Femtosecond time-resolved absorption anisotropy spectroscopy on 9,9′-bianthryl: Detection of partial intramolecular charge transfer in polar and nonpolar solvents

2009 ◽  
Vol 130 (1) ◽  
pp. 014501 ◽  
Author(s):  
Tomohisa Takaya ◽  
Hiro-o Hamaguchi ◽  
Koichi Iwata
Keyword(s):  
Charge Transfer ◽  
Intramolecular Charge Transfer ◽  
Time Resolved ◽  
Nonpolar Solvents

Photoinduced energy and charge transfer in a bis(triphenylamine)–BODIPY–C60 artificial photosynthetic system

RSC Advances ◽  
2016 ◽  
Vol 6 (62) ◽  
pp. 57293-57305 ◽  
Author(s):  
Jian-Yong Liu ◽  
Xue-Ni Hou ◽  
Ye Tian ◽  
Lizhi Jiang ◽  
Shuiquan Deng ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Steady State ◽  
Spectroscopic Techniques ◽  
Time Resolved ◽  
Photosynthetic System ◽  
Transfer Processes ◽  
Nonpolar Solvents ◽  
System P ◽  
Artificial Photosynthetic

The bis(triphenylamine)–BODIPY–C60 artificial photosynthetic system has been prepared and studied for its photoinduced transfer processes in polar and nonpolar solvents using various steady-state and time-resolved spectroscopic techniques.

Time-resolved resonance Raman spectra of the intramolecular charge transfer state of DMABN

2000 ◽  
Vol 322 (5) ◽  
pp. 395-400 ◽  
Author(s):  
W.M. Kwok ◽  
C. Ma ◽  
P. Matousek ◽  
A.W. Parker ◽  
D. Phillips ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Raman Spectra ◽  
Intramolecular Charge Transfer ◽  
Resonance Raman ◽  
Charge Transfer State ◽  
Time Resolved ◽  
Resonance Raman Spectra ◽  
Transfer State

scholarly journals Twisted Intramolecular Charge Transfer State of a “Push-Pull” Emitter

2020 ◽  
Vol 21 (21) ◽  
pp. 7999
Author(s):  
Sebok Lee ◽  
Myungsam Jen ◽  
Yoonsoo Pang
Keyword(s):  
Excited State ◽  
Charge Transfer ◽  
Raman Spectra ◽  
Time Constant ◽  
Density Functional ◽  
Intramolecular Charge Transfer ◽  
Chloroform Solution ◽  
Functional Theory ◽  
Time Resolved ◽  
Dimethylamino Group

The excited state Raman spectra of 4-dicyanomethylene-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran (DCM) in the locally-excited (LE) and the intramolecular charge transfer (ICT) states have been separately measured by time-resolved stimulated Raman spectroscopy. In a polar dimethylsulfoxide solution, the ultrafast ICT of DCM with a time constant of 1.0 ps was observed in addition to the vibrational relaxation in the ICT state of 4–7 ps. On the other hand, the energy of the ICT state of DCM becomes higher than that of the LE state in a less polar chloroform solution, where the initially-photoexcited ICT state with the LE state shows the ultrafast internal conversion to the LE state with a time constant of 300 fs. The excited-state Raman spectra of the LE and ICT state of DCM showed several major vibrational modes of DCM in the LE and ICT conformer states coexisting in the excited state. Comparing to the time-dependent density functional theory simulations and the experimental results of similar push-pull type molecules, a twisted geometry of the dimethylamino group is suggested for the structure of DCM in the S1/ICT state.

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