Premium
Convenient Photochemical Synthesis of Silver‐Polyaminocyclodextrin Nanocomposites: The Role of the Light Source from a Mechanistic Viewpoint
Author(s) -
Russo Marco,
Chillura Martino Delia,
Caponetti Eugenio,
Lo Meo Paolo
Publication year - 2018
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201703098
Subject(s) - nanocomposite , photochemistry , fourier transform infrared spectroscopy , irradiation , materials science , electron transfer , selected area diffraction , chemical engineering , photoinduced electron transfer , light source , mechanism (biology) , nanotechnology , chemistry , transmission electron microscopy , optics , physics , nuclear physics , engineering , quantum mechanics
An investigation on the light‐driven reduction of the [Ag(NH 3 ) 2 ] + complex in the presence of polyaminocyclodextrins was carried out, in order to clarify the mechanism of the process. The role of the organic auxiliary as both the sacrificial reductant and the capping agent was positively assessed. Moreover, particular attention was paid to the role of the irradiation source. Experimental results indicate that a complex mechanism is involved in the formation of the nanocomposite, with a primary photoinduced single‐electron‐transfer process promoted by irradiation with green light, followed by a secondary chemical reduction process activated by NIR. Representative composites were characterized by means of FTIR, TEM and SAED techniques. The light‐driven approach proposed here appears an appealing “green”, bio‐friendly method for the synthesis of stable nanosized silver composites, in view of possible applications as antimicrobial agents.