Dr. Joshua N. Lea, Dr. Heather J. Montgomery, Dr. Yikai Xu, Prof. Steven E. J. Bell, Dr. Lorna Ashton, Dr. Nicholas C. Fletcher
{"title":"SERS Detection of Hg2+ using Rhenium Carbonyl Labelled Nanoparticle Films","authors":"Dr. Joshua N. Lea, Dr. Heather J. Montgomery, Dr. Yikai Xu, Prof. Steven E. J. Bell, Dr. Lorna Ashton, Dr. Nicholas C. Fletcher","doi":"10.1002/cmtd.202300032","DOIUrl":null,"url":null,"abstract":"<p>Modified silver nanoparticles with a self-assembled disulfide functionalized 2,2'-bipyridine (L1 and L2) monolayer, and the corresponding rhenium complex [Re(L2)(CO)<sub>3</sub>Br] are shown to provide a method to position the nanoparticles at a water/dichloromethane interface forming a lustrous metal-like-liquid film (MeLLF) with a unique SERS response. The film formed using L2 showed divergent behaviour in the presence of a range of metal ions whilst bound to the surface. [Re(L)(CO)<sub>3</sub>Br] (where L=2,2'-bipyridine, L1 and L2) in solution demonstrates a selective interaction with Hg<sup>2+</sup>, observed by UV-vis, emission and <sup>1</sup>H NMR spectroscopy, attributed to abstraction of the bromide. This interaction was demonstrated by subtle changes in the characteristic Raman Re-CO stretch at 510 cm<sup>−1</sup> both with the MeLLF, and when the film is immobilized in a PVA surface-exposed-nano-sheet (SENS). The work provides proof of concept that the organometallic complexes can be employed as “labels” to generate SERS-active nanoparticle films that possess detection capabilities.</p>","PeriodicalId":72562,"journal":{"name":"Chemistry methods : new approaches to solving problems in chemistry","volume":null,"pages":null},"PeriodicalIF":6.1000,"publicationDate":"2023-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cmtd.202300032","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Chemistry methods : new approaches to solving problems in chemistry","FirstCategoryId":"1085","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/cmtd.202300032","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Modified silver nanoparticles with a self-assembled disulfide functionalized 2,2'-bipyridine (L1 and L2) monolayer, and the corresponding rhenium complex [Re(L2)(CO)3Br] are shown to provide a method to position the nanoparticles at a water/dichloromethane interface forming a lustrous metal-like-liquid film (MeLLF) with a unique SERS response. The film formed using L2 showed divergent behaviour in the presence of a range of metal ions whilst bound to the surface. [Re(L)(CO)3Br] (where L=2,2'-bipyridine, L1 and L2) in solution demonstrates a selective interaction with Hg2+, observed by UV-vis, emission and 1H NMR spectroscopy, attributed to abstraction of the bromide. This interaction was demonstrated by subtle changes in the characteristic Raman Re-CO stretch at 510 cm−1 both with the MeLLF, and when the film is immobilized in a PVA surface-exposed-nano-sheet (SENS). The work provides proof of concept that the organometallic complexes can be employed as “labels” to generate SERS-active nanoparticle films that possess detection capabilities.