Disclosed herein are nanostructures comprising manganese ions incorporated in a polymeric framework comprising at least five geminal bisphosphonate groups, wherein the geminal bisphosphonate groups independently of each other are incorporated as -R3R4C(P=O(OR2)(OR2))2, wherein R1 and R2 are independently selected from the group consisting of a negative charge, H, alkyl and aryl, and wherein at least one of R3 and R4 is a group connected to the polymeric framework with the proviso that when only one of R3 and R4 is such a connected group, the other of R3 and R4 is either a group being able to connect to the polymeric framework, or the residue of such a group, or selected from the group consisting of H, OH, OR5 and R5, wherein R5 is a lower alkyl. Disclosed are also methods for producing such nanostructures, compositions comprising such nanostructures and use of such nanostructures, i.a. as MRI contrasting agents.
本文披露了一种包含
锰离子的纳米结构,所述纳米结构包括至少五个伽那
双膦酸酯基团的聚合物框架,其中这些伽那
双膦酸酯基团独立地被结合为-R3R4C(P=O(OR2)(OR2))2,其中R1和R2分别选自负电荷、H、烷基和芳基组成的组,且R3和R4中至少一个是连接到聚合物框架的基团,但有一个例外,即当R3和R4中仅有一个是这样的连接基团时,另一个则是能够连接到聚合物框架的基团,或者是这样一个基团的残基,或者选自H、OH、OR5和R5组成的组,其中R5是较低的烷基。还披露了制备这种纳米结构的方法、包含这种纳米结构的组合物以及这种纳米结构的用途,例如作为磁共振成像对比剂。