【摘要】 本文用模板合成的方法,以2,6—二乙酰吡啶和邻苯二胺作为起始物质,在钪、(Ⅱ)、钇(Ⅱ)离子的模板作用下,缩合得到了钪、钇的十八元六氮大环配合物,并对其红外和紫外光谱、摩尔电导及热稳定性等性质进行了讨论。更多还原

【Abstract】 Two novel coordination compounds of hexadentate nitrogen donor ma-crocycle, Sc(NO3)3 ·L·2H2O and Y(NO3)3·L·2H2O (L = C98H26N6 18-membered hexaaza macrocycle), have been obtained by the template condensation of 2,6-diacetyl pyridine with o-phenylene diamine in the presence of Sc(Ⅲ) and Y(Ⅲ) ions. Their properties of IR and UV spectra, thermal stability and molar conductance etc. have been studied.The IR spectra of two coordination compounds confirm the formation of the macrocyclic compound by the absence of the characteristic bands of carbonyl and amine groups in the starting materials and the appearance of a strong new peak vc-x at 1617-1625 cm-1.The UV spectra of Sc(NO3)3·L·2H2O and Y(NO3)3·L·2H2O in me-thanol solution exhibit three absorption bands at 209-213, 267-280 and 310-327nm. Absorption in this region may be assigned to the π-π transitions of the macrocyclic ligand.The TG and DTA studies show thar these coordination compounds exhibit a few exothermic peaks from 230℃ to 550℃, these heating effects correspounds to the oxidation of the macrocyclic compounds.The molar conductance data indicate that two coordination compounds belong to 1:2 type electrolyte in methanol solution.更多还原