AI Article Synopsis
- A cyclometalated platinum(II) complex has been successfully integrated into the modified channels of SBA-15, a type of ordered mesoporous silica known for its large hexagonal pores.
- The research shows that the olefins inside these nanoporous channels can produce singlet oxygen ((1)O(2)) up to eight times more efficiently compared to when they are in a regular solution.
- The platinum(II) complex remains stable through multiple uses, demonstrating effective photosensitized oxidation with minimal degradation, making this system an efficient option for photochemical reactions in mesoporous silica.
Article Abstract
Cyclometalated platinum(II) complex has been successfully incorporated into the (3-aminopropyl) triethoxysilane-modified channels of ordered mesoporous silica SBA-15 that has large pore hexagonal channels. Studies on the (1)O(2) generation conclusively demonstrates that the olefins in the nano-channels of SBA-15 can be enriched 8 times higher than those in the homogeneous solution as the diffusion quantum yield of singlet oxygen ((1)O(2)) is assumed to be unit. The platinum(II) complex loaded in the channel of SBA-15 is stable, and the photosensitized oxidation occurs efficiently. No obvious degradation and leaching of photosensitizers is observed even after 10 runs. Only a simple filtration is needed for the recycled use of the expensive noble metal catalysts. This versatile system is a good example of photochemical reactions occurring in the mesoporous silica molecular sieve. SBA-15 not only provides a support for the photosensitizer, but also acts as a nano-reactor to facilitate the photooxidation.
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| http://dx.doi.org/10.1021/ja0648256 | DOI Listing |
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