Abstract
AbstractLuminescent lanthanide complexes containing effective photosensitizers are promising materials for use in displays and sensors. The photosensitizer design strategy has been studied for developing the lanthanide-based luminophores. Herein, we demonstrate a photosensitizer design using dinuclear luminescent lanthanide complex, which exhibits thermally-assisted photosensitized emission. The lanthanide complex comprised Tb(III) ions, six tetramethylheptanedionates, and phosphine oxide bridge containing a phenanthrene frameworks. The phenanthrene ligand and Tb(III) ions are the energy donor (photosensitizer) and acceptor (emission center) parts, respectively. The energy-donating level of the ligand (lowest excited triplet (T1) level = 19,850 cm−1) is lower than the emitting level of the Tb(III) ion (5D4 level = 20,500 cm−1). The long-lived T1 state of the energy-donating ligands promoted an efficient thermally-assisted photosensitized emission of the Tb(III) acceptor (5D4 level), resulting in a pure-green colored emission with a high photosensitized emission quantum yield (73%).
Funder
MEXT | Japan Society for the Promotion of Science
MEXT | Japan Science and Technology Agency
Publisher
Springer Science and Business Media LLC
Subject
Materials Chemistry,Biochemistry,Environmental Chemistry,General Chemistry
Reference42 articles.
1. Qi, Y. et al. Recent advances in reaction-based fluorescent probes for the detection of central nervous system-related pathologies in vivo. Coord. Chem. Rev. 445, 214068 (2021).
2. Zhang, Y. X. & Qiao, J. Near-infrared emitting iridium complexes: Molecular design, photophysical properties, and related applications. iScience 24, 102858 (2021).
3. Liu, C., Yang, J.-C., Lam, J. W. Y., Feng, H.-T. & Tang, B. Z. Chiral assembly of organic luminogens with aggregation-induced emission. Chem. Sci. 13, 613 (2022).
4. Gao, C. et al. Application of triplet–triplet annihilation upconversion in organic optoelectronic devices: advances and perspectives. Adv. Mater. 33, 2100704 (2021).
5. Nakanotani, H., Tsuchiya, Y. & Adachi, C. Thermally-activated delayed fluorescence for light-emitting devices. Chem. Lett. 50, 938 (2021).
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