8], Dalgarno, Liao and other groups have reported a series of MOCs, including Gd 8 , Pr 10 , Ln 6 Cr, Ln 6 Co 6 and Pb 12 . [18][19][20][21][22] In addition, bulky calixarenes provide a rigid shell to protect the metal core, and the continuous carbon backbone structure can increase the stability of the clusters. 17,23 However, calixarene-protected ZrOCs (HfOCs) are rare, and the crystal structure of calix [8]arene-based ZrOCs (HfOCs) has not been reported.…”

Two-Dimensional Metal Azides Constructed by a Ln@Co6Cluster and Disordered Co3(N3)11Units

“…In recent years, molecule-based magnetic materials have attracted extensive attention due to their important properties and potential application prospects. − Among them, the 3d–4f heterometallic complexes exhibit various structures and excellent magnetic properties which are significant in both crystal engineering and magnetism investigations. − Many 3d–4f complexes with finite nuclear clusters and infinite structure chains, layers, and networks have been synthesized with different strategies. ,,− In the high-nuclear clusters or coordination polymers, it is found that some 3d–4f clusters have small nuclearity as building blocks, which are connected to each other through the 4f ions. ,− However, the connections that are not conducive to transfer magnetic interactions for 4f electrons are inner shell electrons and are not coupled effectively with other spin carriers . To avoid the above problems, small 3d–4f clusters should be connected by a “magnetic bridge” through the 3d ions.…”

Icosahedron [Cl12]12- Templated Gigantic Gd158Co38 Nanocluster with the Largest Ln158 Core for Magnetic Cooling

“…Relative to the extensive research on the synthesis and properties of Ni-Ln, other high-nuclearity 3d-Ln clusters are less studied, owing to the di culty of synthesis [38][39] . Co ions with the high spin ground state and excellent catalysis have been widely studied [40][41][42][43][44] It is worth noting that a large series of CO 3 2− anions as important templates and linkers among metal ions, deriving from the decomposition of organic ligands, exhibit a rich variety of coordination modes (Fig. S3), re ecting the complexity of the nanocluster structure, and the adaptability of the anion templates.…”