Colloidally Prepared 3-Mercaptopropionic Acid Capped Lead Sulfide Quantum Dots

被引：49

作者：

Reinhart, Chase C. ^{[1
]}

Johansson, Erik ^{[1
]}

机构：

[1] Portland State Univ, Dept Chem, Portland, OR 97201 USA

来源：

CHEMISTRY OF MATERIALS | 2015年 / 27卷 / 21期

关键词：

MAGNETIC-RESONANCE-SPECTROSCOPY; CDS NANOCRYSTAL FILMS; SOLAR-CELLS; PBS NANOCRYSTALS; LIGAND-EXCHANGE; AQUEOUS-SOLUTIONS; LIGHT ENERGY; SHORT-CHAIN; SOLIDS; PHOTOVOLTAICS;

D O I：

10.1021/acs.chemmater.5b02786

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Colloidally suspended PbS quantum dots stabilized with 3-mercaptopropionic acid (3-MPA) were prepared via solution ligand exchange. The optical properties of the as-prepared colloidal QDs were investigated by absorption and emission spectroscopy. The 3-MPA exchanged QDs luminesced with intensities comparable to oleate capped PbS QDs. The nanocrystal ligand chemistry was investigated by solution H-1 Nuclear Magnetic Resonance (NMR) spectroscopy, which indicated a dynamic ligand shell undergoing rapid exchange. Optical properties of the QD colloid evolved over time and were correlated to the oxidative conversion of 3-MPA into dithiodipropionic acid (DTDPA) in the presence of dimethyl sulfoxide (DMSO) observed by NMR.

引用

页码：7313 / 7320

页数：8

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