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Activating Organic Phosphorescence via Heavy Metal–π Interaction Induced Intersystem Crossing
Please always quote using this URN: urn:nbn:de:bvb:20-opus-312248
- 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 andHeavy‐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 (Φ\(_{PL}\)) exceeding 25% and a phosphorescence lifetime (τ\(_{Ph}\)) of 156 µs. This remarkable PL property benefits from the noncovalent electronic and spin–orbital coupling between the constituents.…
Author: | Meng‐Jia Sun, Olga Anhalt, Menyhárt B. Sárosi, Matthias Stolte, Frank WürthnerORCiDGND |
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URN: | urn:nbn:de:bvb:20-opus-312248 |
Document Type: | Journal article |
Faculties: | Fakultät für Chemie und Pharmazie / Institut für Organische Chemie |
Language: | English |
Parent Title (English): | Advanced Materials |
Year of Completion: | 2022 |
Volume: | 34 |
Issue: | 51 |
Article Number: | 2207331 |
Source: | Advanced Materials 2022, 34(51):2207331. DOI: 10.1002/adma.202207331 |
DOI: | https://doi.org/10.1002/adma.202207331 |
Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 54 Chemie / 540 Chemie und zugeordnete Wissenschaften |
Tag: | cocrystallization; naphthalene diimide; phosphorescence; platinum complexes; triplet sensitization |
Release Date: | 2023/06/30 |
Licence (German): | CC BY: Creative-Commons-Lizenz: Namensnennung 4.0 International |