Photodriven Oxygen Removal via Chromophore-Mediated Singlet Oxygen Sensitization and Chemical Capture
| Autor: | Joy E. Haley, David J. Stewart, Jianmin Shi, Tod A. Grusenmeyer, Trenton R. Ensley, Ryan M. O’Donnell, William M. Shensky |
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| Rok vydání: | 2017 |
| Předmět: |
Aqueous solution
010405 organic chemistry Singlet oxygen Inorganic chemistry chemistry.chemical_element Chromophore 010402 general chemistry Photochemistry 01 natural sciences Oxygen 0104 chemical sciences Ruthenium Inorganic Chemistry chemistry.chemical_compound chemistry Physical and Theoretical Chemistry Inert gas Acetonitrile Deoxygenation |
| Zdroj: | Inorganic Chemistry. 56:9273-9280 |
| ISSN: | 1520-510X 0020-1669 |
| Popis: | We report a general, photochemical method for the rapid deoxygenation of organic solvents and aqueous solutions via visible light excitation of transition metal chromophores (TMCs) in the presence of singlet oxygen scavenging substrates. Either 2,5-dimethylfuran or an amino acid (histidine or tryptophan methyl ester) was used as the substrate in conjunction with an iridium or ruthenium TMC in toluene, acetonitrile, or water. This behavior is described for solutions with chromophore concentrations that are pertinent for both luminescence and transient absorption spectroscopies. These results consistently produce TMC lifetimes comparable to those measured using traditional inert gas sparging and freeze-pump-thaw techniques. This method has the added benefits of providing long-term stability (days to months); economical preparation due to use of inexpensive, commercially available oxygen scrubbing substrates; and negligible size and weight footprints compared to traditional methods. Furthermore, attainment of dissolved [O |
| Databáze: | OpenAIRE |
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