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Cooperative Gold Nanoparticle Stabilization by Acetylenic Phosphaalkenes
Author(s) -
Orthaber Andreas,
Löfås Henrik,
Öberg Elisabet,
Grigoriev Anton,
Wallner Andreas,
Jafri S. Hassan M.,
Santoni MariePierre,
Ahuja Rajeev,
Leifer Klaus,
Ottosson Henrik,
Ott Sascha
Publication year - 2015
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201504834
Subject(s) - phosphine , raman spectroscopy , colloidal gold , chemistry , nanoparticle , surface enhanced raman spectroscopy , molecule , combinatorial chemistry , stereochemistry , nanotechnology , organic chemistry , materials science , raman scattering , catalysis , physics , optics
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 PC as well as the CC 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.