期刊
DALTON TRANSACTIONS
卷 41, 期 1, 页码 180-191出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1dt10698h
关键词
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资金
- European Union (CELLO) [STRP 248043]
- Spanish Ministry of Science and Innovation (MICINN) [MAT2007-61584, CSD2007-00010, CTQ2009-08790]
- Alexander von Humboldt Foundation
- MICINN
Herein we report a series of charged iridium complexes emitting from near-UV to red using carbene-based (NC)-C-boolean AND: ancillary ligands. Synthesis, photophysical and electrochemical properties of this series are described in detail together with X-ray crystal structures. Density Functional Theory calculations show that the emission originates from the cyclometallated main ligand, in contrast to commonly designed charged complexes using bidentate (NN)-N-boolean AND ancillary ligands, where the emission originates from the ancillary (NN)-N-boolean AND ligand. The radiative process of this series of compounds is characterized by relatively low photoluminescence quantum yields in solution that is ascribed to non-radiative deactivation of the excited state by thermally accessible metal-centered states. Despite the poor photophysical properties of this series of complexes in solution, electroluminescent emission from the bluish-green to orange region of the visible spectrum is obtained when they are used as active compounds in light-emitting electrochemical cells.
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