Exciplex-exciplex energy transfer and annihilation in solid films of porphyrin-fullerene dyads

Journal of the American Chemical Society

Volumn 128, Issue 50, 2006, Pages 16036-16037

  Lehtivuori, Heli ^a   Lemmetyinen, Helge ^a   Tkachenko, Nikolai V ^a  

^a TAMPERE UNIVERSITY OF TECHNOLOGY   (Finland)

Author keywords

[No Author keywords available]

Indexed keywords

FULLERENE; PORPHYRIN;

ARTICLE; DEGRADATION; DENSITY; ENERGY ABSORPTION; ENERGY TRANSFER; EXCITATION; FILM; MOLECULAR INTERACTION;

EID: 33845597783     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja0662366     Document Type: Article

References (22)

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20. For LB films, the exciplex emission was sensitive to the type of matrix molecules used, e.g., octadecanoic acid or amine, and relatively less intense. Presumably the differences in local (micro) environment and following complete charge separation are responsible for the difference. A detailed investigation of the cause is on the way at present.
21. The annihilation is a two-particle reaction, and it strongly depends on the density of the excited states-at higher excitations, the relaxation is faster. Similar type of behavior was reported in refs 1b, 1d, 2a, 3b, and 4c for the singlet-singlet annihilation.
22. In LB films, the proportion is roughly the same despite the fact that the dyads are placed in octadecylamine matrix. This indicates that the dyads are arranged in clusters with structure similar to that in drop casted films.