Chemistry Letters p. 1021 - 1022 (1980)
Update date:2022-08-11
Topics:
Shiga, Masanobu
Takagi, Makoto
Ueno, Keihei
Crown-type polyether azo dyes 1-3 were synthesized, and the ion-pair extraction of sodium and potassium ion was studied.The extraction behavior resembles those of benzo-type crown ethers, but changes on light illumination due to trans-cis isomerization of the dyes.The cis-form lacks the affinity to metal ion.
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(1957)
