Shafikov, Marsel Z. and Czerwieniec, Rafal and Yersin, Hartmut (2019) Ag(i) complex design affording intense phosphorescence with a landmark lifetime of over 100 milliseconds. DALTON TRANSACTIONS, 48 (8). pp. 2802-2806. ISSN 1477-9226, 1477-9234
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A highly emissive Ag( I) complex comprising 2,9- dimethyl- 1,10- phenanthroline ( dmp) and bis[( 2- diphenylphosphino) phenyl] ether ( dpep) ligands was synthesized, characterized and investigated for its photophysical properties both experimentally and theoretically. The material exhibits intense phosphorescence from the triplet state of ligand centered ( 3LC) character featuring an unprecedented long lifetime of t = 110 ms and a quantum yield of FPL = 50%, as measured for a doped PMMA matrix under ambient conditions. This is an efficient yet exceptionally slow emission decay, breaking the previous record by several orders of magnitude. Such properties are attributed to two factors: ( i) the Ag( I) ion introduces weak spinorbit coupling and efficient population of the emitting triplet state; ( ii) the rigid molecular design combined with a matrix- based rigidity largely suppresses non- radiative relaxations.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | DELAYED FLUORESCENCE; EXCITED-STATES; BASIS-SETS; PHOTOPHYSICS; DYNAMICS; OXYGEN; LIGAND; PHOTOCHEMISTRY; PLATINUM(II); EMISSION; |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie > Chair of Chemistry III - Physical Chemistry (Molecular Spectroscopy and Photochemistry) > Prof. Dr. Hartmut Yersin |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 21 Apr 2020 10:26 |
| Last Modified: | 21 Apr 2020 10:26 |
| URI: | https://pred.uni-regensburg.de/id/eprint/27516 |
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