Cation-dependent photochromic properties of novel ditopic receptors
O. A. Fedorova**, Y. V. Fedorov, E. N. Andrjukhina, S. P. Gromov, and
M. V. Alfimov
Photochemistry Center of Russian Academy of Sciences,
Novatorov str., 7a,
Moscow, 119421, Russia
Abstract: Novel crown-containing 2-styrylbenzothiazoles
were prepared to obtain optical ditopic receptors that can bind alkaline-earth
metal cations by a crown ether fragment and could serve as host for
the heavy metal cations and proton owing to the presence of the heterocyclic
part. Photochemical transformations of the ditopic receptors depend
on the type of metal cations present in solution. They include trans–cis-isomerization,
[2+2]-cycloaddition, and electrocyclic reaction.
* Lectures presented at the XIXth IUPAC Symposium on
Photochemistry, Budapest, Hungary, 14�19 July 2002. Other presentations
are published in this issue, pp.999�1090.
**Corresponding author.
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