3.5: Investigation of excited-state dynamics upon both photo- and electro-excitation of thermally activated delayed fluorescent molecules

2018 ◽  
Vol 49 ◽  
pp. 29-34
Author(s):  
Peng Wang ◽  
Qingyu Huang ◽  
Suling Zhao ◽  
Zheng Xu ◽  
Dandan Song ◽  
...  
Keyword(s):  
Excited State ◽  
Excited State Dynamics ◽  
Thermally Activated ◽  
Fluorescent Molecules

58-2: Revealing the Excited-state Dynamics of Thermally Activated Delayed Flourescence Molecules by using Transient Absorption Spectrospy

2016 ◽  
Vol 47 (1) ◽  
pp. 786-789 ◽  
Author(s):  
Takuya Hosokai ◽  
Hiroyuki Matsuzaki ◽  
Akihiro Furube ◽  
Katsumi Tokumaru ◽  
Tetsuo Tsutsui ◽  
...  
Keyword(s):  
Excited State ◽  
Transient Absorption ◽  
Excited State Dynamics ◽  
Thermally Activated

Using ultra-fast spectroscopy to probe the excited state dynamics of a reported highly efficient thermally activated delayed fluorescence chromophore

2019 ◽  
Vol 7 (14) ◽  
pp. 4210-4221 ◽  
Author(s):  
Ricardo Javier Vázquez ◽  
Hyungjun Kim ◽  
Paul M. Zimmerman ◽  
Theodore Goodson
Keyword(s):  
Excited State ◽  
Quantum Chemical ◽  
Delayed Fluorescence ◽  
Spectroscopic Techniques ◽  
Thermally Activated Delayed Fluorescence ◽  
Excited State Dynamics ◽  
Thermally Activated ◽  
Highly Efficient

Multiple ultrafast spectroscopic techniques and quantum chemical simulations (QCS) were used to investigate the excited state dynamics of BCC-TPTA.

Excited-State Dynamics in the RNA Nucleotide Uridine 5’-Monophosphate Investigated by Femtosecond Broadband Transient Absorption Spectroscopy

2019 ◽  
Author(s):  
Matthew M. Brister ◽  
Carlos Crespo-Hernández
Keyword(s):  
Excited State ◽  
Excited States ◽  
Ground State ◽  
Transient Absorption ◽  
Electronic Energy ◽  
Transient Absorption Spectroscopy ◽  
Electronic Relaxation ◽  
Vibrationally Excited ◽  
Excited State Dynamics ◽  
Π State

<p></p><p> Damage to RNA from ultraviolet radiation induce chemical modifications to the nucleobases. Unraveling the excited states involved in these reactions is essential, but investigations aimed at understanding the electronic-energy relaxation pathways of the RNA nucleotide uridine 5’-monophosphate (UMP) have not received enough attention. In this Letter, the excited-state dynamics of UMP is investigated in aqueous solution. Excitation at 267 nm results in a trifurcation event that leads to the simultaneous population of the vibrationally-excited ground state, a longlived <sup>1</sup>n<sub>O</sub>π* state, and a receiver triplet state within 200 fs. The receiver state internally convert to the long-lived <sup>3</sup>ππ* state in an ultrafast time scale. The results elucidate the electronic relaxation pathways and clarify earlier transient absorption experiments performed for uracil derivatives in solution. This mechanistic information is important because long-lived nπ* and ππ* excited states of both singlet and triplet multiplicities are thought to lead to the formation of harmful photoproducts.</p><p></p>

Modulation of Excited State Dynamics in Lead Halide Perovskite Films with Electrical Bias

2019 ◽  
Author(s):  
Gergely Samu ◽  
R.A. Scheidt ◽  
A. Balog ◽  
C. Janáky ◽  
P.V. Kamat
Keyword(s):  
Excited State ◽  
Excited State Dynamics ◽  
Halide Perovskite ◽  
Electrical Bias ◽  
Lead Halide
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