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Instead a set of bands at 1320, 1342, and 1360 c m - were observed. The bands at -1022, 1067, 1179, 1490, and 1597 cm" for supported P-naphthyl species are shifted to 1016 and 1015, 1059 and 1054, 1160 and 1154, 1500 and 1474, 1578 and 1576 c m for samples treated with P b and H g , respectively. Such changes in the infrared spectra are consistent with literature data (19,20,21,22,23,24) concerning formation of heavy metal complexes of diphenylthiocarbazone and di-P-naphthylthiocarbazone. Since there are no data in the literature concerning oxidation of polymer-supported diarylthiocarbazides to the corresponding diarylthiocarbazones, it was necessary to find suitable conditions for these oxidations.

Oxidation with dilute hydrogen peroxide produced an almost black solid. The infrared spectra exhibited changes in die 1000-1340 c m region with domination of a band around 1152 c m . Presently available methods do not allow a quantitative comparison of supported diarylthiocarbazones obtained by different oxidation methods . Therefore these products were tested in reactions with heavy metals ( P b and H g ) . 005 M Pb -* and H g . There were changes in the infrared spectra of such samples treated with heavy metals similar to those discussed above.

Ache, A n Optochemical Sensor for Cd(II) and Hg(II) Based on a Porphyrin Immobilized on Nafion® Membranes, Sensors and Actuators B, 1993, 13-14, 424-426. 7. G . Frishman, G . Gabor, Surface Characteristics of Optical Chemical Sensors, Sensors and Actuators B, 1994, 17, 227-232. 8. R. E . Buckles, M. P. Bellis, o-Nitrocinnamaldehyde, Organic Syntheses, C o l l . vol. 722. 9. R. B . King, E . M. Sweet, Polymer-Anchored Cobalt (II) Tetraarylporphyrin Catalysts for the Conversion of Quadricyclane to Norbornadiene in a Solar Energy Storage System, J.

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