Carraher, Charles E.

New organometallic containing materials were synthesized by the reaction of Group IVB metallocene dichlorides of the form Cp2MCl2 where M = Ti, Ar, and Hf with Hematoporphyrin IX using the interfacial condensation polymerization technique. The structural characterization was accomplished using infrared and mass spectroscopy and elemental analysis. The results obtained from these techniques showed the presence of the metal ester and ether bonding as evidence that the reaction occurred. The product derived from titanocene dichloride, 12-A, exhibited growth inhibition characteristics towards the Candid albicans and Staphylococcus aureus microorganisms. From the preliminary metal adsorption studies it was shown that this product also bound nickel ions.

Ethylene/vinyl alcohol (EVOH) copolymers are widely used. These copolymers have been reacted with metallic and organometallic groups for various applications. In the present work, organostannane modified EVOH copolymers are synthesized and characterized and their structure-property relationships, especially with respect to their applications as antibacterials and fungicides as well as their film forming ability, are studied. The modified copolymers exhibit "ionomer-like" thermal properties. Some of the properties of the modified EVOH products are also compared to analogous modified polyvinyl alcohol products.

Reaction of Group IVB metallocene dichlorides with a monoaza dye yields a polymer in which the metal is bonded to a sulfonic and a hydroxyl group. The structure and bonding of the polymer was confirmed using infrared, mass spectrometry and 1H-NMR spectroscopy. Thermo and elemental analysis was used to confirm the presence of the metal. The stability of the polydye to the monomer unit was compared employing an argon laser in the visible region.

Tin-containing ionomers were synthesized by reaction of poly(ethylene/acrylic acid) with mono, di and trihalo-organostannanes using the interfacial condensation technique. The products contain tin ester bonding as evidenced by infrared and mass spectroscopy. They are insoluble but form tough transparent films on application of heat and pressure. The modified ionomer products were flexible with high degrees of substitution and contained both bridging and nonbridging structures with respect to bonding about the tin atom. The analogous products from poly(acrylic acid) were brittle with lower substitutions and contained on nonbridging structure.

Organotin-modified poly(vinyl alcohol) products and titanocene-containing polyethers were synthesized via the interfacial polymerization technique. The structures were determined using infrared and mass spectroscopy. Further characterization involved elemental analysis, thermal analysis, and solubility studies. For the organotin products, the biological activities towards selected microorganisms were determined. The products exhibited selective inhibition of Candida Albicans, the microorganism most responsible for yeast infections in man. The titanocene-containing polyethers exhibited flexibility when derived from longer chained polyethylene glycols, but were inflexible when shorter chained polyethylene glycols were used.

Group IVB metallocene polymers and oligomers undergo a pi-sigma rearrangement of the cyclopentadienyl moieties in DMSO based on NMR data. The sigma-Cp rings are stereochemically rigid at room temperature.

This study reports the initial evaluation of the effect of selected chelating agents on the 123-superconductor. For the chelating agents oxalic acid and disodium oxalate, the extent and the rate of magnetic susceptibility decrease are discussed with respect to their concentration, site of chelation, exposure time and selectivity. The magnetic susceptibility measurements were carried out with a Superconductor Characterization Cryostat and the surface analysis was accomplished by employing Auger Electron Spectroscopy (AES) and X-Ray Photoelectron Spectroscopy (XPS). The results show that the solution containing oxalic acid can remove copper atoms from the superconductor surface. The extent and the rate of superconductivity decrease can be controlled by changes in concentration, addition sequence and exposure time.

One of the most common chemotherapeutic drugs in use today is cis-DDP. While this substance has been found useful in the treatment of various malignant neoplasias, it also has many adverse side effects. Recently, polymeric cis-DDP analogs have been prepared using potassium tetrachloroplatinate and various diamines. Testing of these polymeric analogs has shown that some are biologically active while others are biologically inactive. The goal of this research was to investigate the possible reasons for the differences in biological activity which had been observed. The biological activity of the diamine components, the molecular weight of the polymers, and the degradation of the polymers were examined to determine if any of these properties of the polymers could be correlated to their biological activities.

Metal containing polymers were synthesized by reaction of organotin and group IVB metallocene dichlorides with kinetin, a plant growth hormone (PGH), via the interfacial polycondensation process. Product yields were in the range of 40--63% and degrees of polymerization were from 20 to 150. The structures of the products were determined using infrared and mass spectroscopy. Further characterization involved determination of solubility, degree of polymerization and electrical conductivity. The biological potential of the products was tested against selected microorganisms and Balb/3T3 cell lines. One of the products showed activity in the 0.2mug/ml range, one hundredth of that of similar compounds. Germination experiments using the PGH incorporated polymers were performed on sawgrass and cattail seeds as well as selected vegetable seeds and compared to a control. Sawgrass germination, typically in the 0--2% range were increased to about 60% through the treatment with kinetin-containing polymers.

A new polymeric ligand, poly[5-(1,3-bis-(2'-pyridylimino) isoindolyloxy)ethylene], was synthesized. At same time, 1,3-bis-(2 '-pyridylimino)-5-hexadecanyloxyisoindoline was also synthesized. These two products were characterized with fourier transform infrared spectrometry, ultraviolet spectrometry, mass spectral analysis and elemental analysis. Their complexes of Cu+2 were prepared.