Water-soluble polyferrocenylsilanes

Water-Soluble Polyferrocenylsilanes Layer-by-Layer Assembly Applications... 

Water-soluble organic polymers are of considerable commercial importance, whereas few examples of water-soluble metal-containing polymers have been reported. Both cationic and anionic water-soluble polyferrocenylsilanes have been prepared by a variety of different synthetic methodologies [132-138]. These materials are of potential interest as electrode materials and as redox-active polymeric electrolytes, the ionic conductivity of which might be tuned by oxidation of the iron centers. Based on the potential formation of micellar aggregates, these materials may also prove useful as redox-active encapsulation agents [139]. Furthermore, various water-soluble ferrocenium salts have been shown to display anti-cancer activity [140]. 

Water-Soluble Polyferrocenylsilanes for Supramolecular Assemblies by Layer-by-Layer Deposition... 

Water-soluble polyferrocenylsilane polycations, belonging to the rare class of main chain organometallic polyelectrolytes, have been reported by us and others. "" These compounds are of interest because they combine the unusual properties of polyferrocenylsilanes with the processability of polyelectrolyte solutions, for example, enabling one to make use of ionic interactions to deposit these polymers onto substrates. Polyelectrolytes can be employed in layer-by-layer (LbL) self-assembly processes to form ultrathin multilayer films with controlled thickness and composition. ... 

Polyanion 7 is, to our knowledge, the first reported organometallic polyanion. The material is highly water soluble it could be dissolved to concentrations exceeding 100 mg/mL. It must be noted that the solubility of the polyanion, which is a weak polyelectrolyte, decreases below pH 6 In conclusion, a universal route to functionalized polyferrocenylsilanes, using nucleophilic substitution reactions, enabled us to produce water-soluble polyferrocenylsilane polycations and polyanions. 

Wang Z, Masson G, Peiris PC et al. (2007) Living photolytic ring-opening polymerization of amino-functionalizEd [l]ferrocenophanes synthesis and layer-by-layer self-assembly of weU-deflned water-soluble polyferrocenylsilane polyelectrolytes. Chem -A Eur J 13 9372-9383... 

A typical water-soluble PFS polyelectrolyte, the cationic polyferrocenylsilane 3.50, can be prepared by thermal ROP of monomer 3.49 followed by quatemiza-tion of the resulting polymer with Me2S04 (Eq. 3.21) [133]. 

Water-soluble cationic and anionic polyferrocenylsilane polyelectrolytes 475... 

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