title: Novel Multilayer Nanostructured Materials for Recognition of Polycyclic Aromatic Sulfur Pollutants and Express Analysis of Fuel Quality and Environmental Health by Surface Enhanced Raman Spectroscopy.
abstract: A novel concept of advanced SERS (surface enhanced Raman spectroscopy) planar sensors is suggested for fast analysis of sulfur-containing hazardous oil components and persistent pollutants. The main advantage of the proposed sensors is the utilization of an additional preconcentrating layer of optically transparent chitosan gel, which is chemically modified with appropriate π-acceptor compounds to selectively form charge-transfer complexes (CTCs) at the interface with nanostructured silver coatings. The CTCs shift absorption bands of polycyclic aromatic sulfur heterocycles (PASHs) and other important analytes in a controllable way and thus provide a surplus enhancement of vibration modes due to resonant Raman scattering. This novel indicator system provides multiplex determination of PASHs in different forms in a small volume of oil without any tedious sample pretreatment steps. This approach opens new possibilities of increasing either spectral and concentration sensitivity or specificity of SERS-based sensors, allowing for new developments in the fields of ecology, advanced fuel analysis, and other prospective applications.
authors.affiliation: Faculty of Chemistry, Moscow State University , Lenin Hills, 1-3, Moscow 119991, Russia.
authors.forename: Olga E
authors.identifier: http://orcid.org/0000-0002-2776-4743
authors.initials: OE
authors.lastname: Eremina
authors.affiliation: Faculty of Materials Science, Moscow State University , Lenin Hills, 1-73, Moscow 119991, Russia.
authors.forename: Alexander V
authors.initials: AV
authors.lastname: Sidorov
authors.affiliation: Faculty of Chemistry, Moscow State University , Lenin Hills, 1-3, Moscow 119991, Russia.
authors.forename: Tatyana N
authors.initials: TN
authors.lastname: Shekhovtsova
authors.affiliation: Faculty of Chemistry, Moscow State University , Lenin Hills, 1-3, Moscow 119991, Russia.|Faculty of Materials Science, Moscow State University , Lenin Hills, 1-73, Moscow 119991, Russia.|Institute of General and Inorganic Chemistry , Leninskii prosp., 31, Moscow 119071, Russia.
authors.forename: Eugene A
authors.initials: EA
authors.lastname: Goodilin
authors.affiliation: Faculty of Chemistry, Moscow State University , Lenin Hills, 1-3, Moscow 119991, Russia.
authors.forename: Irina A
authors.initials: IA
authors.lastname: Veselova
keywords: charge-transfer complexes; dibenzothiophene; oil quality markers; polycyclic aromatic sulfur heterocycles; surface enhanced Raman scattering