Polymer matrix, viii

PEI can be applied as a polymer matrix because the PEI molecules contain amino groups which are capable of bonding with group VIII metal salts. Catalytic properties of coordination compounds of PEI have been thoroughly studied [57-62] The structure or active sites of PEI complexes with nickel, cobalt, rhodium and palladium ions is presented as a five-membered chelate ring ... 

See, for example, Marshall, K. L., E. Kimball, S. Mcnamara, T. Z. Kosc, A. Trajkovska-Petkoska, and S. D. Jacobs. 2004. Electro-optical behaviour of polymer cholesteric liquid crystal flake/fluid suspensions in a microencapsulated matrix, in Liquid Crystals VIII, edited by 1. C. Khoo, SPIE Proceedings Vol. 5518 (SPIE Bellingham, WA 2004) pp. 170-181 and references therein see also, Marshall, K. L., T. Z. Kosc, S. D. Jacobs, S. M. Paris, and L. Li. 2003. Electrically switchable polymer liquid crystal and polymer birefringent flake/fluid host systems and optical devices utilizing same, U.S. Patent No. 6,665,042 B1 (Dec 2003). 

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