作者:N. I. Gorshkov、A. A. Lumpov、A. E. Miroslavov、D. N. Suglobov
DOI:10.1007/s11137-005-0045-2
日期:2005.1
Complexation of 99, 99m Tc(CO) 3 + organometallic fragment with 2 + 1 chelating systems was studied. HPLC analysis showed that the dithiocarbamate complexes of 99m Tc are stronger than their xanthate, acetylacetonate, and γ-methoxycarbonylmethylacetylacetonate analogs. To block the third vacancy in the technetium coordination sphere, we studied thiols, thioethers, primary and secondary amines, hydroxyl ion, imidazole, phosphines, and isocyanides. As determined by 99m Tc NMR spectroscopy, the mixed-ligand complexes Tc(CO)3(DTC)L (DTC is dithiocarbamate and L is isocyanide, imidazole, and phosphine) are the most stable to the histidine challenge reaction. HPLC analysis showed that, among these 2 + 1 systems, only the DTC-isonitrile system forms a single complex with 99m Tc(CO) 3 + . The minimal dithiocarbamate-isocyanide concentration providing complete binding of 99m Tc(CO) 3 + is 10−4 M.
研究了 99、99m Tc(CO) 3 + 有机金属片段与 2 + 1 螯合体系的络合。高效液相色谱分析显示,99m Tc 的二硫代氨基甲酸盐络合物比黄原酸盐、乙酰丙酮酸盐和γ-甲氧羰基甲基乙酰丙酮酸盐类似物更强。为了阻止锝配位球中的第三个空位,我们研究了硫醇、硫醚、伯胺和仲胺、羟基离子、咪唑、膦和异氰酸酯。根据 99m Tc NMR 光谱测定,混合配体配合物 Tc(CO)3(DTC)L(DTC 为二硫代氨基甲酸酯,L 为异氰酸酯、咪唑和膦类)对组氨酸挑战反应最稳定。高效液相色谱分析显示,在这些 2 + 1 系统中,只有 DTC- 异腈系统与 99m Tc(CO) 3 + 形成单一复合物。能与 99m Tc(CO) 3 + 完全结合的最小二硫代氨基甲酸-异氰酸酯浓度为 10-4 M。