Coordination of Quantum Dots in a Polar Solvent by Small-Molecule Imidazole Ligands
Coordination of Quantum Dots in a Polar Solvent by Small-Molecule Imidazole Ligands
复制标题
小分子咪唑配体在极性溶剂中配位量子点
DOI：
10.1021/acs.inorgchem.2c01494
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发表时间：
2022
影响因子：
4.6
通讯作者：
Greytak, Andrew B.
中科院分区：
文献类型：
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作者：
Jayaweera, Nuwanthaka P.;Dunlap, John H.;Ahmed, Fiaz;Larison, Taylor;Buzoglu Kurnaz, Leman;Stefik, Morgan;Pellechia, Perry J.;Fountain, Augustus W.;Greytak, Andrew B.
胶体量子点(QD)具有良好的可调谐光电性质，在生物成像和生物医学领域具有广泛的应用前景。本研究用一组含咪唑的小分子配体定量交换了油酸封端的闪锌矿CdSe/ZnS核/壳量子点的天然疏水配体环境。利用电感耦合等离子体发射光谱和核磁共振氢谱对三种不同的配体交换过程进行了鉴定和定量：油酸锌的Z型解离、咪唑的L缔合和油酸与氯离子的X型阴离子交换。
Colloidal quantum dots (QDs) are attractive fluorophores for bioimaging and biomedical applications because of their favorable and tunable optoelectronic properties. In this study, the native hydrophobic ligand environment of oleate-capped sphalerite CdSe/ZnS core/shell QDs was quantitatively exchanged with a set of imidazole-bearing small-molecule ligands. Inductively coupled plasma-optical emission spectroscopy and1H NMR were used to identify and quantify three different ligand exchange processes: Z-type dissociation of the Zn(oleate)2, L-type association of the imidazole, and X-type anionic exchange of oleate with Cl–, all of which contributed to the overall ligand exchange.