Cooperative Gold Nanoparticle Stabilization by Acetylenic Phosphaalkenes
| Autor: | Marie-Pierre Santoni, Andreas Orthaber, Elisabet Öberg, Henrik Ottosson, Klaus Leifer, Rajeev Ahuja, Henrik Löfås, Andreas Wallner, Sascha Ott, S. Hassan M. Jafri, Anton Grigoriev |
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| Rok vydání: | 2015 |
| Předmět: |
Stereochemistry
education Nanoparticle acetylenic phosphaalkenes 010402 general chemistry 01 natural sciences Catalysis symbols.namesake chemistry.chemical_compound mental disorders 010405 organic chemistry Chemistry General Chemistry Combinatorial chemistry Communications Gold Nanoparticle Stabilization 0104 chemical sciences dynamic behavior ab initio studies Colloidal gold gold nanoparticles symbols Chemical equilibrium Raman spectroscopy psychological phenomena and processes Phosphine |
| Zdroj: | Angewandte Chemie (International Ed. in English) |
| ISSN: | 1433-7851 |
| DOI: | 10.1002/anie.201504834 |
| Popis: | Acetylenic phosphaalkenes (APAs) are used as a novel type of ligands for the stabilization of gold nanoparticles (AuNP). As demonstrated by a variety of experimental and analytical methods, both structural features of the APA, that is, the P=C as well as the C≡C units are essential for NP stabilization. The presence of intact APAs on the AuNP is demonstrated by surface-enhanced Raman spectroscopy (SERS), and first principle calculations indicate that bonding occurs most likely at defect sites on the Au surface. AuNP-bound APAs are in chemical equilibrium with free APAs in solution, leading to a dynamic behavior that can be explored for facile place-exchange reactions with other types of anchor groups such as thiols or more weakly binding phosphine ligands. |
| Databáze: | OpenAIRE |
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