Electrochemiluminescence of Phenanthrene-d10: A Possible Case of Efficient Triplet–Triplet Annihilation

1975 ◽  
Vol 53 (1) ◽  
pp. 76-78 ◽  
Author(s):  
N. Periasamy ◽  
K. S. V. Santhanam
Keyword(s):  
Electron Transfer ◽  
Transfer Reaction ◽  
Singlet State ◽  
Electron Transfer Reaction ◽  
Excited Singlet State ◽  
Excited Singlet ◽  
Triplet Triplet Annihilation

Electrochemiluminescence (e.c.1.) of mixed phenanthrene(Ph)-d10-oxidant and Ph-h10-oxidant systems have been studied. Emission from excited singlet state of Ph-d10 or Ph-h10 is observed. On the basis of energetics of the electron transfer reaction, triplet-triplet annihilation is postulated to give the excited singlet state of Ph. Comparison of these results with photoluminescence of Ph-d10, shows efficient triplet–triplet annihilation occurs in e.c.1.

Heavy-atom effects on the excited singlet-state electron-transfer reaction

1991 ◽  
Vol 95 (1) ◽  
pp. 38-42 ◽  
Author(s):  
Koichi Kikuchi ◽  
Masato Hoshi ◽  
Taeko Niwa ◽  
Yasutake Takahashi ◽  
Tsutomu Miyashi
Keyword(s):  
Electron Transfer ◽  
Transfer Reaction ◽  
Singlet State ◽  
Heavy Atom ◽  
Electron Transfer Reaction ◽  
Excited Singlet State ◽  
Excited Singlet ◽  
State Electron

Photochemistry of Nitracrine and its Analogues: Acridine Derivatives as Electron Donors

1984 ◽  
Vol 39 (2) ◽  
pp. 195-200 ◽  
Author(s):  
J. Biedrzycki ◽  
J. Błażejowski ◽  
J. Szychliński ◽  
A. Ledòchowski
Keyword(s):  
Electron Transfer ◽  
Excited State ◽  
Fluorescence Quenching ◽  
Triplet State ◽  
Uv Radiation ◽  
Electron Acceptor ◽  
Singlet State ◽  
Electron Donors ◽  
Excited Singlet State ◽  
Excited Singlet

Studies on the electron transfer in the excited state from electron donors: acridine, 9- aminoacridine and its derivatives, including nitracrine and its isomers, to CCl4 as a suitable electron acceptor, were undertaken. UV radiation (λ= 366 nm), absorbed only by acridine bases, generates CI- ions. The fluorescence quenching measurements indicate that no interaction appears between molecules of acridine bases in the excited singlet state and CCl4 molecule. A scheme of photochemical processes is proposed which assumes that the triplet state of the base molecule is the reactive one.

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