Light-Assisted Synthesis of Silver and Gold Nanoparticles by New Benzophenone Derivatives

Overview

Journal ACS Omega

Publisher American Chemical Society

Specialty Chemistry

Date 2023 Jan 30

PMID 36713746

Authors

Abrar S Alnafisah

Elaf Alqrairy

Haja Tar

Fahad M Alminderej

Lotfi M Aroua

Bernadette Graff

Jacques Lalevee

Affiliations

Soon will be listed here.

Abstract

Benzophenone derivatives were evaluated as new photoinitiators in combination with triethylamine (TEA) and iodonium salt (Iod) for very rapid and efficient formation of metal nanoparticles in an organic solvent, by which silver and gold ions were reduced under light at 419 nm (photoreactor) with an irradiation intensity of 250 microwatts/cm. The new benzophenone derivatives combined with TEA/Iod salt showed good production of metal nanoparticles (Au and Ag) and a small size of nanoparticles of around 4-13 nm. The photochemical mechanisms for the production of initiating radicals were studied using cyclic voltammetry, where a negative Δ of around -1.96 eV was obtained, which made the process favorable. The obtained results proved the formation of amine and phenyl radicals, which led to the reduction of gold III chloride or silver ions to the gold and silver NPs. The UV-vis spectroscopy technique was used as a very beneficial tool for the surface plasmon resonance band detection of metal nanoparticles. To sum up the results, we have observed that nanoparticles (NPs) were distributed differently in different photoinitiator systems and the particle size also changed by changing the system of initiation. In comparison to the system alone, not only were the nanoparticles smaller but they were also generated within a shorter period of irradiation time for the system BP\Iod\TEA. Finally, the quenching process of benzophenone fluorescence by the gold and silver nanoparticles was investigated.

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