Sulfur-Capped Germanium Nanocrystals: Facile Inorganic Ligand Exchange
| Autor: | Diogenes Placencia, Edward E. Foos, Denisse Soto, Michael H. Davis, Janice E. Boercker, Andrew T. Kerr, Nathan A. Banek |
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| Rok vydání: | 2017 |
| Předmět: |
Ligand
Inorganic chemistry chemistry.chemical_element Germanium 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Sulfur 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials General Energy chemistry Nanocrystal X-ray photoelectron spectroscopy Transmission electron microscopy Density functional theory Physical and Theoretical Chemistry Fourier transform infrared spectroscopy 0210 nano-technology |
| Zdroj: | The Journal of Physical Chemistry C. 121:22597-22606 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/acs.jpcc.7b04045 |
| Popis: | The development of applications for germanium nanocrystals has been hindered by the limited availability of synthetic methods coupled with poorly understood ligand-exchange chemistry. Herein we describe the synthesis of germanium nanocrystals and ligand exchange experiments designed to establish facile routes toward ligand replacement and, consequently, layers that are amenable to charge-transfer. After assessing thiols, carboxylates, and dithiocarbamates, sulfur dissolved in 1-ocatadecene was determined to be the most amenable to ligand exchange, with over 95% of the initial alkylamine ligand replaced as determined by Fourier transform infrared spectroscopy (FTIR). These results were in good agreement with density functional theory calculations showing a strong preference for Ge–S bonding. The materials were fully characterized via powder X-ray diffraction, FTIR, transmission electron microscopy, and X-ray and UV photoelectron spectroscopy. This new ligand exchange procedure provides a possible route tow... |
| Databáze: | OpenAIRE |
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