Pillar[5]arene‐Mediated Synthesis of Gold Nanoparticles: Size Control and Sensing Capabilities. Issue 27 (30th May 2014)

• Record Type: Journal Article
• Authors: Montes‐García, Verónica; Fernández‐López, Cristina; Gómez, Borja; Pérez‐Juste, Ignacio; García‐Río, Luis; Liz‐Marzán, Luis M.; Pérez‐Juste, Jorge; Pastoriza‐Santos, Isabel
• Is Part Of: Chemistry. Volume 20:Issue 27(2014)
• Page Start: 8404
• Page End: 8409
• Publication Date: 2014-05-30
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201402073
• Languages: English
• ISSNs: 0947-6539

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>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 ¹H 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).</p> </abstract>