Excited-State Dynamics in Rigid Media: Evidence for Long-Range Energy Transfer

2013 ◽  
Vol 117 (12) ◽  
pp. 3428-3438 ◽  
Author(s):  
Akitaka Ito ◽  
David J. Stewart ◽  
Troy E. Knight ◽  
Zhen Fang ◽  
M. Kyle Brennaman ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Excited State ◽  
Long Range ◽  
Excited State Dynamics

scholarly journals Sensitization of ultra-long-range excited-state electron transfer by energy transfer in a polymerized film

2012 ◽  
Vol 109 (38) ◽  
pp. 15132-15135 ◽  
Author(s):  
Akitaka Ito ◽  
David J. Stewart ◽  
Zhen Fang ◽  
M. Kyle Brennaman ◽  
Thomas J. Meyer
Keyword(s):  
Electron Transfer ◽  
Energy Transfer ◽  
Excited State ◽  
Charge Transfer ◽  
Long Range ◽  
Methyl Viologen ◽  
Polymer Network ◽  
Triplet Energy ◽  
Ligand Charge Transfer ◽  
Triplet Energy Transfer

Distance-dependent energy transfer occurs from the Metal-to-Ligand Charge Transfer (MLCT) excited state to an anthracene-acrylate derivative (Acr-An) incorporated into the polymer network of a semirigid poly(ethyleneglycol)dimethacrylate monolith. Following excitation, to Acr-An triplet energy transfer occurs followed by long-range, Acr-3An—Acr-An → Acr-An—Acr-3An, energy migration. With methyl viologen dication (MV2+) added as a trap, Acr-3An + MV2+ → Acr-An+ + MV+ electron transfer results in sensitized electron transfer quenching over a distance of approximately 90 Å.

scholarly journals Disentanglement of excited-state dynamics with implications for FRET measurements: two-dimensional electronic spectroscopy of a BODIPY-functionalized cavitand

2018 ◽  
Vol 9 (15) ◽  
pp. 3694-3703 ◽  
Author(s):  
John P. Otto ◽  
Lili Wang ◽  
Igor Pochorovski ◽  
Samuel M. Blau ◽  
Alán Aspuru-Guzik ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Excited State ◽  
Conformational Changes ◽  
Electronic Spectroscopy ◽  
Two Dimensional ◽  
Excited State Dynamics ◽  
Competing Dynamics

Two-dimensional electronic spectroscopy of energy transfer and competing dynamics highlights how conformational changes create issues with lifetime-based FRET measurements.

scholarly journals Energy Transfer Mechanisms and Excited State Dynamics of Yb3+, Tm3+and Ho3+Doped Gd3Ga5O12Single Crystals

1993 ◽  
Vol 84 (5) ◽  
pp. 931-939 ◽  
Author(s):  
A. Brenier ◽  
L.C. Courrol ◽  
C. Pédrini ◽  
C. Madej ◽  
G. Boulon
Keyword(s):  
Energy Transfer ◽  
Excited State ◽  
Excited State Dynamics ◽  
Transfer Mechanisms

scholarly journals Temperature Dependent Anomalous Mn2+ Emission and Excited State Dynamics in Mn2+-Doped MAPbCl3-xBrx Nanocrystals

2021 ◽  
Author(s):  
Bhushan Kore ◽  
Shyamashis Das ◽  
D. D. Sarma
Keyword(s):  
Energy Transfer ◽  
Excited State ◽  
Band Gap ◽  
Transition Metal Ions ◽  
Anomalous Behavior ◽  
Feed Ratio ◽  
Temperature Dependent ◽  
Efficient Energy Transfer ◽  
Photovoltaic Properties ◽  
Excited State Dynamics

In hybrid perovskites, MAPbI<sub>3</sub> and MAPbBr<sub>3</sub> have been extensively studied for their optical and photovoltaic properties, but MAPbCl<sub>3</sub> is significantly less investigated for its optical and photovoltaic properties due to its low photoluminescence quantum yield (PL QY) and a large<br>band gap. However, the large band gap makes it a suitable host for doping transition metal ions to explore new optical properties. We synthesized nanocrystals (NCs) of MAPbCl<sub>3</sub> doped with Mn<sup>2+</sup> by simple ligand assisted reprecipitation method. The reaction temperature and Pb to Mn feed ratio were optimized by preparing a series of Mn<sup>2+</sup>-doped MAPbCl<sub>3</sub> NCs. The prepared NCs show bright Mn<sup>2+</sup> emission with ~13% PL QY suggesting an efficient energy transfer from host NCs to Mn<sup>2+</sup>. Since the large bandgap of MAPbCl3 precludes the possibility of investigating temperature dependent PL and lifetime measurements to understand the excited state dynamics, we carried out these experiments on Mn<sup>2+</sup> doped MAPbCl<sub>2.7</sub>Br<sub>0.3</sub> with the Br concentration adjusted to bring the bandgap of the alloyed system within the limits of the experimental technique. Our studies establish an anomalous behavior of Mn<sup>2+</sup> PL emission in this host. These results reveal the origin of a temperature mediated energy transfer from exciton to Mn<sup>2+</sup> and provides an understanding of the underlying mechanisms of PL properties of this new class of NCs. <br>

Excited state dynamics and energy transfer processes in YVO4:Er3+ crystals

1997 ◽  
Vol 82 (8) ◽  
pp. 3983-3986 ◽  
Author(s):  
P. Kabro ◽  
J. A. Capobianco ◽  
F. S. Ermeneux ◽  
R. Moncorgé ◽  
M. Bettinelli ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Excited State ◽  
Excited State Dynamics ◽  
Transfer Processes

scholarly journals Exciton localization in excited-state dynamics of a tetracene trimer: a surface hopping LC-TDDFTB study

2018 ◽  
Vol 20 (40) ◽  
pp. 25995-26007 ◽  
Author(s):  
Evgenii Titov ◽  
Alexander Humeniuk ◽  
Roland Mitrić
Keyword(s):  
Excited State ◽  
Long Range ◽  
Surface Hopping ◽  
Excited State Dynamics ◽  
Exciton Localization

Ultrafast exciton localization in a tetracene trimer is revealed with long-range corrected DFTB surface hopping simulations.

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