Ultrafast Relaxation Dynamics of 5,10,15,20-meso-Tetrakis Pentafluorophenyl Porphyrin Studied by Fluorescence Up-Conversion and Transient Absorption Spectroscopy

2015 ◽  
Vol 119 (8) ◽  
pp. 1267-1278 ◽  
Author(s):  
P. Hemant Kumar ◽  
Yeduru Venkatesh ◽  
Doddi Siva ◽  
B. Ramakrishna ◽  
Prakriti Ranjan Bangal
Keyword(s):  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Transient Absorption Spectroscopy ◽  
Relaxation Dynamics ◽  
Ultrafast Relaxation

Electronic relaxation pathways of the biologically relevant pterin chromophore

2017 ◽  
Vol 19 (20) ◽  
pp. 12720-12729 ◽  
Author(s):  
R. M. DiScipio ◽  
R. Y. Santiago ◽  
D. Taylor ◽  
C. E. Crespo-Hernández
Keyword(s):  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Relaxation Mechanism ◽  
Transient Absorption Spectroscopy ◽  
Electronic Relaxation ◽  
Biologically Relevant ◽  
Ultrafast Relaxation ◽  
First Time

Femtosecond-to-microsecond transient absorption spectroscopy is used to report the ultrafast relaxation mechanism of 2-amino-1H-pteridin-4-one (pterin) for the first time.

scholarly journals Carrier relaxation dynamics in defect states of epitaxial GaN/AlN/Si using ultrafast transient absorption spectroscopy

RSC Advances ◽  
2015 ◽  
Vol 5 (102) ◽  
pp. 83969-83975 ◽  
Author(s):  
Palak Dugar ◽  
Mahesh Kumar ◽  
Shibin Krishna T. C. ◽  
Neha Aggarwal ◽  
Govind Gupta
Keyword(s):  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Transient Absorption Spectroscopy ◽  
Relaxation Dynamics ◽  
Defect States ◽  
Carrier Relaxation ◽  
Ultrafast Transient Absorption ◽  
Defect Levels ◽  
Carrier Relaxation Dynamics ◽  
Ultrafast Transient Absorption Spectroscopy

Carrier relaxation dynamics through the defect levels in an epitaxial GaN/AlN/Si have been analysed on the femto–picosecond timescale, using ultrafast-transient absorption spectroscopy.

Ultrafast excited state relaxation dynamics in a heteroleptic Ir(iii) complex, fac-Ir(ppy)2(ppz), revealed by femtosecond X-ray transient absorption spectroscopy

2021 ◽  
Author(s):  
Jungkweon Choi ◽  
Mina Ahn ◽  
Jae Hyuk Lee ◽  
Doo-Sik Ahn ◽  
Hosung Ki ◽  
...  
Keyword(s):  
Excited State ◽  
Time Constant ◽  
Absorption Spectroscopy ◽  
Internal Conversion ◽  
Transient Absorption ◽  
Transient Absorption Spectroscopy ◽  
Relaxation Dynamics ◽  
X Ray ◽  
Forbidden Transition ◽  
Calculation Results

The experimental and calculation results demonstrate that the 3MLppzCT state generated by the spin-forbidden transition rapidly relaxes to 3MLppyCT through internal conversion process with a time constant of ∼450 fs.

Electronic relaxation dynamics of PCDA-PDA studied by transient absorption spectroscopy

2016 ◽  
Vol 18 (33) ◽  
pp. 23096-23104 ◽  
Author(s):  
Joonyoung F. Joung ◽  
Junwoo Baek ◽  
Youngseo Kim ◽  
Songyi Lee ◽  
Myung Hwa Kim ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Transient Absorption Spectroscopy ◽  
Electronic Relaxation ◽  
Relaxation Dynamics ◽  
Femtosecond Transient Absorption ◽  
Femtosecond Transient Absorption Spectroscopy ◽  
Thermochromic Properties

Spectroscopic signature of thermochromic properties of PCDA-PDA is revealed by femtosecond transient absorption spectroscopy.

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