| Autor: |
Alberding, Brian G., Chisholm, Malcolm H., Gustafson, Terry L., Liu, Yao, Reed, Carly R., Turro, Claudia |
| Zdroj: |
The Journal of Physical Chemistry - Part A; 20240101, Issue: Preprints |
| Abstrakt: |
The title compounds trans-M2(O2CMe)2[C(iPrN)2CCPh]2, I(M = Mo) and II(M = W), show electronic absorptions in the visible region of the spectrum assignable to 1MLCT [M2δ to phenylethynylamidinate π*]. These compounds show dual emission from S1and T1states. For both Iand II, S1is 1MLCT, but for Ithe T1state is shown to be MMδδ* while for IIT1is 3MLCT. The lifetimes of the S1and T1states have been determined by femtosecond and nanosecond transient absorption spectroscopy: for IS1∼ 20 ps and T1∼ 100 μs and for IIS1∼ 6 ps and T1∼ 5 μs. From solvent dependence of the absorption and emission spectra, we suggest that the S1states are localized on one amidinate ligand though the initial absorption is to a delocalized state. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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