Synthesis, colloidal stability and 64Cu labeling of iron oxide nanoparticles bearing different macrocyclic ligands
作者:José A. Barreto、Madlen Matterna、Bim Graham、Holger Stephan、Leone Spiccia
DOI:10.1039/c1nj20558g
日期:——
stability and 64Cu2+ labeling of magnetite nanoparticles (NPs) coated with different macrocycles is reported, together with the stability of the resulting radioisotope-labeled NPs to transchelation by the competing ligand cyclam, and their stability in blood serum. Three macrocycles, 1,4-bis(2-pyridylmethyl)-1,4,7-triazacyclononane (dmptacn), 1,4,8,11-tetraazacyclotetradecane (cyclam) and 1,4,7,10-tetraazacyclododecane
报道了包覆有不同大环的磁铁矿纳米颗粒(NP)的合成,溶液稳定性和64 Cu 2+标记,以及所得放射性同位素标记的NP通过竞争配体进行螯合的稳定性。仙客来,以及它们在血清中的稳定性。三个大周期1,4-双(2-吡啶基甲基)-1,4,7-三氮杂环壬烷 (dmptacn), 1,4,8,11-四氮杂环十四烷 (仙客来) 和 1,4,7,10-四氮杂环十二烷 (循环), 和 3-氨基丙基三乙氧基硅烷被用来修饰磁铁矿纳米颗粒。通过使相应的3-(3-(三乙氧基甲硅烷氧基)丙氧基)丙-2-醇衍生物与NPs反应,高效率地将配体共价连接至NPs表面。根据透射电子显微镜(TEM),未涂覆的磁铁矿NP和大环官能化的同类物的平均直径为6至7 nm。NP在0.05 M水溶液中形成稳定的胶体悬浮液2-(N-吗啉代)乙磺酸(MES)缓冲液,由较大的聚集体组成,平均水力学尺寸约为200 nm。带有大环的NP可以有效地用64