TY  - JOUR
A1  - Sun, Meng‐Jia
A1  - Anhalt, Olga
A1  - Sárosi, Menyhárt B.
A1  - Stolte, Matthias
A1  - Würthner, Frank
T1  - Activating Organic Phosphorescence via Heavy Metal–π Interaction Induced Intersystem Crossing
JF  - Advanced Materials
N2  - 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 (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.
KW  - cocrystallization
KW  - naphthalene diimide
KW  - phosphorescence
KW  - platinum complexes
KW  - triplet sensitization
Y1  - 2022
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-312248
VL  - 34
IS  - 51
ER  -