Solute-solvent halogen bonding during adsorption on silver nanostructures

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• 作者：Donald A. Perry^a ; ^donp@uca.edu ; Taylor M. Razer^a ; ^{trazer1@cub.uca.edu} ; James S. Cordova^a ; ^{jsco40@yahoo.com} ; Elizabeth M. Schiefer^a ; ^{lizschiefer@gmail.com} ; TsungYen Chen^a ; ^{tchen1@cub.uca.edu} ; Katherine M. Primm^a ; ^{kprimm2@cub.uca.edu} ; Ashley M. Bonde^a ; ^{ashley_bonde@hotmail.com} ; Alexandru S. Biris^b ; ^{asbiris@ualr.edu}
• 关键词：4-Iodobenzoic acid ; 4-Iodobenzoate ; SEIRA ; SERS ; Carbon tetrachloride
• 刊名：Journal of Colloid and Interface Science
• 出版年：2012
• 期刊代码：125_00219797
• 类别：ch
• 出版时间：15 June, 2012
• 卷：376
• 期：1
• 页码：239-244
• 文件大小：660 K

摘要

We offer here evidence for halogen bonding induced by silver nanoparticles (SNPs) in a multilayer containing 4-iodobenzoate ion (4IBI) and CCl₄. SERS experiments show in the monolayer that CCl₄ does not adsorb and 4-iodobenzoic acid (4IBA) adsorbs as 4IBI. SEIRA experiments reveal that 4IBI forms in the multilayer during deposition from CCl₄ on SNPs. Further infrared experiments on clean BaF₂ prove that 4IBI formation caused by underlying SNPs was necessary for CCl₄ inclusion in a 4IBI multilayer. Several potential scenarios involving intermolecular attraction between CCl₄ and 4IBI are proposed to explain the results. Although halogen bonding involving solvents has been theoretically and experimentally demonstrated in solution phase chemistry, in bulk crystals, and at the monolayer level, here it is shown that halogen bonding interactions can also be significant in multilayer films. Results from this work will likely impact a range of applications across diverse fields where halogen bonding in thin films and nucleation chemistry are important.