Application of Time-Resolved Linear Dichroism Spectroscopy:  Relaxation of Excited Hexamethylbenzene/1,2,4,5-Tetracyanobenzene Charge-Transfer Complexes

2001 ◽  
Vol 105 (3) ◽  
pp. 537-543 ◽  
Author(s):  
Bradley R. Arnold ◽  
Alexander W. Schill ◽  
Pavel V. Poliakov
Keyword(s):  
Charge Transfer ◽  
Linear Dichroism ◽  
Charge Transfer Complexes ◽  
Time Resolved

Application of Time-Resolved Linear Dichroism Spectroscopy:  Rapid Relaxation of Excited Charge Transfer Complexes

2001 ◽  
Vol 105 (45) ◽  
pp. 10404-10412 ◽  
Author(s):  
Bradley R. Arnold ◽  
Alex Euler ◽  
Pavel V. Poliakov ◽  
Alexander W. Schill
Keyword(s):  
Charge Transfer ◽  
Linear Dichroism ◽  
Charge Transfer Complexes ◽  
Time Resolved

Application of time-resolved linear dichroism spectroscopy: Intensity borrowing in charge transfer complex absorption spectra

2003 ◽  
Vol 81 (6) ◽  
pp. 567-574
Author(s):  
Dustin Levy ◽  
Bradley R Arnold
Keyword(s):  
Charge Transfer ◽  
Charge Transfer Complex ◽  
Chlorinated Solvents ◽  
Linear Dichroism ◽  
Charge Transfer Transition ◽  
Time Resolved ◽  
Transition Energies ◽  
Charge Transfer Transitions ◽  
Donor Acceptor ◽  
Influence Of Solvent

Time-resolved linear dichroism spectroscopy has been used to study the influence of solvent on the charge transfer complex formed between hexamethylbenzene and 1,2,4,5-tetracyanobenzene. It was shown that cyano-substituted solvents induce a 1500 cm–1 increase in the charge transfer transition energies relative to those observed in chlorinated solvents. Furthermore, the angle between the charge transfer absorption transition moments and the photochemically produced radical anion absorption transition moment, after relaxation, has been measured for this complex in several solvents. A simple model was used to correlate the angles measured using time-resolved linear dichroism spectroscopy with the extent of localized excitation mixed into the charge transfer transitions. These measurements reveal that different charge transfer transitions borrow intensity from the localized excitation to different extents. By using different excitation wavelengths, the partitioning of the borrowed intensity among the charge transfer transitions of this complex could be evaluated for the first time.Key words: 1,2,4,5-tetracyanobenzene, hexamethylbenzene, donor–acceptor complex, photoinduced electron transfer, photoselection.

Charge-transfer complexes of discogenic molecules : a time-resolved study based on Kerr ellipsometry

1993 ◽  
Vol 89 (1) ◽  
pp. 37 ◽  
Author(s):  
Dimitra Markovitsi ◽  
Nicola Pfeffer ◽  
Fabrice Charra ◽  
Jean-Michel Nunzi ◽  
Holger Bengs ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Charge Transfer Complexes ◽  
Time Resolved

Dramatic luminescence signal from a Co(ii)-based metal–organic compound due to the construction of charge-transfer bands with Al3+ and Fe3+ ions in water: steady-state and time-resolved spectroscopic studies

2020 ◽  
Vol 44 (11) ◽  
pp. 4376-4385 ◽  
Author(s):  
Pooja Daga ◽  
Prakash Majee ◽  
Debal Kanti Singha ◽  
Priyanka Manna ◽  
Sayani Hui ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Steady State ◽  
Organic Compound ◽  
Spectroscopic Studies ◽  
Charge Transfer Complexes ◽  
Time Resolved ◽  
Luminescence Signal ◽  
Turn On ◽  
Metal Organic

A Co(ii)-based metal–organic compound exhibits luminescence turn-on by Al3+ and quenching by Fe3+ due to the formation of charge-transfer complexes/adducts.

Magnetic properties of new charge-transfer complexes based on manganese porphyrins

1997 ◽  
Vol 90 (3) ◽  
pp. 407-413
Author(s):  
MARC KELEMEN ◽  
CHRISTOPH WACHTER ◽  
HUBERT WINTER ◽  
ELMAR DORMANN ◽  
RUDOLF GOMPPER ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Charge Transfer ◽  
Charge Transfer Complexes ◽  
Manganese Porphyrins

Charge Transfer Complexation Boosts Molecular Conductance Through Fermi Level Pinning

2018 ◽  
Author(s):  
Kun Wang ◽  
Andrea Vezzoli ◽  
Iain Grace ◽  
Maeve McLaughlin ◽  
Richard Nichols ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Single Molecule ◽  
Quantum Interference ◽  
Transmission Function ◽  
Scanning Tunneling ◽  
Charge Transfer Complexes ◽  
Tunneling Microscopy ◽  
Quantum Interference Effect ◽  
Single Molecule Junctions ◽  
Charge Transfer Complexation

We have used scanning tunneling microscopy to create and study single molecule junctions with thioether-terminated oligothiophene molecules. We find that the conductance of these junctions increases upon formation of charge transfer complexes of the molecules with tetracyanoethene, and that the extent of the conductance increase is greater the longer is the oligothiophene, i.e. the lower is the conductance of the uncomplexed molecule in the junction. We use non-equilibrium Green's function transport calculations to explore the reasons for this theoretically, and find that new resonances appear in the transmission function, pinned close to the Fermi energy of the contacts, as a consequence of the charge transfer interaction. This is an example of a room temperature quantum interference effect, which in this case boosts junction conductance in contrast to earlier observations of QI that result in diminished conductance.<br>

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