Fast excited state formation and decay in the pulse radiolysis of gaseous argon–iodine systems

1976 ◽  
Vol 64 (11) ◽  
pp. 4587-4591 ◽  
Author(s):  
Myran C. Sauer ◽  
William A. Mulac ◽  
Ronald Cooper ◽  
Franz Grieser
Keyword(s):  
Excited State ◽  
State Formation ◽  
Pulse Radiolysis

Kinetics of solute excited state formation in the pulse radiolysis of 9,10-diphenyl anthracene and p-terphenyl in cyclohexane solutions

1979 ◽  
Vol 63 (3) ◽  
pp. 535-538 ◽  
Author(s):  
Charles D. Jonah ◽  
Myran C. Sauer ◽  
Ronald Cooper ◽  
Alexander D. Trifunac
Keyword(s):  
Excited State ◽  
State Formation ◽  
Pulse Radiolysis ◽  
Kinetics Of

scholarly journals Ultrafast excited state dynamics and light-switching of [Ru(phen)2(dppz)]2+ in G-quadruplex DNA

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Chunfan Yang ◽  
Qian Zhou ◽  
Zeqing Jiao ◽  
Hongmei Zhao ◽  
Chun-Hua Huang ◽  
...  
Keyword(s):  
Excited State ◽  
State Formation ◽  
Rational Design ◽  
Bound Water ◽  
Binding Modes ◽  
Relaxation Dynamics ◽  
Dark State ◽  
Excited State Dynamics ◽  
G Quadruplex ◽  
Mechanistic Basis

AbstractThe triplet metal to ligand charge transfer (3MLCT) luminescence of ruthenium (II) polypyridyl complexes offers attractive imaging properties, specifically towards the development of sensitive and structure-specific DNA probes. However, rapidly-deactivating dark state formation may compete with 3MLCT luminescence depending on different DNA structures. In this work, by combining femtosecond and nanosecond pump-probe spectroscopy, the 3MLCT relaxation dynamics of [Ru(phen)2(dppz)]2+ (phen = 1,10-phenanthroline, dppz = dipyridophenazine) in two iconic G-quadruplexes has been scrutinized. The binding modes of stacking of dppz ligand on the terminal G-quartet fully and partially are clearly identified based on the biexponential decay dynamics of the 3MLCT luminescence at 620 nm. Interestingly, the inhibited dark state channel in ds-DNA is open in G-quadruplex, featuring an ultrafast picosecond depopulation process from 3MLCT to a dark state. The dark state formation rates are found to be sensitive to the content of water molecules in local G-quadruplex structures, indicating different patterns of bound water. The unique excited state dynamics of [Ru(phen)2(dppz)]2+ in G-quadruplex is deciphered, providing mechanistic basis for the rational design of photoactive ruthenium metal complexes in biological applications.

Role of Surface Interactions in Beam-Foil Excited-State Formation

1981 ◽  
Vol 47 (7) ◽  
pp. 487-490 ◽  
Author(s):  
N. H. Tolk ◽  
L. C. Feldman ◽  
J. S. Kraus ◽  
J. C. Tully ◽  
M. Hass ◽  
...  
Keyword(s):  
Excited State ◽  
State Formation ◽  
Surface Interactions ◽  
Beam Foil
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