Figure 3. a) TTA-UC luminescence( UCL) intensity of solid CA/DPA@PCN-222(Pd)a sf unction of increasing excitationp ower density( emission slit width 15 nm) and b) integratedUCL intensity of CA/DPA@PCN-222(Pd)asa function of the excitationpower density (l exc = 532 nm). To avoid directe xcitation of DPA, a4 95 nm long-pass filter was placed between the 532 nm laser and the CA/DPA@PCN-222(Pd) sample.
Green to blue triplet–triplet annihilation upconversion was achieved in the solid state. A mesoporous metal–organic framework with palladium porphyrin walls hosts anthracene triplet acceptors in its hydrophobic channels. This stable crystalline material shows efficient triplet–triplet annihilation upconversion in the solid state. More information can be found in the Communication by U. Resch‐Genger, K. Heinze, et al. on page 1003.
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