Synthesis of Ag+-Selective Dipalladium(II) Metallohost Based on O-Alkyloxime Bis(N2SO) Ligands
摘要:
Novel bis(N2SO) ligands 2a (= H4L2a) and 2b (= H4L2b) comprising O-alkyloxime, thiophenol, and phenol moieties were synthesized. The complexation of H4L2a and H4L2b with palladium(II) acetate afforded the dinuclear metallohosts [L2aPd2] and [L2bPd2], which have a recognition site consisting of two sulfur and four oxygen donor atoms. The metallohost [L2bPd2] strongly binds Ag+ to give [(L2bPd2)2Ag]+, whereas no detectable interaction between [L2bPd2] and hard metal cations (Na+, Ca2+, Y3+, La3+, and Lu3+) was observed.