Chemistry can be defined as the study of matter and the changes it undergoes. You¡¯ll sometimes hear it called the central science because it is the connection between physics and all the other sciences, starting with biology. 455-13-0, Name is 4-Iodobenzotrifluoride, molecular formula is , belongs to iodides-buliding-blocks compound. In a document, author is Clifford, John N., Category: iodides-buliding-blocks.
Dye dependent regeneration dynamics in dye sensitized nanocrystalline solar cells: Evidence for the formation of a ruthenium bipyridyl cation/iodide intermediate
We report a transient absorption study of the kinetics of re-reduction of ruthenium bipyridyl dye cations adsorbed to nanocrystalline TiO2 films by iodide ions, employing a series of Ru-II(dcbpy)(2)X dyes, where dcpby = 4,4′-dicarboxy-2,2′-bipyridyl and X = (NCS)(2), (CN)(2), DTC (diethyldithiocarbamate), and Cl-2. The data indicate that this re-reduction (or ‘regeneration’) reaction proceeds via a transient (dye(+)-iodide) intermediate complex formed by reaction of photogenerated dye cations with one iodide ion. The subsequent reaction of this complex with a second iodide ion, forming I-2(-), is shown to be the kinetically and thermodynamically limiting step in the overall regeneration reaction. The implications of this reaction scheme for the function of dye sensitized photoelectrochemical cells are discussed, considering in particular the high photovoltaic efficiencies obtained for such devices employing such ruthenium bipyridyl senstiser dyes in combination with iodide/tri-iodide based redox electrolytes.
Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data. If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 455-13-0, in my other articles. Category: iodides-buliding-blocks.