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Mechanism for photoisomerization of an olefin in the presence of electron acceptors as studied by magnetic field effects

✍ Scribed by Hirochika Sakuragi; Ryoichi Nakagaki; Takahisa Oguchi; Tatsuo Arai; Katsumi Tokumaru; Saburo Nagakura

Publisher
Elsevier Science
Year
1987
Tongue
English
Weight
479 KB
Volume
135
Category
Article
ISSN
0009-2614

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✦ Synopsis

An external magnetic field is found to retard the photoisomerization of tram-3,3-dimethyl-1-( 2-naphthyl)-1-butene (t-DMNB) in degassed acetonitrile in the presence of electron acceptors. From this and other observations, the precursor of the isomerization is indicated to be the oletin triplet arising from intersystem crossing of a singlet radical pair consisting of a GDMNB cation and an acceptor anion, identified by nanosecond flash photolysis.

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To summarize the experimental observations: it was found possible in the given case to verify the validity of eqn. (1). For a specific example we were successful in verifying the applicability of our method to the study of adsorption phenomena occurring during electrode reactions.