Journal
INORGANIC CHEMISTRY
Volume 55, Issue 15, Pages 7508-7516Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.6b00818
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- Deutsche Forschungsgemeinschaft [INST 208/704-1 FUGG]
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The photophysical properties of a cationic three-coordinate copper(I) complex with a monodentate N-heterocyclic carbene ligand and a bidentate phenanthroline ligand have been investigated by employing computational chemistry methods. The absorption spectrum, calculated with the combined density functional theory and multireference configuration interaction method, matches experimentally available data perfectly, thus corroborating the validity of our applied theoretical approach. On the basis of our calculated singlettriplet gap of 650 cm(1) and the (reverse) intersystem crossing rates that are both larger than the fluorescence and phosphorescence rates at room temperature, we conclude that thermally activated delayed fluorescence should be observable for this complex in addition to phosphorescence. Torsion of the ligands has only a small impact on the singlettriplet gap. However, the electronic coupling between the S-1 and T-1 statesand hence the probability for (reverse) intersystem crossingis seen to increase substantially when moving from a coplanar to a perpendicular arrangement of the ligands.
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