scholarly journals Disentangling thermal and nonthermal excited states in a charge-transfer insulator by time- and frequency-resolved pump-probe spectroscopy

2009 ◽  
Vol 80 (23) ◽  
Author(s):  
Claudio Giannetti ◽  
Goran Zgrablic ◽  
Cristina Consani ◽  
Alberto Crepaldi ◽  
Damiano Nardi ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Excited States ◽  
Pump Probe ◽  
A Charge ◽  
Probe Spectroscopy

scholarly journals Time-Resolved Pump-Probe Spectroscopy with Spectral Domain Ghost Imaging

2020 ◽  
Author(s):  
Siqi Li ◽  
Taran Driver ◽  
Oliver Alexander ◽  
Bridgette Cooper ◽  
Douglas Garratt ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Pump Pulse ◽  
Chemical Bonding ◽  
Atomic Level ◽  
Spectral Domain ◽  
Ghost Imaging ◽  
Time Resolved ◽  
Pump Probe ◽  
Probe Spectroscopy

An atomic-level picture of molecular and bulk processes, such as chemical bonding and charge transfer, necessitatesanunderstandingofthedynamicalevolutionofthesesystems. Ontheultrafasttimescalesassociatedwithnuclearandelectronicmotion,thetemporalbehaviourofasystem is often interrogated in a ‘pump-probe’ scheme. Here, an initial ‘pump’ pulse triggers...

Charge-Transfer Dynamics in Rh6G-Functionalized TiO2 Nanoparticles Investigated by Pump-Probe Spectroscopy

2012 ◽  
Author(s):  
Euclides Almeida ◽  
Antonio M. Brito-Silva ◽  
Andréa F. da Silva ◽  
Giovanna Machado ◽  
Leonardo de S. Menezes ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Tio2 Nanoparticles ◽  
Pump Probe ◽  
Charge Transfer Dynamics ◽  
Probe Spectroscopy

Enhancement of two photon absorption properties and intersystem crossing by charge transfer in pentaaryl boron-dipyrromethene (BODIPY) derivatives

2016 ◽  
Vol 18 (19) ◽  
pp. 13546-13553 ◽  
Author(s):  
B. Küçüköz ◽  
G. Sevinç ◽  
E. Yildiz ◽  
A. Karatay ◽  
F. Zhong ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Photon Absorption ◽  
Intersystem Crossing ◽  
Absorption Properties ◽  
Pump Probe ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Boron Dipyrromethene ◽  
Probe Spectroscopy

Indication of charge transfer and an intersystem crossing mechanism for the B4 compound by using ultrafast pump probe spectroscopy.

CHAMELEON GROUND STATE AND EXCITED STATES OF EDT-TTF-IM-F4TCNQ RADICAL DYAD IN DIFFERENT ENVIRONMENTS

2012 ◽  
Vol 11 (03) ◽  
pp. 505-525 ◽  
Author(s):  
YUHUA ZHOU ◽  
KAI TAN ◽  
XIN LU
Keyword(s):  
Charge Transfer ◽  
Solid State ◽  
Excited States ◽  
Ground State ◽  
Density Functional ◽  
Solvent Polarity ◽  
Functional Study ◽  
Polar Solvents ◽  
Model Calculations ◽  
A Charge

We have performed a systematic density functional study on the ground-state electronic structure and excited states of a representative D-σ-A dyad, i.e. EDT-TTF-Im-F4TCNQ π-radical, in vacuo and in different conventional solvents (toluene, THF, DMF and DMSO) by using some popular hybrid density functionals (B3LYP, M05, M05-2X, PBE0 and BMK). It has been shown that the M05 and B3LYP functionals perform the best in predicting the intramolecular charge-transfer (ICT) pertaining to both the ground state and excited states of the dyad. The amphoteric dyad is liable to solvent-promoted ICT from its EDT-TTF-Im donor (D) to F4TCNQ acceptor (A), adopting a charge-unseparated ground state D-A• in vacuo, a partially zwitterionic ground state [D-A]• in nonpolar toluene solvent, and a fully zwitterionic ground state D•+-A- in such polar solvents as THF, DMF and DMSO. Owing to its solvent-dependent chameleon ground state, excited states of the dyad in solvents also exhibit remarkable dependence on solvent polarity, as revealed by TDDFT calculations. Furthermore, cluster model calculations revealed that intermolecular charge-transfer readily occurs between the dyads, accounting for the observed zwitterionic charge state in solid state and solid-state semiconductivity.

scholarly journals Ultrafast Evolution of the Excited States in the Chlorophylla/bComplex CP29 from Green Plants Studied by Energy-Selective Pump−Probe Spectroscopy†

Biochemistry ◽  
1998 ◽  
Vol 37 (4) ◽  
pp. 1143-1149 ◽  
Author(s):  
Claudiu C. Gradinaru ◽  
Andy A. Pascal ◽  
Frank van Mourik ◽  
Bruno Robert ◽  
Peter Horton ◽  
...  
Keyword(s):  
Excited States ◽  
Pump Probe ◽  
Green Plants ◽  
Probe Spectroscopy

Photoinduced long-lived charge transfer excited states in AT-DNA strands

2016 ◽  
Vol 18 (31) ◽  
pp. 21241-21245 ◽  
Author(s):  
Lara Martinez-Fernandez ◽  
Yuyuan Zhang ◽  
Kimberly de La Harpe ◽  
Ashley A. Beckstead ◽  
Bern Kohler ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Electronic State ◽  
Excited States ◽  
Ir Spectrum ◽  
Excited Electronic State ◽  
Single Strand ◽  
Dna Strands ◽  
A Charge ◽  
First Time

The IR spectrum of a charge transfer (CT) excited electronic state in DNA has been computed for the first time, enabling assignment of the long-lived component of the transient IR spectrum of a d(AT)9 single strand to an A → T CT state.

Tracking Charge Transfer in Carbon Nanotube Networks with Chirped Pump-Probe Spectroscopy

2011 ◽  
Author(s):  
Daniele Brida ◽  
Dario Polli ◽  
Jared Crochet ◽  
Tobias Hertel ◽  
Guglielmo Lanzani ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Carbon Nanotube ◽  
Pump Probe ◽  
Probe Spectroscopy ◽  
Carbon Nanotube Networks

scholarly journals Long-living optical gain induced by solvent viscosity in a push–pull molecule

2016 ◽  
Vol 18 (27) ◽  
pp. 18289-18296 ◽  
Author(s):  
M. M. Mróz ◽  
S. Benedini ◽  
A. Forni ◽  
C. Botta ◽  
D. Pasini ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Intramolecular Charge Transfer ◽  
Optical Gain ◽  
Pump Probe ◽  
Twisted Intramolecular Charge Transfer ◽  
Solvent Viscosity ◽  
Aggregation Induced Emission ◽  
Tddft Calculations ◽  
Probe Spectroscopy ◽  
Dft And Tddft Calculations

The combination of continuum and ultrafast pump–probe spectroscopy, in viscous and non-viscous environments, with DFT and TDDFT calculations, is effective in unraveling important features of the twisted intramolecular charge transfer mechanism in a new push–pull molecule that possesses aggregation induced emission properties.

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