title: Cooperative Gold Nanoparticle Stabilization by Acetylenic Phosphaalkenes.
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.
authors.affiliation: Department of Chemistry/Ångström Laboratories, Uppsala University, Box 523, 75120 Uppsala (Sweden). andreas.orthaber@kemi.uu.se.
authors.forename: Andreas
authors.initials: A
authors.lastname: Orthaber
authors.affiliation: Department of Physics and Astronomy, Uppsala University, Box 516, 75120 Uppsala (Sweden).
authors.forename: Henrik
authors.initials: H
authors.lastname: Löfås
authors.affiliation: Department of Chemistry/Ångström Laboratories, Uppsala University, Box 523, 75120 Uppsala (Sweden).
authors.forename: Elisabet
authors.initials: E
authors.lastname: Öberg
authors.affiliation: Department of Physics and Astronomy, Uppsala University, Box 516, 75120 Uppsala (Sweden).
authors.forename: Anton
authors.initials: A
authors.lastname: Grigoriev
authors.affiliation: Department of Chemistry - BMC, Uppsala University, Box 576, 75123 Uppsala (Sweden).
authors.forename: Andreas
authors.initials: A
authors.lastname: Wallner
authors.affiliation: Department of Engineering Sciences, Ångström Laboratories, Uppsala University, Box 534, 75121 Uppsala (Sweden).
authors.forename: S Hassan M
authors.initials: SH
authors.lastname: Jafri
authors.affiliation: Department of Chemistry/Ångström Laboratories, Uppsala University, Box 523, 75120 Uppsala (Sweden).
authors.forename: Marie-Pierre
authors.initials: MP
authors.lastname: Santoni
authors.affiliation: Department of Physics and Astronomy, Uppsala University, Box 516, 75120 Uppsala (Sweden).
authors.forename: Rajeev
authors.initials: R
authors.lastname: Ahuja
authors.affiliation: Department of Engineering Sciences, Ångström Laboratories, Uppsala University, Box 534, 75121 Uppsala (Sweden).
authors.forename: Klaus
authors.initials: K
authors.lastname: Leifer
authors.affiliation: Department of Chemistry - BMC, Uppsala University, Box 576, 75123 Uppsala (Sweden).
authors.forename: Henrik
authors.initials: H
authors.lastname: Ottosson
authors.affiliation: Department of Chemistry/Ångström Laboratories, Uppsala University, Box 523, 75120 Uppsala (Sweden). sascha.ott@kemi.uu.se.
authors.forename: Sascha
authors.initials: S
authors.lastname: Ott
keywords: ab initio studies; acetylenic phosphaalkenes; dynamic behavior; gold nanoparticles