Silver coordination polymers

SILVER COORDINATION POLYMERS WITH SPECIFIC TOPOLOGY... 

In addition to the infinite tubes, polycatenanes, and polyrotaxanes, all of which are polymeric complexes, a great number of silver coordination polymers with ID, 2D and 3D framework structures have been reported more recently. Selected examples and their specific topologies of some of these are listed in Table 11.1. Schematic structures of the corresponding organic ligands are shown in Figure 11.23.9,58-75... 

TABLE 11.1. Selected Silver Coordination Polymers with Specific Topology... 

The ligand (25) (Scheme 22) consists, in the solid state, of discrete molecules without significant intermolecular association. Within each HC(pz)3 unit the orientation of the three pyrazolyl ring is a propeller arrangement. This ligand supports the supramolecular architecture of a silver coordination polymer.258... 

Gordon O, Vig Slenters T, Brunetto PS, VUlaruz AE, Sturdevant DE, Otto M, et al. Silver coordination polymers for prevention of implant infection thiol interaction, impact on respiratory chain enzymes, and hydroxyl radical induction. Antimicrob Agents Chemother 2010 54 4208-18. 

Ag B(im)4 ] have also been reported.388, 89 The structure of the [hydrotris(l,2,4-triazolyl)borato]-silver(I) consist of a 2D coordination polymer (30).390... 

Hardie et al. have utilized the coordination strategy for constructing coordination polymers by mixing silver carborane salts Ag(CBuH12) (165) or Ag[Co(C2B9Hn)2]... 

Figure 87 The silver carborane salts Ag(CBnH12) (165) and AgfCo BpHu ] (166), and the nitrile ligands (167,168,169, and 170) utilized in the construction of coordination polymers. (Adapted from ref. 166.)...

The placement of four pyridyl groups on the upper rim of the resorcin[4]arene cavitands was followed by the addition of Pd(II) ions to generate a monomeric molecular receptor with hydrophobic binding sites <00TL3113>. The treatment of 2,4,6-rm[(4-pydrinyl)methyl-sulfanyl]-l,3,5-triazene (tpst) with silver to form a single-stranded one-dimensional coordination polymer, [Ag7(tpst)(C104)2(N03)5(dmf)2] , which contains nanotubes... 

Lahn B, Rehahn M. Coordination polymers from kinetically labile copper(I) and silver(I) complexes true macromolecules or solution aggregates Macromol Symp 2001 163 157-176. 

Bis-Azolylazine Derivatives as Supramolecular Synthons for Copper and Silver [2 x 2] Grids and Coordination Polymers... 

Pan, L., Woodlock, B., Wang, X., Lam, K.C., Rheingold, A. L., Novel silver -Organic Coordination Polymers conversion of extended structures in the solid state as driven by argentophilic interactions. Chem. Commun. 2001, 1762-1763. 

Luminescent copper- and silver-containing coordination polymers were prepared by Harvey and collaborators using 1,8-diisocyano-p-menthane (dmb) as the coordinating unit.29,30 This aliphatic diisonitrile ligand can adopt two conformations as depicted in Figure 6. 

Most silver acetylides are highly insoluble in standard organic solvents because of the formation of coordination polymers, and this characteristic can cause difficulties with characterization and limit reactivity. This can be overcome by the addition of coordinating donor molecules such as triphenylphosphine that perturb the formation of the polymeric structure.91 In the experience of the authors, however, the addition of such ligands can decrease reactivity. 

Polyrotaxanes can also be formed through interlocking coordination polymers, a typical example of which has been reported by Robson and coworkers.57 1,4-Bis (imidazol-l-yl-methyl)benzene (13) (Fig. 11.20b) coordinates with silver to give ID polymeric chains that are further knitted together to provide a 2D polyrotaxane (Fig. 11.22). 

Figure 11.23. Structures of organic ligands 14—35 used for construction of the silver(I) coordination polymers listed in Table 11.1.

A vast range of coordination polymers or supramolecular architectures with different dimensionalities - 1-D, 2-D and 3-D - have been discovered in recent years. Fig. 4 illustrates an example of a 1-D chain system involving Ag-N bonding through a linear 4,4 -bipyridyl group.13 Since the linkage through the silver is also linear, the chain, itself, is too. By... 

Fig. 4 A linear coordination polymer of silver with 4,4 -bipyridyl and bidentate nitrite anions,13 There is a 3.0 A contact between the silver and the nitrogen of the nitrite ion, shown as a dotted line, if this was a full covalent bond, the system would be two-dimensional. Gray spheres denote carbon, white hydrogen, dark blue nitrogen, red oxygen, and green silver.

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