Metal-complex attachment

Examples of the pendant-type polymer-metal complexes represented by Schemes 4 and 5 are shown in Table 2. They are obtained by the reaction in Scheme 8 a polymer ligand is made to coordinate to a vacant site of a previously prepared, stable, low-molecular-weight metal complex. The structure and hence the functions of the metal complex are hardly changed by attachment to the polymer ligand. The metal complexes attached to the polymer ligands 1 to 8 are the classic cobaltic... 

The initial step in the reaction mechanism is formulated as an oxidative addition of the silacyclobutane to the transition-metal complex attaching Si to M (ring expansion). It is followed by a transfer of L2 from the metal to the silicon (ring opening) and polymer growth by insertion of further coordinated ring into the metal-carbon bond, similar to the mechanism proposed for olefin polymerization by Ziegler-type catalysts. 

Suzuki A, Tada M, Sasaki T, Shido T, Iwasawa Y (2002) Design of catalytic sites at oxide surfaces by metal-complex attaching and molecular imprinting techniques. J Mol Catal A Chem 182-183 125... 

Electron-Transfer Behavior of the Metal Complexes Attached to Polymer Matrices... 

It is noted that a growing number of dendrimers and hyperbranched polymers have been synthesized that have metal-metal bonded dimers or metal clusters attached to the surface of the dendrimer. These materials are analogous to polymers that have metal-metal units appended to the polymer backbone rather than incorporated into the backbone chain, and as such they are not covered in this chapter. The field was recently reviewed by Rossell and co-workers.54 The interest in these materials stems from the catalytic properties of the metal complexes attached to the dendrimer surface. In particular, these dendrimer species offer the opportunity to combine the advantages of homogeneous and heterogeneous catalysis, because the materials can be recycled by nanofiltration. 

The metal complexes attached to synthetic polymers or macromolecular metal complexes often show specific behavior in the binding reaction of small or gaseous molecules, because the reactions are affected by the polymers that surround the complex moieties [1-3]. Polymer immobilization of these metal complexes and the properties of the polymer complexes have a strong affect on the kinetic, equilibrium, and lifetime profile of the gaseous molecule-binding reactions. 

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