Gneuss, Timo and Leitl, Markus J. and Finger, Lars H. and Yersin, Hartmut and Sundermeyer, Joerg (2015) A new class of deep-blue emitting Cu(I) compounds - effects of counter ions on the emission behavior. DALTON TRANSACTIONS, 44 (46). pp. 20045-20055. ISSN 1477-9226, 1477-9234
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Three deep blue emitting Cu(I) compounds, [Cu(PPh3)tpym]PF6, [Cu(PPh3)tpym]BF4, and [Cu(PPh3)tpym] BPh4 (tpym = tris(2-pyridyl)methane, PPh3 = triphenylphosphine) featuring the tripodally coordinating tpym and the monodentate PPh3 ligands were studied with regard to their structural and photophysical properties. The compounds only differ in their respective counter ions which have a strong impact on the emission properties of the powder samples. For example, the emission quantum yield can be significantly increased for the neat material from less than 10% to more than 40% by exchanging BPh4- with PF6-. These effects can be linked to different molecular packings which depend on the counter ion. In agreement with these results, it was found that the emission properties also strongly depend on the surrounding matrix environment which was elucidated by investigating photophysical properties of the compounds as powders, doped into a polymer matrix, and dissolved in a fluid solution, respectively. The observed differences in the emission behavior can be explained by different and pronounced distortions that occur in the excited state. These distortions are also displayed by density functional theory (DFT) calculations.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ACTIVATED DELAYED FLUORESCENCE; 3-COORDINATE COPPER(I) COMPLEXES; METAL-COMPLEXES; PHOTOPHYSICAL PROPERTIES; THEORETICAL CALCULATIONS; COORDINATION-COMPOUNDS; LUMINESCENT COMPLEXES; PHOSPHORESCENT DYES; SUBSTITUTED LIGANDS; IRIDIUM COMPLEXES; |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 26 Jul 2019 09:50 |
| Last Modified: | 26 Jul 2019 09:50 |
| URI: | https://pred.uni-regensburg.de/id/eprint/6153 |
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