Abstract
Transition metal complexes with metal-to-ligand charge transfer (MLCT) excited state have been extensively reported because they found applications in many different areas. Previously, we have designed readily tunable luminescent rhenium(I) diimine luminophores with isocyanide ligands. Our spectroscopic study has revealed that these isocyano rhenium(I) diimine complexes exhibit both MLCT [dπ(Re) → π*(CNR)] and [dπ(Re) →π*(diimine)] transitions. As MLCT [dπ(Re)→π*(CNR)] states are believed to be higher energy than those of the MLCT [dπ(Re)→π*(diimine)] state due to the higher-lying π*(CNR) orbital, the emission origin of these complexes is ascribed to MLCT [dπ(Re)→π*(diimine)] state. Although many of these complexes exhibit rich photophysical properties, study of the excited state dynamics of Re(I) complexes with different types MLCT excited states is lacking. Apart from Re(I) complexes with phosphoescence derived from MLCT [dπ(Re)→π*(diimine)] state, we have also designed Re(I) complexes with emissive triplet MLCT [dπ(Re) → π*(CNR)] state.
On the basis of the characteristic intense C=N, C=C, C≡N and C≡O stretches of the ligands in these metal complexes, herein, we present a detailed vibrational and time-resolved spectroscopic studies to provide a detailed understanding on their electronic transitions, excited state dynamics, vibration relaxation and nonradiative deactivation pathway. These results provide insights for designing emissive transition metal complexes and enhancing their phosphorescent properties.
On the basis of the characteristic intense C=N, C=C, C≡N and C≡O stretches of the ligands in these metal complexes, herein, we present a detailed vibrational and time-resolved spectroscopic studies to provide a detailed understanding on their electronic transitions, excited state dynamics, vibration relaxation and nonradiative deactivation pathway. These results provide insights for designing emissive transition metal complexes and enhancing their phosphorescent properties.
| Original language | English |
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| Publication status | Presented - Dec 2021 |
| Event | The 2021 International Chemical Congress of Pacific Basin Societies - Honolulu, Honolulu, United States Duration: 16 Dec 2021 → 21 Dec 2021 https://pacifichem.org/general-information/about-the-pacifichem-congress/ |
Conference
| Conference | The 2021 International Chemical Congress of Pacific Basin Societies |
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| Country/Territory | United States |
| City | Honolulu |
| Period | 16/12/21 → 21/12/21 |
| Internet address |