Cooperative Gold Nanoparticle Stabilization by Acetylenic Phosphaalkenes |
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| Authors: | Dr. Andreas Orthaber Dr. Henrik Löfås Dr. Elisabet Öberg Dr. Anton Grigoriev Dr. Andreas Wallner Dr. S. Hassan M. Jafri Dr. Marie‐Pierre Santoni Prof. Dr. Rajeev Ahuja Prof. Dr. Klaus Leifer Prof. Dr. Henrik Ottosson Prof. Dr. Sascha Ott |
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| Affiliation: | 1. Department of Chemistry/?ngstr?m Laboratories, Uppsala University, Box 523, 75120 Uppsala (Sweden);2. Department of Physics and Astronomy, Uppsala University, Box 516, 75120 Uppsala (Sweden);3. Department of Chemistry – BMC, Uppsala University, Box 576, 75123 Uppsala (Sweden);4. Department of Engineering Sciences, ?ngstr?m Laboratories, Uppsala University, Box 534, 75121 Uppsala (Sweden) |
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| Abstract: | 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. |
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| Keywords: | ab initio studies acetylenic phosphaalkenes dynamic behavior gold nanoparticles |
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