Tris electron conduction

In an attempt to stabilize the highly conducting a-Agl phase at lower temperatures, various anionic and cationic substitutions have been tried. The most successftd so far has been the replacement of silver by rubidium in RbAg4l5. This material has the highest ionic conductivity at room temperature of any known crystalline substance (0.27 S cm ) with an activation energy of 0.07 eV. The electronic conductivity of RbAg4l5 is negligibly small ( 10 S cm ). 

The rate of anion diffusion can be measured in various ways. The conventional way is to use classical electrochemical methods, e.g., chronoamperometry or chronocoulome-try. The measurement of electrochemical impedance is also sometimes used. However, the electronically conducting polymers have a special property, potential-dependent absorption spectrum, which can be advantageously used to monitor the oxidation state of the polymer. In addition to the neglect of capacitive current, monitoring of the spectral change gives additional information. For instance, the presence of an isosbestic point shows that most likely... 

Mainpolymers containing tris(bipyridyl)ruthenium units have also been used in combination with electron-conducting Ti02 nanoparticles and hole-con-... 

PEO Poly(ethylene oxide) MEEP —(N=P(0C2H40C2H40CH3)2) Poly(bis-(methoxy ethoxy ethoxide) phosphazene PPO poly(propylene oxide). Dimensionality of the conduction mono-(lD), bi-(2D) or tri-(3D) dimensional. E activation energy of pj RT room temperature total conductivity electronic conductivity E band gap. 

With respect to theories of wall heterogeneous effects in hydrocarbon pyrolysis reactions, the literature is almost void. Rice and Herzfeld (1951) have presented some theoretical arguments but with some severely simplifying assumptions Polotrak, et al. (1959) proposed mechanisms involving both chain initiation and termination as heterogeneous processes. More elaborate theoretical work on the interaction between hydrocarbons (paraffins and olefins) and metal oxide surfaces was done by Semenov (1958) and Kasansky and Pariisky (1965) in which the authors tried to explain the heterogeneous effects (activity) of the surfaces in terms of electronic conductivity. 

Electronic conductivity of poly[tris(5,5 -bis[(3-acryl-l-propoxy)carbonyl]-2,2 -bi-pyridine)ruthenium(O)] was studied without any concomitant redox-exchange conduction by locking the polymer complex into a single oxidation state... 

We report here studies on a polymer fi1m which is formed by the thermal polymerization of a monomeric complex tris(5,5 -bis[(3-acrylvl-l-propoxy)carbonyll-2,2 -bipyridine)ruthenium(11) as its tosylate salt,I (4). Polymer films formed from I (poly-I) are insoluble in all solvents tested and possess extremely good chemical and electrochemical stability. Depending on the formal oxidation state of the ruthenium sites in poly-I the material can either act as a redox conductor or as an electronic (ohmic) conductor having a specific conductivity which is semiconductorlike in magnitude. 

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