scholarly journals Dynamic Behaviors of the Electron Donor-Acceptor Complex in its Lowest Excited Singlet State

1971 ◽  
Vol 44 (12) ◽  
pp. 3310-3316 ◽  
Author(s):  
Hiroshi Masuhara ◽  
Motoo Shimada ◽  
Nobuyuki Tsujino ◽  
Noboru Mataga
Keyword(s):  
Electron Donor ◽  
Singlet State ◽  
Excited Singlet State ◽  
Excited Singlet ◽  
Dynamic Behaviors ◽  
Acceptor Complex ◽  
Donor Acceptor

Dielectric switching of the nature of excited singlet state in a donor-acceptor-type polyfluorene copolymer

2010 ◽  
Vol 81 (20) ◽  
Author(s):  
Annamaria Petrozza ◽  
Frédéric Laquai ◽  
Ian A. Howard ◽  
Ji-Seon Kim ◽  
Richard H. Friend
Keyword(s):  
Singlet State ◽  
Excited Singlet State ◽  
Excited Singlet ◽  
Donor Acceptor

Einfiuss der Donator-Akzeptor-Wechselwirkung bei Stilbenen auf die Polarität im ersten angeregten Singulettzustand

1980 ◽  
Vol 35 (7) ◽  
pp. 777-778
Author(s):  
I. Gryczyński ◽  
D. Gloyna ◽  
A. Kawski
Keyword(s):  
Linear Correlation ◽  
Electric Dipole ◽  
Singlet State ◽  
Dipole Moments ◽  
Excited Singlet State ◽  
Excited Singlet ◽  
Electric Dipole Moments ◽  
Donor Acceptor

The electric dipole moments of some substituted stilbenes in the ground (μg) and the first excited singlet state (μe) have been determined and discussed in regard of the donor-acceptor- interactions. A linear correlation between the Hammett σp-constants and the values of μg, μe and Δμ = μe - μg for different substituted stilbenes was found.

Einfluß von Substituenten und polaren Lösungsmitteln auf die Deaktivierung des S1Zustandes bei Donator-Akzeptor-substituierten trans-Stilbenen/Influence of Substituents and Polar Solvents on the Deactivation of the First Excited Singlet of Donor-acceptor Substituted Trans-stilbenes

1980 ◽  
Vol 35 (12) ◽  
pp. 1411-1414 ◽  
Author(s):  
D. Gloyna ◽  
A. Kawski ◽  
I. Gryczyński
Keyword(s):  
Quantum Yield ◽  
Fluorescence Quantum Yield ◽  
Singlet State ◽  
Excited Singlet State ◽  
Excited Singlet ◽  
Polar Solvents ◽  
Effect Of Substituents ◽  
Nonpolar Solvents ◽  
Donor Acceptor ◽  
Influence Of Substituents

AbstractThe effect of substituents on the fluorescence quantum yield φf of trans-stilbenes (1) in dimethylformamide, acetonitrile, and n-propanol, as well as in n-heptane, is mainly due to radiationless deactivation. Contrary to n-heptane, the rate kd of radiationless deactivation in the above mentioned polar solvents for compounds 1 of similar structure is not a monotoneous function of the polarity of the first excited singlet state. The maximum of kd corresponds to compounds with medium polarity (1h, 1i). The effect of substituents on the fluorescence rate kfn in polar and nonpolar solvents is small compared to that on kd. In all solvents kfn drops with increasing polarity of the first excited singlet state.

The Effect of Substituents on the Polarity in the First Excited Singlet State of Some trans-Styryl-Methyl-Sulfones

1989 ◽  
Vol 44 (12) ◽  
pp. 1163-1166
Author(s):  
A. Kawski ◽  
A. Kubicki ◽  
J. Czajko
Keyword(s):  
Dipole Moment ◽  
Excited State ◽  
Electron Donor ◽  
Ground State ◽  
Singlet State ◽  
Excited Singlet State ◽  
Excited Singlet ◽  
Hammett Constant ◽  
Effect Of Substituents ◽  
Donor Power

Abstract The effect of substituents R (R=N(CH3)2, OCH3, CH3, H, Cl, Br, CN) on the polarity of trans-styryl-methyl-sulfones in the first excited singlet state is investigated. Linear relations are found between the dipole moment in the excited state, μe, and the Hammett constant, σp+ , and also between μe and the dipole moment in the ground state, μg. On increasing the electron-donor power of R, μe grows faster than μg.

The Gold Porphyrin First Excited Singlet State¶

2002 ◽  
Vol 76 (1) ◽  
pp. 47 ◽  
Author(s):  
Joakim Andréasson ◽  
Gerdenis Kodis ◽  
Su Lin ◽  
Ana L. Moore ◽  
Thomas A. Moore ◽  
...  
Keyword(s):  
Singlet State ◽  
Excited Singlet State ◽  
Excited Singlet

Metal-Free Photoinduced Hydroalkylation Cascade Enabled by an Electron-Donor-Acceptor Complex

2020 ◽  
Author(s):  
José Tiago Menezes Correia ◽  
Gustavo Piva da Silva ◽  
Camila Menezes Kisukuri ◽  
Elias André ◽  
Bruno Pires ◽  
...  
Keyword(s):  
Electron Donor ◽  
Functional Group ◽  
Photoexcited Electron ◽  
One Pot ◽  
Quaternary Centers ◽  
Metal Free ◽  
Acceptor Complex ◽  
Catalyst Free ◽  
Donor Acceptor ◽  
Radical Cascade

A metal- and catalyst-free photoinduced radical cascade hydroalkylation of 1,7-enynes has been disclosed. The process is triggered by a SET event involving a photoexcited electron-donor-aceptor complex between NHPI ester and Hantzsch ester, which decomposes to afford a tertiary radical that is readily trapped by the enyne. <a>The method provides an operationally simple, robust and step-economical approach to the construction of diversely functionalized dihydroquinolinones bearing quaternary-centers. A sequential one-pot hydroalkylation-isomerization approach is also allowed giving access to a family of quinolinones. A wide substrate scope and high functional group tolerance was observed in both approaches</a>.

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