Novel Clarification of Surface Plasmon Coupling Reactions of Aromatic Alkynamine and Nitro Compounds

Yang, Yanqiu; Luo, Jibiao; Song, Peng; Ding, Y.; Xia, Lixin

doi:10.1021/acsomega.1c05746

Cited by 2 publications

(2 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure C shows amplified Raman spectra of the experimental and calculated at specific bands. The distinct SERS peaks of 4-EA at 1174, 1595, and 1985 cm –1 are attributed to the C–H in-plane bending (δ C–H ), skeleton stretching vibration of the benzene ring (ν benzene ring ), and CC stretching vibration (ν CC ). − In the presence of NO 2 – , new peaks are observed in the SERS spectra at 1137 cm –1 and the silent region at 2205 cm –1 , which are attributed to the C–N stretching vibration (ν C–N ) and NN stretching vibration (δ NN ), respectively. Notably, the calculated Raman peaks show a distinct blue shift compared to experimental results.…”

Section: Resultsmentioning

confidence: 99%

Reducing Interferences from Organic Matter during Optical Environmental Detection using SERS-Silent Region Nanosensors: A Case of Nitrite Detection

Liu,

Zhang,

et al. 2024

ACS EST Eng.

View full text Add to dashboard Cite

Optical detection techniques are frequently used in environmental monitoring due to their high sensitivity and stability; however, to decrease the optical interferences from environmental matrix remains challenging. Herein, to decrease the optical interferences from dissolved organic matter (DOM), a surface-enhanced Raman scattering (SERS)-silent region (1800–2800 cm–1) sensor has been studied for the detection of NO2 – (a model pollutant) in the presence of DOM. 4-Ethynylaniline (4-EA) was selected as the sensing molecule. The signal band (2205 cm–1) and the internal standard band of 4-EA (1985 cm–1) in the SERS-silent region are used for the quantitative analysis of NO2 –. Since the SERS-silent region can well avoid the overlapping with the DOM signal, the dual-silent band ratio I2205/I1985 exhibits outstanding anti-interference ability toward different common organic matter. Compared with the traditional UV–vis detection, this method maintains a higher sensitivity (with a detection limit of 10–7 M) and a better accuracy (detection recovery ranges from 89.9 to 109.7%) for NO2 – detection in real samples. Furthermore, this SERS dual-silent region sensor has been successfully employed in an environmental survey of a local river. These findings imply that the SERS-silent nanosensor provides a way to develop accurate optical detection techniques for environmental monitoring.

show abstract

Section: Resultsmentioning

confidence: 99%

Reducing Interferences from Organic Matter during Optical Environmental Detection using SERS-Silent Region Nanosensors: A Case of Nitrite Detection

Liu,

Zhang,

et al. 2024

ACS EST Eng.

View full text Add to dashboard Cite

show abstract

“…While the thiolated molecules represent so far the most intensively studied chemisorbates on metal surfaces, organic molecules may also use other nonthiolated surface-anchoring groups, such as diazonium, − terminal alkyne, − N -heterocyclic carbene, − and isocyano groups, − to form covalent interactions with metallic substrates. Previous studies of plasmon-driven nitro-coupling reactions, however, have been exclusively focusing on thiolated nitrophenyl adsorbates. − ,− How the nonthiolated nitrophenyl derivatives behave differently from their thiolated counterparts during the plasmon-driven coupling reactions remains unexplored yet.…”

Section: Introductionmentioning

confidence: 99%

Metal–Adsorbate Interactions Modulate Plasmonic Reactivity of Chemisorbed Nitrophenyl Derivatives

Chen

Wang

2023

J. Phys. Chem. C

View full text Add to dashboard Cite

Energetic hot electrons generated upon nonradiative decay of localized plasmons in metallic nanostructures can be effectively harnessed to catalyze photochemical transformations of molecular adsorbates through unique reaction pathways. When designing metal− adsorbate hybrid systems for hot electron-driven photocatalysis, both the intrinsic plasmonic properties of metallic photocatalysts and the chemical nature of metal−adsorbate interactions should be taken into careful considerations. In this work, we show that the reactivity of nitrophenyl derivative adsorbates on Ag nanoparticle surfaces toward plasmon-driven reductive coupling reactions is intimately tied to the bonding nature of molecular chemisorption. We focus on the comparative studies of three representative nitrophenyl derivatives, specifically para-nitrothiophenol, para-nitrophenylacetylene, and paranitrophenylisocyanide, which covalently interact with the Ag photocatalysts using chemically distinct surface-anchoring groups. Taking full advantage of the unique time-resolving and molecular fingerprinting capabilities offered by surface-enhanced Raman spectroscopy, we have been able to precisely correlate the chemical nature of metal−adsorbate interactions to the kinetic characteristics of molecular transformations under a broad range of reaction conditions. Although the kinetic features of the coupling reactions change substantially upon variation of the excitation wavelength, the light illumination power, and the pH of the reaction medium, we have consistently observed that the plasmonic reactivity of the nitrophenyl derivative adsorbates drops drastically, as reflected by significant decrease in both reaction rates and yields, when the bonding modes dominating the metal−adsorbate interactions are switched from σ-donation to π-back-donation.

show abstract

Novel Clarification of Surface Plasmon Coupling Reactions of Aromatic Alkynamine and Nitro Compounds

Cited by 2 publications

References 45 publications

Reducing Interferences from Organic Matter during Optical Environmental Detection using SERS-Silent Region Nanosensors: A Case of Nitrite Detection

Reducing Interferences from Organic Matter during Optical Environmental Detection using SERS-Silent Region Nanosensors: A Case of Nitrite Detection

Metal–Adsorbate Interactions Modulate Plasmonic Reactivity of Chemisorbed Nitrophenyl Derivatives

Contact Info

Product

Resources

About