| DEVELOPMENT |
"TAML activators have been developed around a different design concept compared to what nature uses in producing enzymes," "Nature designs around the big idea that any desired reaction can be sped up in the presence of myriad simultaneously occurring reactions. In contrast, we have followed the central design concept that reactions we do not want to occur in an oxidation process can be slowed down without suppressing the rate of the targeted reactions. After 20 years of catalyst design work, we are learning that this approach has considerable merit for solving problems in green oxidation chemistry." |
| ECOLOGY |
Author REPORTED that his group has most recently used TAML activators for the rapid total destruction of chlorophenols. Chlorophenols, which are recognized by EPA as persistent environmental pollutants. Less than 10 µM of a TAML iron activator can promote 0.5 M H2O2 to degrade millimolar aqueous solutions of pentachlorophenol or 2,4,6-trichlorophenol to nonhazardous products. The process, which takes about 10 minutes under ambient conditions, converts nearly 99% of the chlorophenols to a mixture of CO, CO2, and HCl along with biodegradable chlorinated and nonchlorinated C1 to C4 organic acids. After further treatment, most of the remaining small chlorinated organics are degraded and no measurable amounts of dioxins are observed. |
| OBSERVATION'S | TAML activators are water soluble, and different examples allow access to a broad pH range [1 to 13]," "The activators are relatively easy to synthesize, and they function well in nanomolar to low-micromolar concentrations." The activators can be readily modified to achieve a desired selectivity, he added, and for most applications minimal capital costs will be needed for their implementation. Initial lab tests indicate that the TAML activators have low toxicity, but complete toxicology studies to check environmental persistence and bioaccumulation are still needed. |
| UPDATE | 05.02 |
| USES |
ChloroPhenols are found in - Personal care products. - Pesticides - Wood preservatives - Wood pulp bleaching by-prodt. |
| AUTHOR | This data is not available for free |
| LITERATURE REF. | This data is not available for free |
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