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Pillar[5]arene‐Mediated Synthesis of Gold Nanoparticles: Size Control and Sensing Capabilities
Author(s) -
MontesGarcía Verónica,
FernándezLópez Cristina,
Gómez Borja,
PérezJuste Ignacio,
GarcíaRío Luis,
LizMarzán Luis M.,
PérezJuste Jorge,
PastorizaSantos Isabel
Publication year - 2014
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201402073
Subject(s) - pyrene , nucleation , nanoparticle , molecule , supramolecular chemistry , chemistry , raman spectroscopy , pillar , colloidal gold , spectroscopy , adsorption , particle size , nanotechnology , chemical engineering , materials science , organic chemistry , physics , structural engineering , engineering , quantum mechanics , optics
We present a simple procedure for the synthesis of quasi‐spherical Au nanoparticles in a wide size range mediated by macrocyclic host molecules, ammonium pillar[5]arene (AP[5]A). The strategy is based on a seeded growth process in which the water‐soluble pillar[5]arene undergoes complexation of the Au salt through the ammonium groups, thereby avoiding Au nucleation, while acting as a stabilizer. The presence of the pillar[5]arene onto the Au nanoparticle particle surface is demonstrated by surface‐enhanced Raman scattering (SERS) spectroscopy, and the most probable conformation of the molecule when adsorbed on the Au nanoparticles surface is suggested on the basis of theoretical calculations. In addition, we analyze the host–guest interactions of the AP[5]A with 2‐naphthoic acid (2NA) by using 1 H NMR spectroscopy and the results are compared with theoretical calculations. Finally, the promising synergetic effects of combining supramolecular chemistry and metal nanoparticles are demonstrated through SERS detection in water of 2NA and a polycyclic aromatic hydrocarbon, pyrene (PYR).