Frenkel Biexcitons in 1D J-aggregates

1995 ◽  
Vol 413 ◽  
Author(s):  
Frank C. Spano ◽  
Eric S. Manas
Keyword(s):  
Small Radius ◽  
Molecular Aggregates ◽  
Pump Probe ◽  
Exciton Transport ◽  
Exciton Interactions ◽  
J Aggregates ◽  
Optically Induced

ABSTRACTWe calculate the pump-probe spectrum of an ensemble of ID molecular aggregates, taking into account coherent exciton transport and exciton-exciton interactions. Comparison with recent experiments show that small radius biexcitons may be optically induced in PIC J-aggregates.

Theory of Pump-Probe Spectroscopy of Molecular J-Aggregates

J-Aggregates ◽  
1996 ◽  
pp. 111-160 ◽  
Author(s):  
Jasper Knoester ◽  
Frank C. Spano
Keyword(s):  
Pump Probe ◽  
J Aggregates ◽  
Probe Spectroscopy

Electronic absorption, MCD, and luminescence properties of porphyrin J-aggregates

2013 ◽  
Vol 17 (08n09) ◽  
pp. 703-711 ◽  
Author(s):  
Yuichi Kitagawa ◽  
Junji Hiromoto ◽  
Kazuyuki Ishii
Keyword(s):  
Electronic Absorption ◽  
Magnetic Circular Dichroism ◽  
Protonated Form ◽  
Red Shift ◽  
Energy Splitting ◽  
Absorption Bands ◽  
Exciton Interactions ◽  
J Aggregates ◽  
Fluorescence And Phosphorescence Spectra ◽  
Phosphorescence Spectra

In this paper, we have investigated electronic absorption, magnetic circular dichroism, fluorescence, and phosphorescence spectra for a protonated form of H 2 TPPS 4( H 4 TPPS 4) and the J-aggregates of H 4 TPPS 4. The J-aggregation induces a large red-shift in the B (Soret) and Q absorption bands, while the phosphorescence peaks of H 4 TPPS 4 and its J-aggregates are almost entirely similar. The large red-shift of the B-band is quantitatively explained by the exciton interactions. Thus, the exciton interactions in the J-aggregates are proposed as a useful approach to decrease the energy splitting between the fluorescent and phosphorescent states.

Coherent Mechanism of Exciton Transport in Disordered J-Aggregates

2009 ◽  
Vol 113 (29) ◽  
pp. 12883-12887 ◽  
Author(s):  
Alexander N. Lebedenko ◽  
Roman S. Grynyov ◽  
Gleb Ya. Guralchuk ◽  
Alexander V. Sorokin ◽  
Svetlana L. Yefimova ◽  
...  
Keyword(s):  
Exciton Transport ◽  
J Aggregates

Enhancement of exciton transport in porphyrin aggregate nanostructures by controlling the hierarchical self-assembly

Nanoscale ◽  
2018 ◽  
Vol 10 (35) ◽  
pp. 16438-16446 ◽  
Author(s):  
Taehee Kim ◽  
Sujin Ham ◽  
Sang Hyeon Lee ◽  
Yongseok Hong ◽  
Dongho Kim
Keyword(s):  
Fluorescence Microscopy ◽  
Self Assembly ◽  
Profile Analysis ◽  
Confocal Fluorescence Microscopy ◽  
Analysis Method ◽  
Emission Profile ◽  
Exciton Transport ◽  
Confocal Fluorescence ◽  
J Aggregates

Exciton transport in meso-tetra(4-sulfonatophenyl) porphyrin (TPPS) J-aggregates was directly imaged using the emission profile analysis method with confocal fluorescence microscopy.

Pump—probe spectroscopy and exciton dynamics of J aggregates at high pump intensities

1993 ◽  
Vol 211 (6) ◽  
pp. 511-515 ◽  
Author(s):  
Alan E. Johnson ◽  
Shigeichi Kumazaki ◽  
Keitaro Yoshihara
Keyword(s):  
Pump Probe ◽  
Exciton Dynamics ◽  
High Pump ◽  
J Aggregates ◽  
Probe Spectroscopy

SUB-5-fs REAL-TIME SPECTROSCOPY OF EXCITONIC SYSTEMS

2001 ◽  
Vol 15 (28n30) ◽  
pp. 3623-3627 ◽  
Author(s):  
TAKAYOSHI KOBAYASHI
Keyword(s):  
Conjugated Polymers ◽  
Real Time ◽  
Mode Coupling ◽  
Dynamic Mode ◽  
Pump Probe ◽  
Visible Laser ◽  
Probe Experiment ◽  
Coupling Dynamic ◽  
J Aggregates ◽  
Pump Probe Experiment

Pump-probe experiment was performed for spin-coated films of conjugated polymers (substituted polydiacetylene) and J-aggregates of a porphyrin derivative by using a sub-5fs visible laser. Real-time spectra were obtained for the systems and new dynamical processes have been observed, i.e. dynamic mode coupling, dynamic intensity borrowing.

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