Abstract
Two bis–bis(urea) ligands (L1 and L2) incorporating the photoactive 9,10-diphenylanthracene fragment were designed for the construction of anion-coordination-driven assemblies and subsequent oxygenation of anthracene moieties for singlet oxygen storage. The corresponding A2L2-type sulfate complexes [TEA]4[(SO4)2(L1)2] (1) and [TEA]4[(SO4)2(L2)2] (2), where TEA = tetraethylammonium, were achieved by coordinating the ligands L1 or L2 with sulfate anions. Both 1 and 2 were able to undergo [4 + 2] photooxygenation to form endoperoxide photoproducts 1-EPO and 2-EPO, which can be partially converted back to the original anthracene compounds after heating. The structures of 1-EPO and 2-EPO were unambiguously confirmed by X-ray crystallography, NMR and UV–vis spectroscopy, and high-resolution electrospray ionization mass spectrometry.
| Original language | English |
|---|---|
| Pages (from-to) | 2198-2203 |
| Number of pages | 6 |
| Journal | Inorganic Chemistry |
| Volume | 61 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 31 Jan 2022 |