scholarly journals Charge Transfer Excitation and Asymmetric Energy Transfer at the Interface of Pentacene-Perfluoropentacene Heterostacks

2020 ◽  
Author(s):  
Anna-Katharina Hansmann ◽  
Robin C. Döring ◽  
Andre Rinn ◽  
Steffen M. Giesen ◽  
Melanie Fey ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Charge Transfer ◽  
Absorption Spectra ◽  
Molecular Alignment ◽  
Cryogenic Temperatures ◽  
Photoluminescence Excitation ◽  
Donor Acceptor ◽  
Charge Transfer Excitation ◽  
The One

The formation pathways of CT-excitons at the model crystalline donor-acceptor interface of pentacene-perfluoropentacene (PEN-PFP) is studied by a combination of advanced experimental and theoretical techniques. More specifically, we compare the one-photon photoluminescence excitation (PLE) and absorption spectra of three different PEN-PFP heterostructures with different molecular alignment at the interface at cryogenic temperatures. <br><div></div>

scholarly journals Charge Transfer Excitation and Asymmetric Energy Transfer at the Interface of Pentacene-Perfluoropentacene Heterostacks

2020 ◽  
Author(s):  
Anna-Katharina Hansmann ◽  
Robin C. Döring ◽  
Andre Rinn ◽  
Steffen M. Giesen ◽  
Melanie Fey ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Charge Transfer ◽  
Absorption Spectra ◽  
Molecular Alignment ◽  
Cryogenic Temperatures ◽  
Photoluminescence Excitation ◽  
Donor Acceptor ◽  
Charge Transfer Excitation ◽  
The One

The formation pathways of CT-excitons at the model crystalline donor-acceptor interface of pentacene-perfluoropentacene (PEN-PFP) is studied by a combination of advanced experimental and theoretical techniques. More specifically, we compare the one-photon photoluminescence excitation (PLE) and absorption spectra of three different PEN-PFP heterostructures with different molecular alignment at the interface at cryogenic temperatures. <br><div></div>

Reactive ion pairs from the charge-transfer excitation of electron donor-acceptor complexes

1986 ◽  
Vol 108 (6) ◽  
pp. 1126-1135 ◽  
Author(s):  
J. M. Masnovi ◽  
J. K. Kochi ◽  
E. F. Hilinski ◽  
P. M. Rentzepis
Keyword(s):  
Charge Transfer ◽  
Electron Donor ◽  
Ion Pairs ◽  
Donor Acceptor ◽  
Charge Transfer Excitation

CHARGE AND ENERGY TRANSFER IN BINAPHTHALENE MOLECULE WITH TWO SPIROPYRAN UNITS USED FOR CHIRAL MOLECULAR SWITCHES AND LOGIC GATES

2006 ◽  
Vol 05 (02) ◽  
pp. 163-174 ◽  
Author(s):  
MENGTAO SUN ◽  
FENGCAI MA
Keyword(s):  
Energy Transfer ◽  
Charge Transfer ◽  
Absorption Spectra ◽  
Transition Density ◽  
Logic Gates ◽  
Molecular Switches ◽  
Transition Dipole Moment ◽  
Real Space ◽  
Transition Dipole ◽  
Contour Plots

A new binaphthalene molecule with two spiropyran units used for chiral molecular switches and logic gates was synthesized and characterized.12 In this paper, charge and energy transfer in binaphthalene molecule with two spiropyran units are theoretically investigated with quantum chemistry method, as well as 2D and 3D real space analysis methods, since molecule construction with photoinduced electron transfer or charge transfer is one of the most frequently used pathways for building useful sensors and molecular machines. The orientation and strength of transition dipole moment in absorption spectra are obtained by 3D transition density. The orientation and results of intramolecular charge transfer on the excitation are obtained with 3D charge difference densities. The electron-hole coherence and excitation delocalization in absorption spectra are investigated with 2D contour plots of transition density matrix. Overall, the computed results remain in good agreement with the relevant experimental data, and the theoretical results reveal the relationship between the function of sensor and the excited state properties of the structure and transformation of the compound, upon addition of acid and base in absorption spectra.

Complexes moléculaires d'hétérocycles soufrés et oxygénés. Étude spectrophotométrique de bandes de transfert de charge multiples

1982 ◽  
Vol 60 (7) ◽  
pp. 862-871 ◽  
Author(s):  
Jean-Paul Canselier ◽  
Serge Domenech ◽  
Štefan Stankovsky ◽  
Sabine Gautier
Keyword(s):  
Charge Transfer ◽  
Absorption Spectra ◽  
Electronic Absorption ◽  
Electronic Absorption Spectra ◽  
Molecular Complexes ◽  
The Other ◽  
Ionization Potentials ◽  
Nonpolar Solvents ◽  
Other Hand ◽  
The One

As with benzenoid donors, the electronic absorption spectra of the molecular complexes of simple or condensed sulfur or oxygen-containing five-membered heterocycles with TCNE (or DDQ) often show two charge-transfer bands. In many cases, the knowledge of the actual frequencies requires a technique of resolution. The results so obtained are correlated with the ionization potentials of donors on the one hand, and the refractivity of nonpolar solvents on the other hand.

scholarly journals Shallow distance-dependent triplet energy migration mediated by endothermic charge-transfer

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Runchen Lai ◽  
Yangyi Liu ◽  
Xiao Luo ◽  
Lan Chen ◽  
Yaoyao Han ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Charge Transfer ◽  
Semiconductor Nanocrystals ◽  
Electronic Coupling ◽  
Alternative Mechanism ◽  
Acceptor Pair ◽  
Triplet Energy ◽  
Distance Dependence ◽  
Donor Acceptor ◽  
Triplet Energy Transfer

AbstractConventional wisdom posits that spin-triplet energy transfer (TET) is only operative over short distances because Dexter-type electronic coupling for TET rapidly decreases with increasing donor acceptor separation. While coherent mechanisms such as super-exchange can enhance the magnitude of electronic coupling, they are equally attenuated with distance. Here, we report endothermic charge-transfer-mediated TET as an alternative mechanism featuring shallow distance-dependence and experimentally demonstrated it using a linked nanocrystal-polyacene donor acceptor pair. Donor-acceptor electronic coupling is quantitatively controlled through wavefunction leakage out of the core/shell semiconductor nanocrystals, while the charge/energy transfer driving force is conserved. Attenuation of the TET rate as a function of shell thickness clearly follows the trend of hole probability density on nanocrystal surfaces rather than the product of electron and hole densities, consistent with endothermic hole-transfer-mediated TET. The shallow distance-dependence afforded by this mechanism enables efficient TET across distances well beyond the nominal range of Dexter or super-exchange paradigms.

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