AI Article Synopsis
- - Scientists discovered a molecular system with an exceptionally long-lived triplet excited state lasting 93 ms at room temperature, using a compact tridecafullerene structure for potential applications in nonlinear optics and biomedicine.
- - They synthesized and characterized three versions of tridecafullerenes that differ in glycodendron types and spacer units, observing their aggregation in water through UV/Vis spectra and DLS experiments.
- - The research found varying levels of inner solvation based on molecular design and demonstrated that triplet states were efficiently quenched by molecular oxygen, but not by azide anions in water; molecular modeling revealed differences in how water interacts with these structures.
Article Abstract
Suitably engineered molecular systems exhibiting triplet excited states with very long lifetimes are important for high-end applications in nonlinear optics, photocatalysis, or biomedicine. We report the finding of an ultra-long-lived triplet state with a mean lifetime of 93 ms in an aqueous phase at room temperature, measured for a globular tridecafullerene with a highly compact glycodendrimeric structure. A series of three tridecafullerenes bearing different glycodendrons and spacers to the C units have been synthesized and characterized. UV/Vis spectra and DLS experiments confirm their aggregation in water. Steady-state and time-resolved fluorescence experiments suggest a different degree of inner solvation of the multifullerenes depending on their molecular design. Efficient quenching of the triplet states by O but not by waterborne azide anions has been observed. Molecular modelling reveals dissimilar access of the aqueous phase to the internal structure of the tridecafullerenes, differently shielded by the glycodendrimeric shell.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8361972 | PMC |
| http://dx.doi.org/10.1002/anie.202104223 | DOI Listing |
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