Quantifying the Thermodynamics of Ligand Binding to CsPbBr₃ Quantum Dots.

ABSTRACT: Cesium lead halide perovskites are an emerging class of quantum dots (QDs) that have shown promise in a variety of applications; however, their properties are highly dependent on their surface chemistry. To this point, the thermodynamics of ligand binding remain unstudied. Herein, ¹ H NMR methods were used to quantify the thermodynamics of ligand exchange on CsPbBr₃ QDs. Both oleic acid and oleylamine native ligands dynamically interact with the CsPbBr₃ QD surface, having individual surface densities of 1.2-1.7 nm^-2 . 10-Undecenoic acid undergoes an exergonic exchange equilibrium with bound oleate (K_eq =1.97) at 25 °C while 10-undecenylphosphonic acid undergoes irreversible ligand exchange. Undec-10-en-1-amine exergonically exchanges w

SUBMITTER: Smock SR 

PROVIDER: S-EPMC6467082 | biostudies-literature | 2018 Sep

REPOSITORIES: biostudies-literature