Details

Autor(en) / Beteiligte

• Marcot, Laurence
• Maldivi, Pascale
• Marchon, Jean-Claude
• Guillon, Daniel
• Ibn-Elhaj, Mohammed
• Broer, Dirk J
• Mol, Grietje N

Titel

Metallopolymers:  Preparation of Polymer Films with a High Content of Metal Centers via Photopolymerization of Metal-Containing Liquid-Crystalline Monomers

Ist Teil von

• Chemistry of materials, 1997-10, Vol.9 (10), p.2051-2058

Ort / Verlag

Washington, DC: American Chemical Society

Erscheinungsjahr

1997

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The photoinitiated polymerization of several metal-containing liquid crystals is described. Four metal carboxylates bearing terminal acrylate functions were investigated as monomeric units:  a copper(II) complex derived from an aliphatic carboxylate, of formula Cu2(O2C−(CH2)11−Acr)4, (Acr = −OCO−CHCH2), a zinc(II) complex with the 3,4-bis(11-acryloyloxyundecanoxy)benzoate ligand, of formula Zn(O2CC6H3(O−(CH2)11−Acr)2)2 and two magnesium(II) carboxylates, one derived from an aliphatic carboxylate, Mg(O2C−(CH2)11−Acr)2, and one from the disubstituted benzoate, Mg(O2CC6H3(O−(CH2)11−Acr)2)2. These compounds were shown, by DSC and X-ray diffraction studies, to exhibit a hexagonal columnar mesophase at room temperature. The photopolymerization of the Zn(II) and Mg(II) derivatives, either in the liquid-crystalline phase or in the isotropic phase, was performed with high final conversion, from 50 to 80%, depending on the compound and on the temperature, whereas the copper complex was found unreactive toward the polymerization process. Thin films of the polymer prepared with the Zn(II) monomer were characterized by infrared spectroscopy and elemental analysis. The data indicate that at least 80% of the coordinating sites included in the polymer matrix are bonded to metal centers, resulting in a polymer with a high zinc content (ca. 5% wt/wt).