Composition-dependent electronic energy relaxation dynamics of metal domains as revealed by bimetallic Au144−xAgx(SC8H9)60 monolayer-protected clusters

2017 ◽  
Vol 19 (22) ◽  
pp. 14471-14477 ◽  
Author(s):  
Hongjun Zheng ◽  
Marcus A. Tofanelli ◽  
Christopher J. Ackerson ◽  
Kenneth L. Knappenberger
Keyword(s):  
Energy Relaxation ◽  
Electronic Energy ◽  
Model Systems ◽  
Electronic Relaxation ◽  
Relaxation Dynamics ◽  
Monolayer Protected Clusters

The influence of nanoscale composition on electronic relaxation is determined using monolayer-protected clusters as structurally precise model systems.

scholarly journals Ligand- and Solvent-Dependent Electronic Relaxation Dynamics of Au25(SR)18– Monolayer-Protected Clusters

2017 ◽  
Vol 121 (44) ◽  
pp. 24894-24902 ◽  
Author(s):  
Chongyue Yi ◽  
Hongjun Zheng ◽  
Patrick J. Herbert ◽  
Yuxiang Chen ◽  
Rongchao Jin ◽  
...  
Keyword(s):  
Electronic Relaxation ◽  
Relaxation Dynamics ◽  
Monolayer Protected Clusters

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>

Unraveling the electronic relaxation dynamics in photoexcited 2,4-difluoroaniline via femtosecond time-resolved photoelectron imaging

2018 ◽  
Vol 148 (14) ◽  
pp. 144311 ◽  
Author(s):  
Fengzi Ling ◽  
Shuai Li ◽  
Jie Wei ◽  
Kai Liu ◽  
Yanmei Wang ◽  
...  
Keyword(s):  
Electronic Relaxation ◽  
Relaxation Dynamics ◽  
Photoelectron Imaging ◽  
Time Resolved

scholarly journals Electronic Relaxation Dynamics of UV-Photoexcited 2-Aminopurine–Thymine Base Pairs in Watson–Crick and Hoogsteen Conformations

2019 ◽  
Vol 123 (13) ◽  
pp. 2904-2914 ◽  
Author(s):  
Hendrik Böhnke ◽  
Katharina Röttger ◽  
Rebecca A. Ingle ◽  
Hugo J. B. Marroux ◽  
Mats Bohnsack ◽  
...  
Keyword(s):  
Electronic Relaxation ◽  
Relaxation Dynamics ◽  
Base Pairs

Time-resolved intraband electronic relaxation dynamics of Hgn− clusters (n=7–13,15,18) excited at 1.0 eV

2005 ◽  
Vol 122 (5) ◽  
pp. 054314 ◽  
Author(s):  
Arthur E. Bragg ◽  
Jan R. R. Verlet ◽  
Aster Kammrath ◽  
Ori Cheshnovsky ◽  
Daniel M. Neumark
Keyword(s):  
Electronic Relaxation ◽  
Relaxation Dynamics ◽  
Time Resolved

The photocatalytic activity and degradation mechanism of methylene blue over copper(ii) tetra(4-carboxyphenyl) porphyrin sensitized TiO2under visible light irradiation

RSC Advances ◽  
2014 ◽  
Vol 4 (55) ◽  
pp. 28978-28986 ◽  
Author(s):  
Huigang Wang ◽  
Dongmei Zhou ◽  
Shaosong Shen ◽  
Junmin Wan ◽  
Xuming Zheng ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Catalytic Mechanism ◽  
Degradation Mechanism ◽  
Light Irradiation ◽  
Electronic Relaxation ◽  
Relaxation Dynamics

Copper(ii)tetra(4-carboxyphenyl) porphyrin were chemically sensitized on TiO2, its electronic relaxation dynamics and the visible-light induced catalytic mechanism are discussed.

Ultrafast Energy Relaxation Dynamics of C120, a [2+2]-bridged C60Dimer

2000 ◽  
Vol 104 (43) ◽  
pp. 9666-9669 ◽  
Author(s):  
Hyun Sun Cho ◽  
Seong Keun Kim ◽  
Dongho Kim ◽  
Koichi Fujiwara ◽  
Koichi Komatsu
Keyword(s):  
Energy Relaxation ◽  
Relaxation Dynamics
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