Dynamics and Mechanism of the Exciplex Formation between Cu(TMpy-P4) and DNA Model Compounds Revealed by Time-Resolved Transient Absorption and Resonance Raman Spectroscopies

1995 ◽  
Vol 99 (15) ◽  
pp. 5732-5741 ◽  
Author(s):  
Sergei G. Kruglik ◽  
Victor A. Galievsky ◽  
Vladimir S. Chirvony ◽  
Pavel A. Apanasevich ◽  
Vladimir V. Ermolenkov ◽  
...  
Keyword(s):  
Transient Absorption ◽  
Resonance Raman ◽  
Model Compounds ◽  
Time Resolved ◽  
Exciplex Formation

Ultrafast Heme Dynamics in Ferrous versus Ferric CytochromecStudied by Time-Resolved Resonance Raman and Transient Absorption Spectroscopy

2006 ◽  
Vol 110 (25) ◽  
pp. 12766-12781 ◽  
Author(s):  
Michel Negrerie ◽  
Simona Cianetti ◽  
Marten H. Vos ◽  
Jean-Louis Martin ◽  
Sergei G. Kruglik
Keyword(s):  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Resonance Raman ◽  
Transient Absorption Spectroscopy ◽  
Time Resolved

Time-Resolved Resonance Raman and Transient Absorption Studies on Water-Soluble Copper(II) Porphyrins

1996 ◽  
Vol 100 (8) ◽  
pp. 3075-3083 ◽  
Author(s):  
Sae Chae Jeoung ◽  
Dongho Kim ◽  
Dae Won Cho ◽  
Minjoong Yoon
Keyword(s):  
Transient Absorption ◽  
Resonance Raman ◽  
Water Soluble ◽  
Time Resolved ◽  
Absorption Studies

scholarly journals Photophysical relaxation mechanism of excited phtalimide compounds

2019 ◽  
Vol 58 (4) ◽  
Author(s):  
Ignas Čiplys ◽  
Ryoji Orita ◽  
Shinji Ando ◽  
Vidmantas Gulbinas
Keyword(s):  
Transient Absorption ◽  
Relaxation Mechanism ◽  
Quantum Yields ◽  
Solvent Mixtures ◽  
Electronic Components ◽  
Time Resolved Fluorescence ◽  
Model Compounds ◽  
Time Resolved ◽  
Fluorescent Materials ◽  
Intramolecular Rotation

Fluorescent polymers are one of the most desired materials for making novel flexible electronic components or spectral converters. Favourable properties of polyimides (PIs) make them a potentially attractive class of polymers but, unfortunately, they generally show a very weak fluorescence. As a result, there has been a large amount of work directed towards finding the reasons behind the lack of fluorescence of PIs and making their new fluorescent variants. Amine-substituted phtalimides are heavily used as model compounds for fluorescent PIs. In this work we have examined the photophysical relaxation mechanism of such two phtalimides (3Pi and 3Pyr) that were previously discovered to have low quantum yields of fluorescence. Our aim was to find the reason behind this lack of fluorescence and to suggest ways to make these properties more attractive. We have investigated the photophysics of phtalimides by time resolved fluorescence and ultrafast transient absorption techniques in solvent mixtures of different viscosities. Our results demonstrate that intramolecular rotation is a crucial process that opens up an alternative relaxation pathway to fluorescence in phtalimides, which has to be suppressed for designing more fluorescent materials.

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