%0 Journal Article %1 Sun_2022 %A Sun, Meng-Jia %A Anhalt, Olga %A Sárosi, Menyhárt B. %A Stolte, Matthias %A Würthner, Frank %D 2022 %I Wiley %J Adv. Mater. %K myown %N 51 %P 2207331 %R 10.1002/adma.202207331 %T Activating Organic Phosphorescence via Heavy Metal-π Interaction Induced Intersystem Crossing %U https://doi.org/10.1002%2Fadma.202207331 %V 34 %X Heavy-atom-containing clusters, nanocrystals, and other semiconductors can sensitize the triplet states of their surface-bonded chromophores, but the energy loss, such as nonradiative deactivation, often prevents the synergistic light emission in their solid-state coassemblies. Cocrystallization allows new combinations of molecules with complementary properties for achieving functionalities not available in single components. Here, the cocrystal formation that employs platinum(II) acetylacetonate (Pt(acac)2) as a triplet sensitizer and electron-deficient 1,4,5,8-naphthalene diimides (NDIs) as organic phosphors is reported. The hybrid cocrystals exhibit room-temperature phosphorescence confined in the low-lying, long-lived triplet state of NDIs with photoluminescence (PL) quantum yield (ΦPL) exceeding 25% and a phosphorescence lifetime (τPh) of 156 µs. This remarkable PL property benefits from the noncovalent electronic and spin–orbital coupling between the constituents.

@article{Sun_2022, abstract = {Heavy-atom-containing clusters, nanocrystals, and other semiconductors can sensitize the triplet states of their surface-bonded chromophores, but the energy loss, such as nonradiative deactivation, often prevents the synergistic light emission in their solid-state coassemblies. Cocrystallization allows new combinations of molecules with complementary properties for achieving functionalities not available in single components. Here, the cocrystal formation that employs platinum(II) acetylacetonate (Pt(acac)2) as a triplet sensitizer and electron-deficient 1,4,5,8-naphthalene diimides (NDIs) as organic phosphors is reported. The hybrid cocrystals exhibit room-temperature phosphorescence confined in the low-lying, long-lived triplet state of NDIs with photoluminescence (PL) quantum yield (ΦPL) exceeding 25% and a phosphorescence lifetime (τPh) of 156 µs. This remarkable PL property benefits from the noncovalent electronic and spin–orbital coupling between the constituents.}, added-at = {2023-01-04T09:04:49.000+0100}, author = {Sun, Meng-Jia and Anhalt, Olga and Sárosi, Menyhárt B. and Stolte, Matthias and Würthner, Frank}, biburl = {https://www.bibsonomy.org/bibtex/29678dcd1cf418b7ae8f2dba1aa895d9e/wuerthner_group}, doi = {10.1002/adma.202207331}, interhash = {d94a27229a7653d2dd429b89ed0d4ef2}, intrahash = {9678dcd1cf418b7ae8f2dba1aa895d9e}, journal = {Adv. Mater.}, keywords = {myown}, month = nov, number = 51, pages = 2207331, publisher = {Wiley}, timestamp = {2023-05-23T12:52:53.000+0200}, title = {Activating Organic Phosphorescence via Heavy Metal-π Interaction Induced Intersystem Crossing}, url = {https://doi.org/10.1002%2Fadma.202207331}, volume = 34, year = 2022 }