Ultrafast excited-state dynamics at interfaces: fluorescent DNA probes at the dodecane/water interface

2015 ◽  
Author(s):  
Giuseppe Licari ◽  
Eric Vauthey
Keyword(s):  
Excited State ◽  
Dna Probes ◽  
Water Interface ◽  
Excited State Dynamics

scholarly journals Fluorescent DNA probes at liquid/liquid interfaces studied by surface second harmonic generation

2016 ◽  
Vol 18 (4) ◽  
pp. 2981-2992 ◽  
Author(s):  
Giuseppe Licari ◽  
Pierre-François Brevet ◽  
Eric Vauthey
Keyword(s):  
Excited State ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Bulk Water ◽  
Dna Probes ◽  
Water Interface ◽  
Liquid Interfaces

The excited-state properties of oxazole yellow DNA probes change substantially when going from bulk water to the dodecane/water interface.

Excited-State Dynamics of an Environment-Sensitive Push–Pull Diketopyrrolopyrrole: Major Differences between the Bulk Solution Phase and the Dodecane/Water Interface

2014 ◽  
Vol 118 (33) ◽  
pp. 9952-9963 ◽  
Author(s):  
Sabine Richert ◽  
Sandra Mosquera Vazquez ◽  
Marek Grzybowski ◽  
Daniel T. Gryko ◽  
Alexander Kyrychenko ◽  
...  
Keyword(s):  
Excited State ◽  
Solution Phase ◽  
Bulk Solution ◽  
Water Interface ◽  
Excited State Dynamics

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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