Metal coordination polymers chemical synthesis

Hybrid framework compounds, including both metal-organic coordination polymers and systems that contain extended inorganic connectivity (extended inorganic hybrids), have recently developed into an important new class of solid-state materials. We examine the diversity of this complex class of materials, propose a simple but systematic classification, and explore the chemical and geometrical factors that influence their formation. We also discuss the growing evidence that many hybrid frameworks tend to form under thermodynamic rather than kinetic control when the synthesis is carried out under hydrothermal conditions. Finally, we explore the potential applications of hybrid frameworks in areas such as gas separations and storage,... 

The cleavage of a P-Ph bond (method (1)) has been widely used to create a variety of phospholide salts. Notably, this methodology has been employed in the synthesis of group 13 phospholyl complexes, which have come to the fore in recent years as potential single source substrates for the preparation of the corresponding metal phosphides by chemical vapor deposition (CVD). This is exemplified by the reaction of lithium 2,5-di(tert-butyl)phospholide with GaBr to afford a Ga(l) polymer 297 (Scheme 101) <1999AGE1646>. Additionally, this synthesis nicely illustrates the use of bulky substituents in the position a to phosphorus to favor -coordination. 

The synthesis and characterization of coordination polymers was supported by the U.S. Air Force in a search for materials that exhibited high thermal stabilities. However, attempts to prepare stable, tractable coordination polymers that simulate the exceptional thermal and/or chemical stability of model monomeric coordination compounds such as copper(II) ethylenediaminobisacetylacetonate or phthalocyanine have been disappointing ". Typically, only short chains are formed, and the thermally stable monomers lose most of their stability when linked by the metals into polymeric units. The principles in designing coordination polymers are ... 

Ikeda, M., Tanabe, Y, Hasegawa, T. et al. (2006) Construction of double-stranded metaUo-supramolecular polymers with a controlled helicity by combination of salt bridges and metal coordination. Journal of the American Chemical Society, 128,6806-6807 Furusho, Y., Tanabe, Y. and Yashima, E. (2006) Double helix-to-double helix transformation, using platinum(II) acetylide complexes as surrogate linkers. Organic Letters, 8, 2583-2586 Furusho, Y. and Yashima, E. (2007) Molecular design and synthesis of artificial double helices. Chemical Record, 7, 1-11. 

The synthesis of several metallized PTASH films via coordination of the polymer to various transition metal salts followed by a chemical reduction of the resulting chelates films is described. Coordination reaction was carried out either by the mixing or the soaking method. The metallized films showed novel functions due to characteristic properties of metal chelates. The incorporation of metals improved the tensile strength as well as thermal stability of the systems as evidenced by mechanical properties and TGA measurements This improvement could be clearly demonstrated in chelates prepared by the mixing method rather than those prepared by the soaking method. Metallization of the these films has been shown by SHM, X-my diffraction and ESCA measurements which indicated the presence of the metal adhered to the surface of the films Finally, potential advantages of these metallized films lie in their versatility with which their synthesis and processability can be accomplished as well as in their stability towards humid environment. 

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