Precursors to three new 3,4-ethylenedioxythiophene (EDOT) incorportaing dyes have been synthesisedviaa one-pot C–H activation route usingN,N-dimethylaniline as a donor group.

One of the most pollutants of water is organic dyes, which is usually come from industries of textile, leather and paper. In this work, activated carbon is used as adsorbent, which is prepared from the corn-cob (CCAC) to remove the methyl violet (MV) dye from prepared aqueous solutions. The amount of adsorption dyes were investigated by including the effect of different parameters such as, the agented time, initial dye MV concentration (10-50 g.L -1 ), effect of pH (3,6,8,10 and 12), temperature (288,308,328) K and adsorbent dosage (0.01-0.1g). The percentage of removal of MV by the CCAC is increased significantly with increasing the amount of the adsorbent and the solution pH, and the maximum was at pH 11.5, but its decreased with increasing the temperature and initial concentration of the dye. The two adsorption isotherm models (Langmuir and Freundlich) were used to investigate the interaction between the dye and prepared activated carbon, while the adsorption equilibrium data were best represented by the Freundlich detect the type of adsorption, which implies that the adsorption of textile dye onto the (CCAC) is heterogeneous with multilayers.

Dye-sensitized solar cells (DSSCs) continue to attract interest due to their lower cost production compared to silicon based solar cells and their improving power conversion efficiencies. Porphyrin-based sensitizers have become an important sub-class due to their strong absorption characteristics in the visible region, convenient modulation of properties through synthetic manipulation and class-leading power conversion efficiencies. In this article, we report the synthesis and characterization of two porphyrin-based dyes and their application as sensitizers in DSSCs. A thiophene and a furan moiety have been incorporated into the push-pull architecture as a π-bridge, allowing the systematic investigation of how these moieties influence the physical properties of the dyes and the performance of their resulting DSSCs. A significant difference in PCEs has been observed, with the furan containing dye (PorF, PCE = 4.5%) being more efficient than the thiophene-based analogue (PorT, PCE = 3.6%) in conjunction with the iodide/triiodide redox electrolyte.