Highly efficient exciplex formation via radical ion pair recombination in X-irradiated alkane solutions for luminophores with short fluorescence lifetimes

2014 ◽  
Vol 13 (8) ◽  
pp. 1169-1179 ◽  
Author(s):  
Anatoly R. Melnikov ◽  
Evgeny V. Kalneus ◽  
Valeri V. Korolev ◽  
Igor G. Dranov ◽  
Alexander I. Kruppa ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Emission Band ◽  
Field Effect ◽  
Magnetic Field Effect ◽  
Ion Pair ◽  
Fluorescence Lifetimes ◽  
Exciplex Formation ◽  
Highly Efficient ◽  
Exciplex Emission ◽  
X Irradiation

X-irradiation of an alkane solution of N,N-dimethylaniline and diphenylacetylene (τf = 8 ps) produces an exciplex and yields a magnetic field effect of 20% in the exciplex emission band.

Estimation of the Fraction of Spin-Correlated Radical Ion Pairs in Irradiated Alkanes using Magnetosensitive Recombination Luminescence from Exciplexes Generated upon Recombination of a Probe Pair

2017 ◽  
Vol 231 (2) ◽  
Author(s):  
Anatoly R. Melnikov ◽  
Vladimir N. Verkhovlyuk ◽  
Evgeny V. Kalneus ◽  
Valeri V. Korolev ◽  
Vsevolod I. Borovkov ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Emission Band ◽  
Ion Pairs ◽  
Magnetic Field Effect ◽  
Chemical Characterization ◽  
Magnetic Field Effects ◽  
Recombination Luminescence ◽  
Exciplex Formation ◽  
Cyclic Alkanes ◽  
Exciplex Emission

AbstractWe suggest a convenient probe exciplex system for studies in radiation spin chemistry based on a novel acceptor-substituted diphenylacetylene, 1-(phenylethynyl)-4-(trifluoromethyl)benzene that has a very short fluorescence lifetime (<200 ps) and low quantum yield (0.01) of intrinsic emission, provides efficient electron capture in alkanes and efficient exciplex formation upon recombination in pair with DMA radical cation, while exhibiting a shifted to red exciplex emission band as compared to the parent system DMA – diphenylacetylene. After chemical, luminescent, radiation and spin-chemical characterization of the new system we used the magnitude of magnetic field effect in its exciplex emission band for experimental estimation of the fraction of spin-correlated radical ion pairs under X-irradiation with upper energy cutoff 40 keV in a set of 11 alkanes. For linear and branched alkanes magnetic field effects and the corresponding fractions are approximately 19–20% and 0.28, while for cyclic alkanes they are lower at 16–17% and 0.22, respectively.

scholarly journals Enhancement of magnetic field effect in Ru(bpy)32+/MV2+ system by Ru(bpy)32+-Ag+ exciplex formation

2000 ◽  
Vol 316 (5-6) ◽  
pp. 411-418 ◽  
Author(s):  
Lajos Fodor ◽  
Attila Horváth ◽  
Karsten A. Hötzer ◽  
Stefan Walbert ◽  
Ulrich E. Steiner
Keyword(s):  
Magnetic Field ◽  
Field Effect ◽  
Magnetic Field Effect ◽  
Exciplex Formation

Magnetic field effect on ion-pair transfer in ruby. Cross relaxations and resonant transfer

1984 ◽  
Vol 31-32 ◽  
pp. 768-770 ◽  
Author(s):  
M. Montagna ◽  
L. Gonzo ◽  
O. Pilla ◽  
G. Viliani ◽  
E. Duval ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Field Effect ◽  
Magnetic Field Effect ◽  
Ion Pair ◽  
Pair Transfer
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