Excited-State Dynamics of Tetraphenylethylene:  Ultrafast Stokes Shift, Isomerization, and Charge Separation

1997 ◽  
Vol 101 (51) ◽  
pp. 9828-9836 ◽  
Author(s):  
Robert W. J. Zijlstra ◽  
Piet Th. van Duijnen ◽  
Ben L. Feringa ◽  
Thomas Steffen ◽  
Koos Duppen ◽  
...  
Keyword(s):  
Excited State ◽  
Charge Separation ◽  
Stokes Shift ◽  
Excited State Dynamics

scholarly journals Photoinduced Interactions in a Pyrene-Calix[4]arene-Perylene Bisimide Dye System: Probing Ground-State Conformations with Excited-State Dynamics of Charge Separation and Recombination

2009 ◽  
Vol 113 (42) ◽  
pp. 18358-18368 ◽  
Author(s):  
Nguyen Vân Anh ◽  
Felix Schlosser ◽  
Michiel M. Groeneveld ◽  
Ivo H. M. van Stokkum ◽  
Frank Würthner ◽  
...  
Keyword(s):  
Excited State ◽  
Ground State ◽  
Charge Separation ◽  
Excited State Dynamics ◽  
Perylene Bisimide

Intramolecular fluorescence quenching in aminocoumarines. Identification of an excited state with full charge separation

1985 ◽  
Vol 63 (7) ◽  
pp. 1649-1653 ◽  
Author(s):  
Wolfgang Rettig ◽  
André Klock
Keyword(s):  
Dipole Moment ◽  
Excited State ◽  
Charge Transfer ◽  
Fluorescence Quenching ◽  
Charge Separation ◽  
Intramolecular Charge Transfer ◽  
Stokes Shift ◽  
Twisted Intramolecular Charge Transfer ◽  
Full Charge

The fluorescence of 6-aminocoumarine (A6C) is very weak and anomalously redshifted as compared to its 7-substituted analogues 4-methyl-7-aminocoumarine (A7C) and 4-methyl-7-diethylaminocoumarine (DEA7C). The solvatochromic redshift in homologous alcohols is much stronger for A6C, pointing to an increased dipole moment of the emitting state. A twisted intramolecular charge transfer (TICT) state with full charge separation is made responsible for this emission. This is rationalized by molecules-in-molecules calculations. The strong Stokes shift in n-hexane and in ethanol glass at 77 K suggests that A6C emits from a TICT state even under these conditions.

scholarly journals Excited-State Dynamics of Hybrid Multichromophoric Systems: Toward an Excitation Wavelength Control of the Charge Separation Pathways

2009 ◽  
Vol 113 (29) ◽  
pp. 8202-8212 ◽  
Author(s):  
Natalie Banerji ◽  
Guillaume Duvanel ◽  
Alejandro Perez-Velasco ◽  
Santanu Maity ◽  
Naomi Sakai ◽  
...  
Keyword(s):  
Excited State ◽  
Charge Separation ◽  
Excitation Wavelength ◽  
Excited State Dynamics ◽  
Wavelength Control

scholarly journals Guest and solvent modulated photo-driven charge separation and triplet generation in a perylene bisimide cyclophane

2016 ◽  
Vol 7 (8) ◽  
pp. 5428-5434 ◽  
Author(s):  
Peter Spenst ◽  
Ryan M. Young ◽  
Michael R. Wasielewski ◽  
Frank Würthner
Keyword(s):  
Excited State ◽  
Charge Separation ◽  
Excited State Dynamics ◽  
Perylene Bisimide

The modulation of the excited state dynamics in a perylene bisimide cyclophane was achieved by solvent and guest variation.

Excited state dynamics study of the self-trapped exciton formation in silicon nanosheets

2018 ◽  
Vol 20 (46) ◽  
pp. 29299-29305
Author(s):  
Naeem Ullah ◽  
Shunwei Chen ◽  
Ruiqin Zhang
Keyword(s):  
Excited State ◽  
Stokes Shift ◽  
The Self ◽  
Excited State Dynamics ◽  
Large Stokes Shift ◽  
Strong Localization

After excitation to S1 (1), the exciton takes ∼450–850 femtoseconds to relax into the self-trapped (ST) state (2) with the occurrence of strong localization and a large Stokes shift, due to the significant stretching of the Si–Si bonds.

Excited-state dynamics of a molecular dyad with two orthogonally-oriented fluorophores

2018 ◽  
Vol 20 (48) ◽  
pp. 30219-30230 ◽  
Author(s):  
Romain Letrun ◽  
Bernhard Lang ◽  
Oleksandr Yushchenko ◽  
Roland Wilcken ◽  
Denis Svechkarev ◽  
...  
Keyword(s):  
Excited State ◽  
Charge Separation ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Excited State Dynamics

Intramolecular charge separation and enhanced spin orbit coupling explain the weak fluorescence of a T-shaped dyad comprising two strong fluorophores.

meso-Arylethynyl subporphyrins as efficient and tunable photo-induced electron transfer units

2017 ◽  
Vol 21 (02) ◽  
pp. 152-157 ◽  
Author(s):  
Won-Young Cha ◽  
Juwon Oh ◽  
Masaaki Kitano ◽  
Atsuhiro Osuka ◽  
Dongho Kim
Keyword(s):  
Electron Transfer ◽  
Excited State ◽  
Fluorescence Quenching ◽  
Charge Separation ◽  
Solvent Polarity ◽  
Enhanced Fluorescence ◽  
Excited State Dynamics ◽  
Photo Induced Electron Transfer

Excited state dynamics of meso-arylethynyl-substituted subporphyrins can be tuned by 4-substituent at the arylethynyl group and solvent polarity. In polar acetonitrile, phenylethynyl subporphyrin 1 exhibited enhanced fluorescence, while (4-dimethylaminophenyl)ethynyl subporphyrin 2 showed red-shifted fluorescence from its charge-separated state and (4-nitrophenyl)ethynyl subporphyrin 3 displayed efficient fluorescence quenching due to charge separation.

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