Poly -metal chelates

HPMA [36] and a vinyl metal-chelating monomer A-(A/, A/ -dicarboxy-methylaminopropyl)methacrylamide synthesized [35]. Chemical structures of HPMA and DAMA are given in Figure 4. Poly(HPMA-co-DAMA) was prepared by free radical copolymerization in methanol with AIBN as initiator. Molecular weight distribution was determined by size exclusion chromatography and content of side-chain carboxylic group by acid-base titration. 

In this review, well-defined metal-containing PAEs are described whose primary structure is represented by one of the schematic drawings A-C and E shown in Fig. 2. In contrast to the structures shown in the A-C systems, E has a conjugated phenyleneethynylene with metal chelates as end groups. PAEs containing metal complex as side groups (D) have, up to now, not been described in the literature. The classes of compounds such as metal-bridged alkynes, the poly(metallayne)s, and polymer carbyne complexes (structures G and H) do not in fact represent PAEs. 

Complex compounds obtained by oxidative dissolution of elemental metals in the systems M°-ligand-solvent-HX (or halogen-substituted hydrocarbon), are represented by all types of complexes [509]. However, their ratio is not equal they are mainly molecular complexes and metal chelates the % -complexes and di(poly)-nuclear coordination compounds are not numerous. A large number of molecular (neutral and ionic) complexes, chelates, and their adducts, mostly with N-bases, are tabulated in monographs [201,202]. 

A tris(imidazolyl)borate (138) complex of thallium(I) has been synthesized.The solid-state structure of hydrotris(imidazolyl)boratothallium(I) consists of one-dimensional, twisted, ladderlike strands, and three-coordinate thallium centers. Due to the position of the nitrogen donors, the tris(imidazolyl)borate ligand is not capable of forming metal chelates as are observed in tris(pyrazolyl)borates. Poly(benzotriazolyl)borate ligands have some features of both tris(pyrazo-lyl)borate and tris(imidazolyl)borate systems. Thallium(I) complexes of bis-, tris-, and tetrakis (benzotriazolyl)borates are reported. These adducts have been synthesized by treating the corresponding potassium derivative with an equimolar quantity of thallium(I) formate. ... 

The main function of metal deactivators (MD) is to retard efficiently metal-catalyzed oxidation of polymers. Polymer contact with metals occur widely, for example, when certain fillers, reinforcements, and pigments are added to polymers, and, more importantly when polymers, such as polyolefins and PVC, are used as insulation materials for copper wires and power cables (copper is a pro-oxidant since it accelerates the decomposition of hydroperoxides to free radicals, which initiate polymer oxidation). The deactivators are normally poly functional chelating compounds with ligands containing atoms like N, O, S, and P (e.g., see Table 1, AOs 33 and 34) that can chelate with metals and decrease their catalytic activity. Depending on their chemical structures, many metal deactivators also function by other antioxidant mechanisms, e.g., AO 33 contains the hindered phenol moiety and would also function as CB-D antioxidants. 

POLY AMINE-CHELATED ALKALI METAL COMPOUNDS... 

Liquid Chromatography Stationary phase Amino Acid Derivatives Low-Mass Synthetic Selectors Poly(saccharide) Derivatives Cyclodextrin Derivatives Glycopeptides Metal Chelates Proteins Helical Polymers... 

Thin-Layer Chromatography Stationary phase Metal Chelates Poly(saccharide) Derivatives... 

Capillary Electrophoresis Mobile phase Cyclodextrin Derivatives Chiral Surfactants (MEKC) Poly(saccharides) Glycopeptides Proteins Metal Chelates... 

Armisen P., Mateo C., Cortes E., Barredo J.L., Salto F., Diez B., Rodes L., Garcia J.L., Fernandez-Lafuente R. and Guisan J.M. 1999. Selective adsorption of poly-His tagged glu-taryl acylase on tailor-made metal chelate supports, J. Chromatogr. A, 848, 61. 

Preparation and Characterization of Metallized Polymer Films Formed from Poly[4- tereph-thaloylamino) salicylic acid hydrazide]-Metal Chelates... 

Stoddart et al. also reported poly (bis [2]catenane) 41 based on a transition metal chelation effect (Scheme 17.13) [98]. In this case, bis[2]catenane monomer 40, prepared using the same template-directed strategy as described above [99], was mixed with CF3 SO3 Ag in acetonitrile at room temperature, and poly(bis[2]catenane) 41 was obtained after counterion exchange. GPC analysis with protein standards indicated the M of 41 to be 150 kDa, corresponding to a DP of 40. 

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