Macrocycles synthétiques. I. Action du sodium sur les o, o'-polyméthylènedioxy-bis-(benzylidène-anilines)
作者:R. Jaunin、R. Holl
DOI:10.1002/hlca.19580410633
日期:——
Ethereal solutions of the dianils I, when added under conditions of high dilution to a suspension of sodium sand in ether, give macrocyclic compounds II (n = 2–6) besides variable amounts of primary amines VI, secondary amines VIII and resinous products.
N′-tetraacetic acid (H4bapta), in which the distance between the chelating functions is changed, have been synthesized. The structure–interaction relationships of their complexation behavior with alkalineearth metal ions are discussed from the viewpoint of their acidity constants and stability constants of their chelate-complexes.
sizes: 1.2 × 2.8 × 2.8 nm) was obtained by using one designed flexible Schiffbase ligand containing eight coordinationsites. The Schiffbase ligand exhibits a hexadentate η1:η2:η1:η1:η2:η1:μ4 coordination mode. The chromogenic Cd/L components are able to transfer energy to Nd(III), leading to the near-infrared (NIR) lanthanide emission of 1. The energy transfer efficiency (ηsens) is calculated to
triple-decker complexes with lead(II). The highest values of stability constant were found for lead(II) complexes of 21-membered derivatives. For the first time azomacrocycles bearing imidazole residue were immobilized on a porous glass. Obtained materials can act as lead(II) or copper(II) colorimetric optical sensors with color digital analysis as detection using simple portable devices.
通过带有咪唑或4-甲基咪唑残基的烃链连接的新重氮大环已经合成,收率令人满意(24-55%)。通过X射线分析和光谱方法( 1 H NMR、MS、FTIR)证实了大环化合物的结构。在乙腈和乙腈-水体系中进行了金属阳离子络合研究。研究发现偶氮大环与铅(II)形成三层络合物。21 元衍生物的铅 (II) 配合物的稳定性常数最高。首次将带有咪唑残基的偶氮大环固定在多孔玻璃上。获得的材料可以用作铅(II)或铜(II)比色光学传感器,并使用简单的便携式设备进行颜色数字分析作为检测。
Heilporn, S.; Broeders, F.; Daloze, D., Bulletin des Societes Chimiques Belges, 1994, vol. 103, # 7-8, p. 309 - 320
作者:Heilporn, S.、Broeders, F.、Daloze, D.、Braekman, J. C.、Boeynaems, J. M.