The nucleobase assisted pyrene functionalization of gold nanoparticles

Mouli, M. S. S. Vinod; Tamrakar, Arpna; Pandey, Mrituanjay D.; Mishra, Ashutosh Kumar

doi:10.1039/d1nj00556a

Cited by 5 publications

(4 citation statements)

References 43 publications

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“…Since the proposed methodology employs a low-voltage sweep between the closely spaced (0.4 mm) screen-printed electrodes to generate a high-intensity electric field suitable for electrochemical reforming, the solar panels can be integrated very easily to the device to produce H 2 under these circumstances, as shown in the Supporting video 3, Supporting Information ESI. 4g) of the Au NPs showed 0.24 nm spacing between the fringes of gold quasinanospheres, [55][56][57][58][59][60][61] which is in agreement with the standard spacing between (111) planes (2.38 Å). The patterns are indexed in accordance with (111), ( 200), (220), and (311) planes of FCC gold on the basis of their interplanar distances of 2.40, 2.05, 1.467, and 1.22 Å.…”

Section: Resultssupporting

confidence: 79%

“…The ring structure is characteristic of polycrystalline gold. The high-resolution transmission electron microscopic (HRTEM) image (Figure4g) of the Au NPs showed 0.24 nm spacing between the fringes of gold quasinanospheres,[55][56][57][58][59][60][61] which is in agreement with the standard spacing between (111) planes (2.38 Å). The patterns are indexed in accordance with (111), (200), (220), and (311) planes of FCC gold on the basis of their interplanar distances of 2.40, 2.05, 1.467, and 1.22 Å.…”

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confidence: 72%

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Enhanced Hydrogen Production during Electro‐Oxidation of Ethanol using Plasmonic Gold Nanoparticles

et al. 2022

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Electrochemical reforming of alkaline ethanol through nonfossil fuel resources is an attractive single‐step method at room temperature and pressure for hydrogen production. Herein, solar panels are used to generate and allow low‐voltage current to flow into screen‐printed electrodes with milliscale spacing to produce a high‐intensity electric field, engendering electrolysis of alkaline ethanol into H2. The introduction of gold nanoparticles (Au NPs) with diameters between 20 and 100 nm into the electrolyte results in an enhanced capacity of the electrolyzer to produce H2 under an illumination equivalent to solar irradiance. The plasmonic Au NPs facilitate faster electro‐oxidation of the alkaline ethanol. The solar irradiance serves dual purposes—generation of a high‐intensity electric field in the electrolyte and plasmonic effects for a faster rate of H2 production. The results show current densities as high as 135, 240, and 118 A m−2 with independent variations in sizes of Au NPs, wavelength of solar radiation, and irradiance of light, respectively. Furthermore, a high Faradaic efficiency of 82% is obtained for the electrolyte solution containing Au NPs of size 50 nm. Integration of multiple screen‐printed electrodes shows further enhancement of H2 throughput, leaving a niche for the prototype to scale‐up H2 production.

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Section: Resultssupporting

confidence: 79%

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confidence: 72%

Enhanced Hydrogen Production during Electro‐Oxidation of Ethanol using Plasmonic Gold Nanoparticles

et al. 2022

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Section: Introductionmentioning

confidence: 99%

“…Our earlier efforts with covalently linked pyrene to the nucleobase entity has displayed excellent selective silver sensing [35] and a functionalized gold nanoparticle with intact fluorophore luminescence properties. [36] Herein, we report the synthesized N10 linked flavin-pyrene dyads The synthetic route for the synthesis of FlPy1 and FlPy2 is shown in Schemes 2 and 3. Absorption, emission and electrochemical investigations were performed to ascertain the inherent nature of the dyads and the effect of spacer, which is discussed in the following sections.…”

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Investigating the spectral and electrochemical properties of novel flavin‐pyrene dyads separated via variable spacer

et al. 2022

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The present manuscript describes the synthesis and the photophysical properties of a pair of novel flavin-pyrene dyads where the donor and the acceptor entities are separated via variable spacer. The dyads were well characterized using standard techniques and investigated for their photophysical and electrochemical nature. The observed absorption spectra of the dyads mainly display peaks corresponding to the individual pyrene and flavin units, with some contribution from the flavin entity in the pyrene region. While, strong emission quenching was observed for both the dyads if compared to its individual constituents. However, a careful analysis of the emission spectra and the solvent dependent studies reveals subtle difference between the two dyads. While no significant difference could be observed when excited in the flavin region; excitation at the pyrene region displays a weak and broad emission band in case of closely connected dyad. Further, the electrochemical properties were investigated by cyclic voltammetry and the reduction ability was observed to follow the trend as FlPy2 < FlPy1 < Fl.

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Pyrene Functionalized Luminescent Phenylalanine for Selective Detection of Copper (II) Ions in Aqueous Media

et al. 2023

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A novel pyrene-based uorescent chemosensor 1 (pyren-1ylmethyl)-L-phenylalanine was designed and synthesized by combining 1-pyrenecarboxyaldehyde and L-phenylalanine. 1 was characterized by several analytical methods and used as a uorescent chemosensor for the selective and sensitive detection of Cu 2+ ions through "turn-off" mechanism with a detection limit of 2 x 10 − 8 M. 1 can also be used to detect Cu 2+ ions in a natural water sample and exhibits gelation properties with high thermal stability.

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The nucleobase assisted pyrene functionalization of gold nanoparticles

Abstract: Herein, we report the functionalization of the gold nanoparticles with pyrene fluorophore via a connecting nucleobase spacer displaying the inherent photoluminescence behavior, without getting quenched by the gold nanoparticle surface...

Cited by 5 publications

References 43 publications

Enhanced Hydrogen Production during Electro‐Oxidation of Ethanol using Plasmonic Gold Nanoparticles

Enhanced Hydrogen Production during Electro‐Oxidation of Ethanol using Plasmonic Gold Nanoparticles

Investigating the spectral and electrochemical properties of novel flavin‐pyrene dyads separated via variable spacer

Pyrene Functionalized Luminescent Phenylalanine for Selective Detection of Copper (II) Ions in Aqueous Media

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