Redox mechanism and electrochemical behaviour or polyaniline deposits

Optical properties of small inorganic and organic metal particles

Small inorganic rings in the 21st century: from fleeting intermediates to novel isolable entities.

Electrical conductivity of (SN)x

By the X-ray scattering measurements of TTF-TCNQ, two anomalies at q b =0.29 b * and 0.41 b * are studied, where q b is the component of the wave vectors of phonons and superstructures along the b * -axis. The anomaly at 0.29 b * appears in the TA phonon mode below 150 K and becomes the superstructure below 54 K. The anomaly at 0.41 b * appears in the LA phonon mode below room temperature and it also forms the superstructure below 54 K. It is concluded that the wave vector of the modulation of the superstructure at 0.41 b * (which is equivalent to 0.59 b * in the reduced zone scheme) is twice the wave vector of that at 0.29 b * (including the temperature dependent a * -component). Further, it was found that the wave number of the phonon anomaly at 0.41 b * varies from 0.41 b * to 0.45 b * with increasing temperature from 150 K to room temperature.

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X-Ray Scattering Study of Phonon Anomalies and Superstructures in TTF–TCNQ

Synthesis and structure of metallic polymeric sulfur nitride, (SN)x, and its precursor, disulfur dinitride, S2N2

We report the first synthesis of chemically pure polymeric sulfur nitride [${(\mathrm{SN})}_{x}$]. The optical reflectance of well-characterized films of this polymeric solid has been measured from the near ultraviolet (30 000 ${\mathrm{cm}}^{\ensuremath{-}1}$) to the far infrared (500 ${\mathrm{cm}}^{\ensuremath{-}1}$). Metallike reflectance is observed in the infrared through the visible region with a well-defined plasma minimum near 22 000 ${\mathrm{cm}}^{\ensuremath{-}1}$, corresponding to light polarized parallel to the polymer chain axis. The Drude-Lorentz model is used to analyze the data, and the physical implications of the resultant parameters are discussed.

P. J. Russo

Papers

Synthesis and structure of metallic polymeric sulfur nitride, (SN)x, and its precursor, disulfur dinitride, S2N2

Optical Reflectance of Polymeric Sulfur Nitride Films from the Ultraviolet to the Infrared