H. Sakamoto et al., SILVER SELECTIVITY OF NOVEL MONOAZAPOLYTHIOETHER DERIVATIVES BEARING A HYDRAZONE GROUP IN THE SOLVENT-EXTRACTION, Chemistry Letters, (4), 1993, pp. 609-612
Novel acyclic and cyclic monoazapolythioether derivatives incorporatin
g a substituted hydrazone group were synthesized. The acyclic and the
cyclic monoazatetrathioether derivatives exhibited high Ag+ ion select
ivity in the extraction with 1,2-dichloroethane. The monoazatetrathioe
ther derivatives gave hypsochromic and bathochromic shifts in the visi
ble absorption spectra when extracted Ag+ ion from the aqueous phase o
f varying acidities into the organic phase.