The present invention relates to particles, useful for drug release detection, comprising:
- at least one luminescent metal complex of formula [Ln].[L], wherein:
- Ln is a lanthanide ion,
- L is an organic ligand comprising a hydrophilic unit with at least 6 chelating groups chosen from the group consisting of hydroxyl, carboxyl, optionally in the carboxylate form, carbonyl, ether, phosphonate, phosphinate, thiolate, amino and imino functions, and
- at least one drug comprising a conjugated aromatic system, wherein said drug is not covalently bonded to the metal complex,
said particle having a size comprised from 3 nm to 2 000 nm, and wherein the distribution of the metal complex and the drug within the particle is such that the mean distance between a drug molecule and a metal complex is less than 15 nm.
本发明涉及用于药物释放检测的微粒,包括
- 至少一种式[Ln].[L]的发光
金属复合物,其中:
- Ln 是
镧系离子、
- L 是由至少 6 个螯合基团组成的亲
水单元的有机
配体,这些螯合基团选自由羟基、羧基(可选
羧酸盐形式)、羰基、醚、
膦酸盐、
膦酸盐、
硫酸酯、
氨基和亚
氨基功能组成的组,以及
- 至少一种由共轭芳香系统组成的药物,其中所述药物未与
金属络合物共价键合、
所述颗粒的尺寸为 3 纳米至 2 000 纳米,其中
金属络合物和药物在颗粒内的分布使得药物分子与
金属络合物之间的平均距离小于 15 纳米。