scholarly journals Unconventional two-step spin relaxation dynamics of [Re(CO)3(im)(phen)]+ in aqueous solution

2019 ◽  
Vol 10 (44) ◽  
pp. 10405-10411 ◽  
Author(s):  
Sebastian Mai ◽  
Leticia González
Keyword(s):  
Aqueous Solution ◽  
Excited State ◽  
Spin Relaxation ◽  
Intersystem Crossing ◽  
Relaxation Dynamics ◽  
Excited State Dynamics ◽  
Dynamics Simulations ◽  
Explicit Solvation

Full-dimensional excited-state dynamics simulations including explicit solvation show an unprecedented two-step intersystem crossing mechanism with electronic- and nuclear-driven components in [Re(CO)3(imidazole)(phenanthroline)]+.

Excited-state dynamics of guanosine in aqueous solution revealed by time-resolved photoelectron spectroscopy: experiment and theory

2015 ◽  
Vol 17 (47) ◽  
pp. 31978-31987 ◽  
Author(s):  
Franziska Buchner ◽  
Berit Heggen ◽  
Hans-Hermann Ritze ◽  
Walter Thiel ◽  
Andrea Lübcke
Keyword(s):  
Aqueous Solution ◽  
Excited State ◽  
Photoelectron Spectroscopy ◽  
Relaxation Dynamics ◽  
Time Resolved ◽  
Excited State Dynamics ◽  
Spectroscopy Experiment

Time-resolved photoelectron spectroscopy is performed on aqueous guanosine solution to study its excited-state relaxation dynamics.

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.

scholarly journals Excited state dynamics of protonated keto uracil: intersystem crossing pathways in competition

2021 ◽  
Vol 75 (1) ◽  
Author(s):  
Jordan Dezalay ◽  
Michel Broquier ◽  
Satchin Soorkia ◽  
Gilles Grégoire
Keyword(s):  
Excited State ◽  
Intersystem Crossing ◽  
Excited State Dynamics

scholarly journals Visualizing excited state dynamics of conjugated molecules trough femtosecond stimulated Raman scattering

2019 ◽  
Vol 205 ◽  
pp. 09015
Author(s):  
Batignani Giovanni ◽  
Pontecorvo Emanuele ◽  
Ferrante Carino ◽  
Aschi Massimiliano ◽  
Elles Christopher G. ◽  
...  
Keyword(s):  
Excited State ◽  
Raman Scattering ◽  
Model Compound ◽  
Stimulated Raman Scattering ◽  
Reaction Pathway ◽  
Structural Rearrangement ◽  
Intersystem Crossing ◽  
Conjugated Molecules ◽  
Excited State Dynamics ◽  
Stimulated Raman

The reaction pathway in the photoexcited model compound 2-methyl-5-phenylthiophene has been unravelled by Femtosecond Stimulated Raman Scattering and quantum chemical calculations. The excited state dynamics, including structural rearrangement, vibrational cooling and intersystem-crossing, will be presented.

Excited-State Dynamics of Structurally Characterized [Re I (CO) 3 (phen)(HisX)] + (X = 83, 109) Pseudomonas a eruginosa Azurins in Aqueous Solution

2006 ◽  
Vol 128 (13) ◽  
pp. 4365-4370 ◽  
Author(s):  
Ana Mar�a Blanco-Rodr�guez ◽  
Michael Busby ◽  
Cristian Gradinaru ◽  
Brian R. Crane ◽  
Angel J. Di Bilio ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Excited State ◽  
Excited State Dynamics
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