Effect of the Hydrogen Bond on Photochemical Synthesis of Silver Nanoparticles

Autor:	Lei Liu, Yang Yang, Guang-hua Ren, Panwang Zhou, Xu Dali, Feng-jiao Zhao, Rui-ling Zhang, Ke-Li Han
Rok vydání:	2015
Předmět:	Electron transfer chemistry.chemical_compound Ketyl Chemistry Hydrogen bond Intermolecular force Benzophenone Physical and Theoretical Chemistry Photochemistry Hydrogen atom abstraction Redox Silver nanoparticle
Zdroj:	The Journal of Physical Chemistry A. 119:12579-12585
ISSN:	1520-5215 1089-5639
Popis:	The effect of a hydrogen bond on the photochemical synthesis of silver nanoparticles has been investigated via experimental and theoretical methods. In a benzophenone system, the photochemical synthesis process includes two steps, which are that hydrogen abstraction reaction and the following reduction reaction. We found that for the first step, an intermolecular hydrogen bond enhances the proton transfer. The efficiency of hydrogen abstraction increases with the hydrogen bond strength. For the second step, the hydrogen-bonded ketyl radical complex shows higher reducibility than the ketyl radical. The inductively coupled plasma-optical emission spectroscopy (ICP-OES) measurement exhibits a 2.49 times higher yield of silver nanoparticles in the hydrogen bond ketyl radical complex system than that for the ketyl radical system. Theoretical calculations show that the hydrogen bond accelerates electron transfer from the ketyl radical to the silver ion by raising the SOMO energy of the ketyl radical; thus, the SOMO-LUMO interaction is more favorable.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eb389ffdd7e3a28fcb149c12bfe76512 https://doi.org/10.1021/acs.jpca.5b09949 Zobrazit plný text záznamu