SERS detection and comprehensive study of <i>p</i>-nitrophenol: towards pesticide sensing

Hostert, Leandro; Blanc, Christophe; Zarbin, Aldo J. G.; Anglaret, Éric; Orth, Elisa S.

doi:10.1039/d0nj05933a

Cited by 12 publications

(13 citation statements)

References 29 publications

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“…The SERS results were in agreement with the second possibility, as at high concentrations of 4-NP (10 –3 and 10 –4 M), SERS spectra show characteristic bands at 858, 1270, 1330, 1486, and 1580 cm –1 (Figure ). The band at 858 cm –1 represents the bending mode of the nitro group. , The band at 1330 cm –1 is assigned to the symmetric stretching of the nitro group, while the band at 1270 cm –1 is attributable to a ring deformation mixed with the stretching mode of the nitro group. , The band at 1486 cm –1 represents the bending mode of C–H . The band at 1580 cm –1 is assigned to the stretching mode of the ring. , However, the SERS intensity is much lower than that of CAP at the same concentration.…”

Section: Resultsmentioning

confidence: 98%

“…The band at 858 cm –1 represents the bending mode of the nitro group. , The band at 1330 cm –1 is assigned to the symmetric stretching of the nitro group, while the band at 1270 cm –1 is attributable to a ring deformation mixed with the stretching mode of the nitro group. , The band at 1486 cm –1 represents the bending mode of C–H . The band at 1580 cm –1 is assigned to the stretching mode of the ring. , However, the SERS intensity is much lower than that of CAP at the same concentration. These peaks disappear at the concentration of 10 –5 M. Similar to the experiments on FZD, the SERS measurements of 4-NP were also repeated 3 times, revealing the same results (Figure ).…”

Section: Resultsmentioning

confidence: 98%

“…39 The band at 1580 cm −1 is assigned to the stretching mode of the ring. 38,39 However, the SERS intensity is much lower than that of CAP at the same concentration. These peaks disappear at the concentration of 10 −5 M. Similar to the experiments on FZD, the SERS measurements of 4-NP were also repeated 3 times, revealing the same results (Figure 12).…”

Section: Confirmation For the Effects Of Homo−lumo Energy Levels Of T...mentioning

confidence: 95%

“…The band at 858 cm −1 represents the bending mode of the nitro group. 38,39 The band at 1330 cm −1 is assigned to the symmetric stretching of the nitro group, while the band at 1270 cm −1 is attributable to a ring deformation mixed with the stretching mode of the nitro group. 38,39 The band at 1486 cm −1 represents the bending mode of C−H.…”

Section: Confirmation For the Effects Of Homo−lumo Energy Levels Of T...mentioning

confidence: 99%

“…38,39 The band at 1330 cm −1 is assigned to the symmetric stretching of the nitro group, while the band at 1270 cm −1 is attributable to a ring deformation mixed with the stretching mode of the nitro group. 38,39 The band at 1486 cm −1 represents the bending mode of C−H. 39 The band at 1580 cm −1 is assigned to the stretching mode of the ring.…”

Section: Confirmation For the Effects Of Homo−lumo Energy Levels Of T...mentioning

confidence: 99%

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Silver Nanoparticles-Based SERS Platform towards Detecting Chloramphenicol and Amoxicillin: An Experimental Insight into the Role of HOMO–LUMO Energy Levels of the Analyte in the SERS Signal and Charge Transfer Process

et al. 2022

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Great influences of the lowest unoccupied molecular orbital (LUMO) and highest occupied molecular orbital (HOMO) energy levels of the analyte and their alignments compared to the Fermi level of the substrate on the charge transfer (CT) process, and consequently, on the surface-enhanced Raman scattering (SERS) phenomenon have been described via theoretical calculations. To provide experimental evidence, in this study, two antibiotics, chloramphenicol (CAP) and amoxicillin (AMX), were investigated as analytes in SERS sensors based on electrochemically synthesized colloidal silver nanoparticles (e-AgNPs) as the substrate. Despite the same experimental condition, similarities in analyte structure, and in the ability of absorbing onto e-AgNPs, the detection of the two antibiotics showed obvious distinction. While CAP was able to be detected using e-AgNP-based SERS sensors at concentrations down to 1.2 × 10 −9 M, there were no characteristic peaks observed in the SERS spectra of AMX even at a high concentration of 10 −3 M. The LUMO and HOMO energy levels of the two analytes were measured using electrochemical cyclic voltammetry. The obtained results showed that the LUMO levels of both analytes were higher than the Fermi level of Ag, and the LUMO level of AMX was higher than that of CAP. The larger gap between the LUMO level of AMX and the Fermi level of Ag might have prevented the metal-to-molecule CT process, which is related to the Raman signal enhancement in both chemical and electromagnetic mechanisms. In contrast, the smaller energy gap in the case of CAP might have allowed the transfer of hot electrons from the Fermi level of the e-AgNPs to the LUMO level of the analyte. Therefore, CAP could experience an SERS effect on the e-AgNPs under the excitation of a 785 nm laser source, while AMX could not. The hypothesis was then confirmed using three other organic compounds, including furazolidone, 4-nitrophenol, and tricyclazole. The results revealed a clear correlation between the LUMO level of the analytes and their SERS signals.

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 98%

Section: Confirmation For the Effects Of Homo−lumo Energy Levels Of T...mentioning

confidence: 95%

Section: Confirmation For the Effects Of Homo−lumo Energy Levels Of T...mentioning

confidence: 99%

Section: Confirmation For the Effects Of Homo−lumo Energy Levels Of T...mentioning

confidence: 99%

See 3 more Smart Citations

Silver Nanoparticles-Based SERS Platform towards Detecting Chloramphenicol and Amoxicillin: An Experimental Insight into the Role of HOMO–LUMO Energy Levels of the Analyte in the SERS Signal and Charge Transfer Process

et al. 2022

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SERS performance of cubic-shaped gold nanoparticles for environmental monitoring

et al. 2022

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Nanomaterials in assaying of pollutants by surface-enhanced Raman spectroscopy

Mahadev,

Kavitha

2024

Nanomaterials in Environmental Analysis

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SERS detection and comprehensive study of p-nitrophenol: towards pesticide sensing

Abstract: Pesticide sensing is an important object of study due to its increasing use worldwide. Herein, we report a SERS study of 4-nitrophenol (PNP), which is product of neutralization processes of...

Cited by 12 publications

References 29 publications

Silver Nanoparticles-Based SERS Platform towards Detecting Chloramphenicol and Amoxicillin: An Experimental Insight into the Role of HOMO–LUMO Energy Levels of the Analyte in the SERS Signal and Charge Transfer Process

Silver Nanoparticles-Based SERS Platform towards Detecting Chloramphenicol and Amoxicillin: An Experimental Insight into the Role of HOMO–LUMO Energy Levels of the Analyte in the SERS Signal and Charge Transfer Process

SERS performance of cubic-shaped gold nanoparticles for environmental monitoring

Nanomaterials in assaying of pollutants by surface-enhanced Raman spectroscopy

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