Folding-Induced Modulation of Excited-State Dynamics in an Oligophenylene-Ethynylene-Tethered Spiral Perylene Bisimide Aggregate

ChemPhysChem ◽  
2015 ◽  
Vol 16 (8) ◽  
pp. 1757-1767 ◽  
Author(s):  
Minjung Son ◽  
Benjamin Fimmel ◽  
Volker Dehm ◽  
Frank Würthner ◽  
Dongho Kim
Keyword(s):  
Excited State ◽  
Excited State Dynamics ◽  
Perylene Bisimide

scholarly journals Photoinduced Interactions in a Pyrene-Calix[4]arene-Perylene Bisimide Dye System: Probing Ground-State Conformations with Excited-State Dynamics of Charge Separation and Recombination

2009 ◽  
Vol 113 (42) ◽  
pp. 18358-18368 ◽  
Author(s):  
Nguyen Vân Anh ◽  
Felix Schlosser ◽  
Michiel M. Groeneveld ◽  
Ivo H. M. van Stokkum ◽  
Frank Würthner ◽  
...  
Keyword(s):  
Excited State ◽  
Ground State ◽  
Charge Separation ◽  
Excited State Dynamics ◽  
Perylene Bisimide

scholarly journals Guest and solvent modulated photo-driven charge separation and triplet generation in a perylene bisimide cyclophane

2016 ◽  
Vol 7 (8) ◽  
pp. 5428-5434 ◽  
Author(s):  
Peter Spenst ◽  
Ryan M. Young ◽  
Michael R. Wasielewski ◽  
Frank Würthner
Keyword(s):  
Excited State ◽  
Charge Separation ◽  
Excited State Dynamics ◽  
Perylene Bisimide

The modulation of the excited state dynamics in a perylene bisimide cyclophane was achieved by solvent and guest variation.

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

Femtosecond Spectroscopic Studies of the One- and Two-Photon Excited-State Dynamics of 2,2,17,17-Tetramethyloctadeca-5,9,13-trien-3,7,11,15-tetrayne:  A Trimeric Oligodiacetylene

2006 ◽  
Vol 110 (40) ◽  
pp. 11435-11439 ◽  
Author(s):  
Grzegorz M. Balkowski ◽  
Michiel Groeneveld ◽  
Hong Zhang ◽  
Cindy C. J. Hendrikx ◽  
Michael Polhuis ◽  
...  
Keyword(s):  
Excited State ◽  
Spectroscopic Studies ◽  
Excited State Dynamics ◽  
Two Photon ◽  
The One
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