Construction of Heterometallic Cages with Tripodal Metalloligands

Abstract

Natural Science Foundation of China [20771091, 20721001]; 973 Program [2007CB815301]; Ministry of Education [NCET-06-0563

Controllable Coordination Self‐Assembly Based on Flexible Tripodal Ligands: From Finite Metallocages to Infinite Polycatenanes Step by Step

“…[37] Only a few M 3 L 2 metallocages based on the above strategy have been reported, [38][39][40] of which the two X-ray structures of [Pt 3 (L 11 ) 2 (Figure 7b,c). [38,39] So far, some M 3 L 2 -type metallocages based on flexible tripodal ligands have been synthesized, and their potential host-guest characters have also been investigated. Most M 3 L 2 -type metallocages are constructed from two-coordinated metal species and organic tripodal ligands with a single donor site, where various Ag(I) salts and other metal species protected by suitable groups, such as Zn(OAc) 2 , ZnBr 2 , and PdBr 2 , have been used as effective acceptors, while some M 3 L 2 metallocages result from metal-organic tripodal ligands with multiple donor sites.…”

“…[37][38][39][40] In 1999, the Raymond group used 4-PPh 2 -catechol and Ti(OMe) 4 (Figure 7a). [37] Only a few M 3 L 2 metallocages based on the above strategy have been reported, [38][39][40] of which the two X-ray structures of [Pt 3 (L 11 ) 2 (Figure 7b,c). [38,39] So far, some M 3 L 2 -type metallocages based on flexible tripodal ligands have been synthesized, and their potential host-guest characters have also been investigated.…”

“…In 2009, Wang and colleagues constructed M 6 L 8 metallocages based on organic-metal ligands L 12 and Pd(en)(NO 3 ) 2 ( Figure 12). [39] Then, the Batten group used ligand L 17 to prepare a series of M 6 L 8 cages based on different transition-metal ions such as Cu 21 and Fe(SCN) 2 . [46] Taking the fCu(II) 6 20 clusters are shown in red and blue, respectively.…”

[CrIII8MII6]12+ Coordination Cubes (MII=Cu, Co)

“…[8] Heterometallic coordination capsules have also been accessed using preprogrammed self-assembly approaches, occasionally using one-pot, self-sorting strategies with thermodynamically orthogonal metal-ligand motifs, [9] or more commonly through a stepwise approach that takes advantage of kinetically robust intermediate complexes that possess pendant donor tectons, often referred to as metalloligands. [10][11][12][13][14][15] However, only a handful of these heterometallic systems possess paramagnetic centers, [13] and even fewer have been reported to display intramolecular magnetic exchange. [15] Herein we discuss the structures and magnetic properties of the heterometallic cages anions.…”

Site‐Selective Ligand Exchange on a Heteroleptic TiIV Complex Towards Stepwise Multicomponent Self‐Assembly

“…[5] This Ti IV complex contains three bidentate ligands, one monoanionic acac and two dianionic catecholate ligands. Because the acac ligand appears to be more labile compared with the other two catecholate ligands, and the formation of this heteroleptic complex is not affected by the pyridyl ligand in 1 at all, both sites were expected to serve as platforms independently for a site-selective ligand exchange site with various functional ligands and a soft metal binding site, [6] respectively, to construct higher-order heteronuclear coordination molecules in a stepwise manner. In this study, we have examined the reactivity of [Ti1 2 A C H T U N G T R E N N U N G (acac)]…”