276
D. Escudero
Fig. 4 Experimental a and computed b temperature-dependent global photoluminescence decay
for 1. Reprinted with permission from [37]. Copyright 2018 American chemical society
experimental observations. Note that obtaining accurate PLQYs’ estimations still
remains difficult due to the inaccuracies on the computed DFT energies and because
the energies are exponentially related with the decay rates. Nevertheless, since all
possible kinetic scenarios are included, the validity of this general approach is valid
for a wide chemical space, i.e., from deep-blue to yellow-to-red phosphors. Another
important conclusion of this study is that a E a value of ca. 4000 cm
−1 is enough to
impede the population of the k nr (T ) channel at RT, which might help in the design
of the new generation of efficient blue phosphors for PhOLEDs.
3.2 ES Dynamics: TSH Dynamics Including ISC
in [Ru(bpy) 3 ] 2+
This selected work [69] underlines the in-deep understanding one can attain with
state-of-the-art on-the-fly nonadiabatic molecular dynamics simulations for TMCs.
As highlighted in Sect. 1, these methods permit to track the evolution of the ES
species in real time and have provided an in-depth understanding of the ultrafast IC
and ISC processes of TMCs, otherwise difficult to obtain due to the high density
of ES of various multiplicities and characters for these molecular systems. In [69],
González and coworkers performed TSH dynamics coupled to LR-TD-PBE calculations including explicit nonadiabatic couplings and SOCs, as implemented in the
SHARC suite [95, 96], to model the ultrafast IC and ISC dynamics in [Ru(bpy) 3 ]
2+ .
Note that, as mentioned in Sect. 2.1, special caution should be put when using LRTD-DFT methods to treat near-degenerate ES. Since these near-degeneracy regions
are ubiquitous in [Ru(bpy) 3 ]
2+ , it is fair alerting on the reliability of these results,
although it is also fair noting that TD-DFT remains to date the only possibility in
practical terms to perform TSH dynamics in TMCs. Experimentally, it was found
that ISC processes occur in less than 30 fs with almost unity yield for this TMC. In
D. Escudero
Fig. 4 Experimental a and computed b temperature-dependent global photoluminescence decay
for 1. Reprinted with permission from [37]. Copyright 2018 American chemical society
experimental observations. Note that obtaining accurate PLQYs’ estimations still
remains difficult due to the inaccuracies on the computed DFT energies and because
the energies are exponentially related with the decay rates. Nevertheless, since all
possible kinetic scenarios are included, the validity of this general approach is valid
for a wide chemical space, i.e., from deep-blue to yellow-to-red phosphors. Another
important conclusion of this study is that a E a value of ca. 4000 cm
−1 is enough to
impede the population of the k nr (T ) channel at RT, which might help in the design
of the new generation of efficient blue phosphors for PhOLEDs.
3.2 ES Dynamics: TSH Dynamics Including ISC
in [Ru(bpy) 3 ] 2+
This selected work [69] underlines the in-deep understanding one can attain with
state-of-the-art on-the-fly nonadiabatic molecular dynamics simulations for TMCs.
As highlighted in Sect. 1, these methods permit to track the evolution of the ES
species in real time and have provided an in-depth understanding of the ultrafast IC
and ISC processes of TMCs, otherwise difficult to obtain due to the high density
of ES of various multiplicities and characters for these molecular systems. In [69],
González and coworkers performed TSH dynamics coupled to LR-TD-PBE calculations including explicit nonadiabatic couplings and SOCs, as implemented in the
SHARC suite [95, 96], to model the ultrafast IC and ISC dynamics in [Ru(bpy) 3 ]
2+ .
Note that, as mentioned in Sect. 2.1, special caution should be put when using LRTD-DFT methods to treat near-degenerate ES. Since these near-degeneracy regions
are ubiquitous in [Ru(bpy) 3 ]
2+ , it is fair alerting on the reliability of these results,
although it is also fair noting that TD-DFT remains to date the only possibility in
practical terms to perform TSH dynamics in TMCs. Experimentally, it was found
that ISC processes occur in less than 30 fs with almost unity yield for this TMC. In