Radiative and nonradiative energy transfer between CO and pyrene involving higher excited states: A Spectroscopic Analysis

1998 ◽  
Vol 102 (2) ◽  
pp. 249-256
Author(s):  
Murthy S. Gudipati ◽  
Martin Kalb
Keyword(s):  
Energy Transfer ◽  
Excited States ◽  
Spectroscopic Analysis ◽  
Nonradiative Energy Transfer ◽  
Higher Excited States

Photochemical and photophysical behaviour of porphyrins and phthalocyanines irradiated with violet or ultraviolet light

2001 ◽  
Vol 05 (01) ◽  
pp. 77-86 ◽  
Author(s):  
KATSUMI TOKUMARU
Keyword(s):  
Electron Transfer ◽  
Energy Transfer ◽  
Excited States ◽  
Ultraviolet Light ◽  
Recent Progress ◽  
Femtosecond Spectroscopy ◽  
Transfer Energy ◽  
Absorption Bands ◽  
Characteristic Emission ◽  
Higher Excited States

Photochemical irradiation of porphyrins or phthalocyanines with violet or ultraviolet light absorbed by their second or higher absorption bands populates their higher excited states. These higher excited states generally dissipate very rapidly, but, competing with such rapid deactivation, often show unique behaviour different from the lowest excited states populated under visible light irradiation of the first absorption band, namely wavelength-dependent reactions or emission. The higher excited states often exhibit characteristic emission and enhanced reactivity in electron transfer, energy transfer and so on, competing with rapid deactivation. This paper attempts to summarize our work, perfomed particularly by means of femtosecond spectroscopy, and recent progress in this area.

Recent Applications of Nonradiative Energy Transfer to Polymer Studies

1993 ◽  
Vol 58 (10) ◽  
pp. 2266-2271 ◽  
Author(s):  
Herbert Morawetz
Keyword(s):  
Energy Transfer ◽  
Polymer Chain ◽  
Cluster Formation ◽  
Nonradiative Energy Transfer ◽  
Molecular Cluster ◽  
Fluorescent Labels ◽  
Latex Particles ◽  
Polymer Latex

Recent studies of polymers in solution and in bulk by energy transfer between two fluorescent labels are reviewed. Such studies are concerned with the equilibrium and dynamics of polymer chain expansion, molecular cluster formation in solution, the miscibility of polymers in bulk, and the interdiffusion of polymer latex particles.

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