Exogenous compounds in studying the mechanism of electron-excited state formation in bioluminescence

Biopolymers ◽  
2004 ◽  
Vol 74 (1-2) ◽  
pp. 100-104 ◽  
Author(s):  
N. S. Kudryasheva ◽  
E. V. Nemtseva ◽  
T. N. Kirillova
Keyword(s):  
Excited State ◽  
State Formation ◽  
Exogenous Compounds

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

Electronically Excited State Formation

1994 ◽  
pp. 384-399
Author(s):  
Enrique Cadenas ◽  
Cecilia Giulivi ◽  
Fulvio Ursini ◽  
Alberto Boveris
Keyword(s):  
Excited State ◽  
State Formation ◽  
Electronically Excited State ◽  
Electronically Excited

Distance of Excited-State Formation in Ion-Surface Collisions

1986 ◽  
Vol 57 (21) ◽  
pp. 2649-2652 ◽  
Author(s):  
Joachim Burgdörfer ◽  
Eckart Kupfer
Keyword(s):  
Excited State ◽  
State Formation

Excited-state formation asH+andHe+ions scatter from metal surfaces

1975 ◽  
Vol 12 (3) ◽  
pp. 876-884 ◽  
Author(s):  
W. E. Baird ◽  
M. Zivitz ◽  
E. W. Thomas
Keyword(s):  
Excited State ◽  
State Formation ◽  
Metal Surfaces

Efficient intersystem crossing using singly halogenated carbomethoxyphenyl porphyrins measured using delayed fluorescence, chemical quenching, and singlet oxygen emission

2015 ◽  
Vol 17 (43) ◽  
pp. 29090-29096 ◽  
Author(s):  
Dawn M. Marin ◽  
Sonia Payerpaj ◽  
Graham S. Collier ◽  
Angy L. Ortiz ◽  
Gaurav Singh ◽  
...  
Keyword(s):  
Excited State ◽  
Singlet Oxygen ◽  
State Formation ◽  
Delayed Fluorescence ◽  
Intersystem Crossing ◽  
Fluorescence Lifetimes ◽  
Triplet Excited State

Singly halogenated carbomethoxyphenylporphyrins show decreased singlet fluorescence lifetimes and increased rates of triplet excited state formation.

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