Assignment of IR bands of isolated and protein-bound Peridinin in its fundamental and triplet state by static FTIR, time-resolved step-scan FTIR and DFT calculations

2015 ◽  
Vol 1090 ◽  
pp. 58-64 ◽  
Author(s):  
Alberto Mezzetti ◽  
Elizabeth Kish ◽  
Bruno Robert ◽  
Riccardo Spezia
Keyword(s):  
Dft Calculations ◽  
Triplet State ◽  
Time Resolved ◽  
Ir Bands

Solvent Dependence of Structural Dynamics and Spin-flip Processes in 3,4,5-tri(9H-carbazole-9-yl)benzonitrile (ortho-3CzBN)

2020 ◽  
Author(s):  
Masaki Saigo ◽  
Kiyoshi Miyata ◽  
Hajime Nakanotani ◽  
Chihaya Adachi ◽  
Ken Onda
Keyword(s):  
Dft Calculations ◽  
Excited States ◽  
Structural Changes ◽  
Photophysical Properties ◽  
Delayed Fluorescence ◽  
Time Resolved ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Solvent Dependence ◽  
Acetonitrile Solutions

We have investigated the solvent-dependence of structural changes along with intersystem crossing of a thermally activated delayed fluorescence (TADF) molecule, 3,4,5-tri(9H-carbazole-9-yl)benzonitrile (o-3CzBN), in toluene, tetrahydrofuran, and acetonitrile solutions using time-resolved infrared (TR-IR) spectroscopy and DFT calculations. We found that the geometries of the S1 and T1 states are very similar in all solvents though the photophysical properties mostly depend on the solvent. In addition, the time-dependent DFT calculations based on these geometries suggested that the thermally activated delayed fluorescence process of o-3CzBN is governed more by the higher-lying excited states than by the structural changes in the excited states.<br>

scholarly journals Mechanistic insights for the photoredox organocatalytic fluorination of aliphatic carbons by anthraquinone using time-resolved and DFT studies

2017 ◽  
Vol 7 (4) ◽  
pp. 848-857 ◽  
Author(s):  
J. W. Kee ◽  
H. Shao ◽  
C. W. Kee ◽  
Y. Lu ◽  
H. S. Soo ◽  
...  
Keyword(s):  
Dft Calculations ◽  
Dft Studies ◽  
Time Resolved

Nanosecond TAS and DFT calculations reveal mechanistic insights for photoredox fluorination of aliphatic C–H bonds and evidence of an anthraquinone–Selectfluor® exciplex.

DFT Calculations on Group 5 Mixed Metal Tetramers: TaxNbyVz (x + y + z = 4)

2004 ◽  
Vol 57 (12) ◽  
pp. 1197 ◽  
Author(s):  
Magdalene A. Addicoat ◽  
Mark A. Buntine ◽  
Gregory F. Metha
Keyword(s):  
Density Functional Theory ◽  
Dft Calculations ◽  
Triplet State ◽  
Density Functional ◽  
Metal Cluster ◽  
Functional Theory ◽  
Mixed Metal ◽  
Mixed Metal Cluster ◽  
Group 5

We report Density Functional Theory (DFT) calculations on mixed-metal tetramers comprised of the Group 5 (Vb) elements V, Nb, and Ta. Our results show that the lowest energy structures for Nb4 and Ta4 are regular tetrahedra with Td symmetry and singlet multiplicity whereas V4 is a triplet state with C2v symmetry. The monosubstituted isomers, A3B, all have C3v symmetry but several higher energy Cs structures have been found that are approximately 100 kJ mol−1 higher in energy. The disubstituted isomers all posses arachno-butterfly structures; the A2B2 types with C2v symmetry and the A2BC types with Cs symmetry. However, the relative openness of the arachno structures is found to be specific to the composition of the mixed-metal cluster.

The triplet state of a platinum acetylide chromophore examined by time-resolved infrared spectroscopy and density functional theory

2004 ◽  
Vol 400 (1-3) ◽  
pp. 239-244 ◽  
Author(s):  
Thomas M. Cooper ◽  
Jean-Philippe Blaudeau ◽  
Benjamin C. Hall ◽  
Joy E. Rogers ◽  
Daniel G. McLean ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Infrared Spectroscopy ◽  
Triplet State ◽  
Density Functional ◽  
Functional Theory ◽  
Time Resolved ◽  
Time Resolved Infrared Spectroscopy

Synthesis and photophysical properties of extended π conjugated naphthalimides

2017 ◽  
Vol 16 (4) ◽  
pp. 539-546 ◽  
Author(s):  
C. Rémy ◽  
C. Allain ◽  
I. Leray
Keyword(s):  
Charge Transfer ◽  
Dft Calculations ◽  
Photophysical Properties ◽  
Photoinduced Charge Transfer ◽  
Time Resolved ◽  
Time Resolved Spectroscopy ◽  
Td Dft ◽  
Photoinduced Charge

A series of π conjugated naphthalimide derivatives were prepared. Compounds display efficient photoinduced charge transfer in solution which was rationalized by time-resolved spectroscopy and modelled by TD-DFT calculations.

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