POLYDIACETYLENE-INORGANIC CLAY NANOCOMPOSITES

Two new diacetylenes, 14-nmino-10,12-tetradiynoic acid (a diacetylenic aminoacid) and 10,12-docosadiyndiamine (diacetylenic diamine), were s uccessfully synthesized via Eglinton and Cadiot-Chodkiewicz coupling. These two diacetylenes and 10,12-pentacosadiynyl amine (monoamine) wer e intercalated in mica-type layered silicates, montmorillonite and ver miculite, via a cationic exchange reaction. The intercalation process was confirmed by Xray diffraction and Fourier transform infrared spect roscopy. The interlayer spacing and polymerizability of the intercalat ed diacetylene were found to depend upon the length of the diacetylene molecule the layer charge density of the clay and the solvent treatme nt. The X-ray diffraction pattern of vermiculite-diacetylene showed ev idence of the in-plane packing of the diacetylene. The polymerization of the intercalated diacetylene was confirmed by Raman spectra. (C) 19 98 John Wiley & Sons, Ltd.