263900-61-4Relevant articles and documents
Coordination behaviors of a 23-membered NO4S2-macrocycle: Mononuclear silver(I) complex and conformational isomers of tetranuclear bis(macrocycle) mercury(II) complexes exhibiting exo- and endo/exocyclic coordination modes
Shin, Mingyeong,Ju, Huiyeong,Habata, Yoichi,Lee, Shim Sung
, p. 749 - 755 (2018/07/29)
A ditopic 23-membered NO4S2-macrocycle (L) incorporating both semi-rigid and flexible binding sites was synthesized and its silver(I) and mercury(II) complexes exhibiting different stoichiometries and coordination modes were prepared. First, silver(I) perchlorate reacts with L to afford an endocyclic mononuclear complex [Ag(L)]ClO4 (1) in which the silver(I) ion locates at the semi-rigid binding site in the cavity. The solution study for the silver(I) complexation via the 1H NMR titration agrees with the corresponding solid state data that show the endo-mode. Interestingly, the reaction of L with HgI2 led to the isolation of two conformational isomers with a tetranuclear bis(macrocycle) composition, [(exoHgLI2)2(μ-Hg2I4)] (2a) and [(endoHgLI2)2(μ-Hg2I4)] (2b), which are dominated by the coordination modes of L toward the mercury(II) center. In both conformers, two exocyclic mercury(II) complex units (exoHgLI2)2 in 2a or two endocyclic complex units [(endoHgLI2)2 in 2b are linked by tetraiododimercury(II) core (μ-Hg2I4) to give a 4:2 (metal-to-ligand) stoichiometry. Based on the packing structures and high temperature experiment, the intermolecular interactions might be responsible for the formation of 2a and 2b which are kinetically and thermodynamic controlled, respectively.
Thiaoxaaza-macrocyclic chromoionophores as mercury(II) sensors: Synthesis and color modulation
Lee, Hayan,Lee, Shim Sung
scheme or table, p. 1393 - 1396 (2009/09/25)
Azo-coupled macrocyclic chromoionophores incorporating benzene (L 1) and pyridine (L2) subunits were synthesized, respectively. In a cation-induced color change experiment, both receptors showed Hg2+ selectivity. However,