Stilbazolium merocyanine dye determination in different solutions, concentrations and colloids using SERS

Pajchrowski, G; Abdali, Salim; Nørbygaard, Thomas

doi:10.1002/jrs.1616

Cited by 3 publications

(2 citation statements)

References 27 publications

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“…The experimental results are supported with DFT calculations. Earlier reports on the infrared reflection-absorption ( Itoh et al, 1992 ), resonance Raman intensity analysis ( Leng et al, 2004 ) and SERRS ( Tsukada et al, 1989 ; Mineo and Itoh, 1991 ; Pajchrowski et al, 2007 ) studies of MC have indicated the presence of trans -conformation on the metal surface, which is in agreement with this study. Thus, multi-faceted application of MCH + /MC in bio sciences, materials and chemistry has motivated the present study, with an aim to gain thorough understanding of its molecular level behavior on the nanostructured surface of SCFs.…”

Section: Introductionsupporting

confidence: 93%

Conformational Selectivity of Merocyanine on Nanostructured Silver Films: Surface Enhanced Resonance Raman Scattering (SERRS) and Density Functional Theoretical (DFT) Study

et al. 2022

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In this study, detailed structural and vibrational analysis of merocyanine has been investigated using Raman, surface enhanced Raman scattering (SERS) and surface-enhanced resonance Raman scattering (SERRS). The Raman, SERS and SERRS studies aided by density functional theoretical (DFT) calculations clearly established the prevalence of the trans- and cis-conformers of the protonated form of merocyanine (MCH+) in solid and acetonitrile solution. The binding characteristics of merocyanine adsorbed on nanostructured silver-coated films (SCFs) were investigated using excitation-dependent SERS, concentration-dependent SERRS and DFT studies. The conformers of merocyanine involved in the surface adsorption processes were recognized. The prominent marker bands observed at 1538 (ethylenic C=C stretch) and 1133 cm−1 (pyridinium C-N stretch) in the Raman spectrum of merocyanine in acetonitrile shifted to 1540 and 1126 cm−1, respectively on the nanostructured SCFs. The shift in the marker bands is associated with either the preferential binding of selective conformer or change in resonance equilibrium between the benzenoid and quinoid forms. The excitation wavelength dependent SERS spectrum infers that in addition to the major contribution from the electromagnetic enhancement, chemical (resonance) effect leads to the amplification of the 1540 cm−1 band. The concentration-dependent SERRS study showed maximum enhancement for the nanostructured SCFs functionalized with 1 μM concentration of merocyanine, indicative of monolayer coverage. For lower concentrations of merocyanine, the SERRS signal intensity reduced without any alteration in the peak positions. The SERRS study thus, revealed sub-nanomolar (0.1 nM) sensing of merocyanine using nanostructured SCFs with the analytical enhancement factor (AEF) of ∼ 1010 for the 1126 cm−1 and 1540 cm−1 Raman bands for MC concentration of 0.1 nM. In this study, combination of SERRS and DFT have clearly established the predominance of trans-MCH+ on the nanostructured silver surface with minor contribution from cis-MCH+, which remain exclusively bound to the surface via the phenoxyl ring O atom. This conformational surface selectivity of geometrical isomers of merocyanine using nanostructured surfaces can be further explored for energy efficient and economical separation of geometrical isomers.

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Section: Introductionsupporting

confidence: 93%

Conformational Selectivity of Merocyanine on Nanostructured Silver Films: Surface Enhanced Resonance Raman Scattering (SERRS) and Density Functional Theoretical (DFT) Study

et al. 2022

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“…Pajchrowski et al 8 reported on using SERS to obtain Raman spectra of merocyanine dye at low concentrations (ca. 10 5 -10 8 M) in an attempt to find a new approach for further investigations of this dye.…”

Section: Applications Of Sersmentioning

confidence: 99%

Recent advances in linear and nonlinear Raman spectroscopy II

Kiefer

2008

J Raman Spectroscopy

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Following the first review on recent advances in linear and nonlinear Raman spectroscopy, the present review summarizes papers mainly published in the Journal of Raman Spectroscopy during 2007. This serves to give a fast overview of recent advances in this research field as well as to provide readers of this journal a quick introduction to the various subfields of Raman spectroscopy. It also reflects the current research interests of the Raman community. Similar reviews of highly active areas of Raman spectroscopy will appear in future issues of this journal.

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Fabrication of SERS-active Au@Au@Ag double shell nanoparticles for low-abundance pigment detection

Wei

Huang

2021

Chinese Journal of Chemical Physics

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Stilbazolium merocyanine dye determination in different solutions, concentrations and colloids using SERS

Cited by 3 publications

References 27 publications

Conformational Selectivity of Merocyanine on Nanostructured Silver Films: Surface Enhanced Resonance Raman Scattering (SERRS) and Density Functional Theoretical (DFT) Study

Conformational Selectivity of Merocyanine on Nanostructured Silver Films: Surface Enhanced Resonance Raman Scattering (SERRS) and Density Functional Theoretical (DFT) Study

Recent advances in linear and nonlinear Raman spectroscopy II

Fabrication of SERS-active Au@Au@Ag double shell nanoparticles for low-abundance pigment detection

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