Gold nanoshells with magnetic cores and an urea-based receptor for SERS sensing of fluoride anions: experimental and computational study

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F23%3A43927306" target="_blank" >RIV/60461373:22340/23:43927306 - isvavai.cz</a>

Result on the web

<a href="https://pubs.rsc.org/en/Content/ArticleLanding/2023/AN/D3AN00625E" target="_blank" >https://pubs.rsc.org/en/Content/ArticleLanding/2023/AN/D3AN00625E</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/D3AN00625E" target="_blank" >10.1039/D3AN00625E</a>

Result language

angličtina

Original language name

Gold nanoshells with magnetic cores and an urea-based receptor for SERS sensing of fluoride anions: experimental and computational study

Original language description

The study demonstrates that a combination of plasmonic nanostructures and artificial receptors can be applied for sensing of small molecular species. Gold nanoshells containing magnetic cores are used as the SERS-active substrate, which opens the way for the development of multimodal contrast agents with applicability extended to sensing or for the separation of analytes by magnetic solid-phase extraction. Disubstituted ureas forming hydrogen-bonded complexes with certain anions can be employed as their molecular sensors. In this case study, the gold nanoshells with silica-coated Mn-Zn ferrite cores are prepared by a multistep procedure. The nanoshells are co-functionalized with the N-(4-mercaptophenyl)-N’-(4-nitrophenyl)urea sensor, synthesized directly on the gold surface, and with 4-nitrothiophenol, which is adopted as an internal standard. SERS measurements are carried out with acetonitrile solutions of tetrabutylammonium fluoride (Bu4NF) over a concentration range of 10-10–10-1 mol L-1. The spectral response of the sensor is dependent on the fluoride concentration in the range 10-5–10-1 mol L-1. To investigate more the SERS mechanism, a model sensor, N-(4‑bromophenyl)‑N’-(4‑nitrophenyl)urea, was synthesized and used in Raman spectroscopy with solutions of Bu4NF, up to the molar ratio of 1:20. The spectra and the interactions between the sensors and fluoride anions are also studied by extensive DFT computations.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10406 - Analytical chemistry

Project

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Continuities

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Analyst

ISSN

0003-2654

e-ISSN

1364-5528

Volume of the periodical

neuveden

Issue of the periodical within the volume

20

Country of publishing house

GB - UNITED KINGDOM

Number of pages

14

Pages from-to

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UT code for WoS article

001075347400001

EID of the result in the Scopus database

2-s2.0-85171422397