China
Africa
Explore chapters and articles related to this topic
Design and Photocatalytic Properties of Semiconductor/Dye/Polymer thin Film Photocatalysts
Published in Omari V. Mukbaniani, Marc J. M. Abadie, Tamara N. Tatrishvili, Chemical Engineering of Polymers, 2017
O. Linnik, O. Nadtoka, N. Chorna, N. Smirnova, V. Syromyatnikov
Acid catalyzed silica sols were obtained using tetraethoxysilane Si(OC2H5)4, aqueous solution of hydrochloric acid (used as a catalyst), de-ionized water for hydrolysis, and commercially available triblock copolymer polyethylene oxide – polypropylene oxide PluronixP123(BASF)(as template). To control hydrolysis-condensation reaction rates and to prevent oxides precipitation, acetylacetone was used as a complexing agent. Silica-titania films (10 and 30 wt% TiO2) were prepared via addition of TiO2 in anatase crystalline form (6–7 nm, Figure 28.2)[21] to SiO2 sol. Dip-coating procedure was used for film formation on the clean and dried glass substrates (withdrawal rate was 1.5mm/s). Thermal treatment of films was performed at 350°C. Acridine Yellow (AY) dye (1x10– 6mol/L) was left for adsorption onto the films for 24 hours. After drying on the air, the polymer (5% PEPC in benzene) was twice covered onto the films with adsorbed AY. The composites were left for 48 hours at room temperature.
List of Chemical Substances
Published in T.S.S. Dikshith, and Safety, 2016
Acetylacetone (2,4-pentanedione) is a clear or slightly yellowish liquid with a putrid odor. It is readily soluble in water. It is with other incompatible materials, light, ignition sources, excess heat, oxidizing agents, strong reducing agents, and strong bases. On decomposition, acetylacetone releases hazardous products, such as carbon monoxide, irritating and toxic fumes and gases, and carbon dioxide. Acetylacetone is used in the production of anticorrosion agents and its peroxide compounds for the radical initiator application for polymerization. It is used as a chemical intermediate for drugs (such as sulfamethazine, nicarbazine, vitamin B6, and vitamin K), sulfonylurea herbicides, and pesticides. It is used as a solvent for cellulose acetate, as an additive in gasoline and lubricant, as a dryer of paint and varnish. It is used as an indicator for the complexo-metric titration of Fe(III), for the modification of guanidino groups and amino groups in proteins, and in the preparation of metal acetylacetonates for catalyst application.
Nonaqueous Redox Flow Batteries
Published in Huamin Zhang, Huamin Zhang, Xianfeng Li, Jiujun Zhang, Redox Flow Batteries, 2017
The complexes with acetylacetonate ligands are known for various metal centers, including U, Ru, V, Cr, and Mn. A nonaqueous RFB using uranium β-diketonate complexes in polar aprotic solvents was investigated by Yamamura et al. [14]. An OCP was calculated to be approximately 1 V by using a U(VI)/U(V) β-diketonate solution as the positive electrolyte and a U(IV)/U(III) β-diketonate solution as the negative electrolyte. It is expected that ligands with higher basicity will expand the OCP. The solubilities of the uranium β-diketonates in polar aprotic solvents (e.g., ACN, PC) were measured, and solubilities of more than 0.8 M for U(VI) complexes and more than 0.4 M for U(IV) complexes were obtained.
Inverse coordination complexes. Carbon monoxide, carbon dioxide, carbonate, acyclic polyolato anions, neutral polyols and polyethers as centroligands. Topologies and systematization
Published in Journal of Coordination Chemistry, 2023
Di(acetylacetone) (i.e. tetraacetylethane) is a versatile centroligand and forms diconnective inverse coordination complexes with several transition metals. The first examples include a ruthenium compound (320) [361] and a couple of cobalt inverse coordination complexes (321) [362], (322) [363] (Scheme 87). Surprisingly, no more complexes of groups 8 and 9 were reported.