A series of multicoordinating and multifunctional ligands optimized for the surface-functionalization of luminescent quantum dots (QDs) and gold nanoparticles (AuNPs) alike is disclosed. An L-aspartic acid precursor is modified with functionality, through simple peptide coupling chemistry, one or two lipoic acid (LA) groups and poly(ethylene glycol) (PEG) moieties in the same ligand. These ligands were combined with a new photoligation strategy to yield hydrophilic and reactive QDs that are colloidally stable over a broad range of conditions, including storage at nanomolar concentration and under ambient conditions.
本文介绍了一系列经过优化的多配位和多功能
配体,可用于表面功能化发光量子点(QDs)和
金纳米颗粒(AuNPs)。通过简单的肽偶联
化学,将
L-天冬氨酸前体修饰为具有功能性的
配体,其中包含一到两个
硫辛酸(
LA)基团和聚
乙二醇(P
EG)基团。将这些
配体与新的光
化学连接策略相结合,可以产生亲
水性和反应性的QDs,在广泛的条件下具有胶体稳定性,包括在纳摩尔浓度和常温下储存。