Copper complexes sheets

The treatment of LB films of copper behenate (10-50 layers) with H2S gas resulted in formation of the semiconductor CU2S [177]. In this case, the LB films of behenic acid alone were formed and then exposed to solutions of copper chloride. Conversion of the carboxyl groups to carboxylate groups upon copper complexation was confirmed by infrared spectroscopy. Resistivity measurements versus temperature confirmed the formation of semiconducting CU2S in one case, and showed a linear increase in log(R) versus IT K). All of the samples became insulators on exposure to air maintaining the conductivity required storage under vacuum. The formation of CuiS sheets in some of the sample was concluded from optical microscopy and resistivity data. 

For strength properties, it was found that (Table 7.19] using carboxymethyl cellulose-copper complexes [CMC-Cu(II)] as paper additive enhanced the strength properties of wood pulp-paper sheet, and depended on the anion of the copper salt used and the pH value during the preparation process. The best polymer complex was that produced from using copper sulfate as the origin of copper ion at pH 5.4. 

Table 7.21 Thermal degradation measurements of copper complex-containing paper sheets in comparison to wood pulp sheet (main degradation stage)...

Table 7.22 IR measurements of copper complexes-contalnlng paper sheets...

Table 7.23 Antimicrobial action of copper complexes containing paper sheets on some microorganisns...

Table 7.24 Magnetic behavior of copper complexes and magnetic filler-containing paper sheets...

Fig. 12. Complex copper ore concentration flow sheet. Courtesy of Denver Equipment Co.

Salts of neodecanoic acid have been used in the preparation of supported catalysts, such as silver neodecanoate for the preparation of ethylene oxide catalysts (119), and the nickel soap in the preparation of a hydrogenation catalyst (120). Metal neodecanoates, such as magnesium, lead, calcium, and zinc, are used to improve the adherence of plasticized poly(vinyl butyral) sheet to safety glass in car windshields (121). Platinum complexes using neodecanoic acid have been studied for antitumor activity (122). Neodecanoic acid and its esters are used in cosmetics as emoUients, emulsifiers, and solubilizers (77,123,124). Zinc or copper salts of neoacids are used as preservatives for wood (125). 

Dithiocarbamate complexes of copper have been sythesized at a high rate. Reports of new complexes include the morpholine-4- (44), thio-morpholine, AT-methylpiperazine-4-, and piperidine- (291) dithiocarba-mates. Novel, polymeric complexes of the type Cu(pipdtc)2 (CuBr) in = 4, or 6) and Cu(pipdtc)2 (CuCl)4 have been prepared by reactions of[Cu(pipdtc)2] with the respective copper halide in CHCla-EtOH (418). The crystal structures of the polymers are known to consist of sheets of individual [Cu(pipdtc)2] molecules linked to polymeric CuBr chains via Cu-S bonds. A series of copper(I) dtc complexes have been the subject of a Cu and Cu NQR-spectral study (440). 

The same type of Au- -N interaction between adjacent [Au(CN)4] anions is found in [Cu(dien)][Au(CN)4]2 and [Cu(en)2][Au(CN)4]2 (dien = diethylenetriamine en = ethylenediamine) [48], although in these examples the copper cations act as bridges between neighboring chains generating 2-D sheets, as shown in Figure 5.26. The Au- -N separations, of 3.001 and 3.137 A in the triamine complex and 3.035(8) A in the diamine one are similar to those in other tetracyanoaurate(III) derivatives. Additional weak hydrogen bonds between amino hydrogen and N(cyano) atoms increase the dimensionality of the supramolecular structure. 

NEtH3 and NPhH3) are isomorphous with the corresponding copper(II) complexes, which are known to have chloride-bridged sheets intercalated with the organic cations. 

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