Water soluble gold-polyaniline nanocomposite: A substrate for surface enhanced Raman scattering and catalyst for dye degradation

Mondal, Palash; Guo, Chengchen; Yarger, Jeffery L.

doi:10.1016/j.arabjc.2019.05.004

Cited by 31 publications

(19 citation statements)

References 55 publications

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“…The FT-IR spectra of ONPG powder and Au@PGlyco NPs prepared using different concentrations of ONPG are shown in Figure a. The relatively strong signals at 3400, 1035, and 1066 cm –1 in the FT-IR spectra of Au@PGlyco NPs were attributed to the −OH stretching, C–O stretching, and C–OH bending from the galactose structure, respectively . The binding energy of C 1s appeared at 286.5 eV, which was assigned to the sugar-based fingerprints of the C–O–C and C–OH structures based on X-ray photoelectron spectroscopy (XPS) (Figure S3b).…”

Section: Resultsmentioning

confidence: 99%

“…The relatively strong signals at 3400, 1035, and 1066 cm −1 in the FT-IR spectra of Au@PGlyco NPs were attributed to the −OH stretching, C−O stretching, and C−OH bending from the galactose structure, respectively. 39 The binding energy of C 1s appeared at 286.5 eV, which was assigned to the sugar-based fingerprints of the C−O−C and C−OH structures 40 based on X-ray photoelectron spectroscopy (XPS) (Figure S3b). Notably, the intensities of specific peaks at 1525 cm −1 (ν asym ) and 1378 cm −1 (ν sym ), which were attributed to the NO 2 group, 41 were dramatically decreased upon the formation of the Au@PGlyco NPs (Figure 2a).…”

Section: Resultsmentioning

confidence: 99%

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In Situ Formation of Au-Glycopolymer Nanoparticles for Surface-Enhanced Raman Scattering-Based Biosensing and Single-Cell Immunity

Chia

Yang

Cheng

et al. 2021

ACS Appl. Mater. Interfaces

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Successful synthesis of glyconanoparticles has attracted much attention due to their various biointeractive capabilities, but it is still a challenge to understand different single-cell responses to exogenous particles among cell populations. Herein, we designed polyaniline-containing galactosylated gold nanoparticles (Au@PGlyco NPs) via in situ polymerization of ortho-nitrophenyl-β-galactoside assisted by Au nucleation. The nanogold-carrying polyaniline block produced electromagnetic enhancement in surface-enhanced Raman scattering (SERS). The underlying polymerization mechanism of ortho-nitrophenyl compounds via the formation of Au nanoparticles was investigated. Depending on how the galactoside moiety reacted with β-galactosidase derived from bacteria, the Au@PGlyco NPs-mediated SERS biosensor could detect low amounts of bacteria (∼1 × 102 CFU/mL). In addition, a high accumulation of Au@PGlyco NPs mediated the immune response of tumor-associated M2 macrophages to the immunogenic M1 macrophage transition, which was elicited by reactive oxygen levels biostimulation using single-cell SERS-combined fluorescence imaging. Our study suggested that Au@PGlyco NPs may serve as a biosensing platform with the labeling capacity on galactose-binding receptors expressed cell and immune regulation.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

In Situ Formation of Au-Glycopolymer Nanoparticles for Surface-Enhanced Raman Scattering-Based Biosensing and Single-Cell Immunity

Chia

Yang

Cheng

et al. 2021

ACS Appl. Mater. Interfaces

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“…In case of pristine PANI, the peak appeared at 332 and 631 nm are owing to the π-π* and n-π* transitions of the benzenoid and quinoid structures, respectively that con rms the emeraldine salt form of the PANI [34]. In case of the Au@PANI nanocomposite, the incorporation of AuNPs into the PANI matrix exhibited the shifting of the peak position to the higher wavelength region that con rms the successful encapsulation of the AuNPs by means of the PANI molecular chains [35]. The f-SWNTs and f-MWNTs decorated PANI matrix show the shifting of the absorption peak towards the higher wavelength region that indicates the formation of f-SWNTs@PANI and f-MWNTs@PANI nanocomposites [36].…”

Section: Uv-vis Analysismentioning

confidence: 87%

“…Furthermore, a small peak observed at 815 cm -1 is ascribed to the out of plane bending vibration of C-H bond [19,34,35,[49][50][51][52]. The Au@PANI nanocomposite exhibits all the absorption peaks of the neat PANI matrix with a slightly shifting of the band positions, which con rms the development of the interphase interactions between the AuNPs and PANI matrix due to the a nity of the AuNPs for the nitrogen atoms present in the backbone chain of the PANI matrix [35,53]. Both binary and ternary PANI nanocomposites exhibit all the absorption peaks of the PANI matrix with the shifting of the peak positions of the -OH, C = C, and C-H bonds that pronounces higher absorption intensity as compare to the virgin PANI.…”

Section: Uv-vis Analysismentioning

confidence: 99%

Synthesis and Characterization of a New Gold Nanoparticles decorated functionalized Carbon Nanotubes Hybrid Nanofillers reinforced Polyaniline Ternary Nanocomposites: Thermal, Dielectric, and Sensing Properties

Shubhadarshinee

Mohapatra

Jali

et al. 2022

Preprint

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The present study deals with the synthesis of gold nanoparticles (AuNPs) reinforced functionalized single-walled carbon nanotubes (f-SWNTs)/multi-walled carbon nanotubes (f-MWNTs) based polyaniline (PANI) ternary nanocomposites, using in situ polymerization process to analyze the thermal, dielectric and sensing properties. The chemical interaction and nanostructure characteristics of the synthesized nanocomposites are studied using ultraviolet-visible (UV-Vis) spectroscopy, Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy, X-ray diffraction (XRD) analysis, and X-ray photoelectron spectroscopy (XPS). The morphological characterizations of the nanocomposites are investigated by scanning electron microscopy (SEM) and field emission scanning electron microscopy (FESEM). The dispersion stability and average size distribution of the nanocomposites are examined by means of dynamic light scattering (DLS) technique. The thermal and dielectric properties of the nanocomposites are carried out by using thermogravimetry-differential scanning calorimetry (TG-DSC) and dielectric relaxation spectroscopy (DRS), respectively. The sensing behavior of the nanocomposites is analyzed through UV-Vis spectroscopy. The thermal, dielectric, and sensing properties of the Au@f-SWNTs and Au@f-MWNTs nanohybrids embedded PANI ternary nanocomposite is significantly increased due to the strong interfacial interactions originated between the hybrid nanofiller and PANI matrix.

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“…The (PAni-Mn) Nano catalyst was used for the first time in Kabachnik-Field Reaction for α-Aminophosphonates synthesis. During the last decade, Polyaniline had great importance in the catalytic field [20][21] . The doping of the polyanilinewith metal increases the catalytical activity 22 .…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Biologically Potent α-Aminophosphonates Derivatives by Nano-Catalyst

Wavhal¹,

Nagrik

2022

Orient. J. Chem

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α-Aminophosphonate and their derivatives are biologically potent and have received considerable attention in a recent research scenario. The main reason is that they show triguing biological activity. α-Aminophosphonate derivatives are gaining a lot of importance in medicinal chemistry due to their application as enzyme inhibitors, herbicides, antibiotics, pharmaceutical agents and inhibitors of Excitatory Post-Synaptic Potential(EPSP) synthesis, and HIV Protease. It is also important in ati-cancer, anti-HIV, antithrombotic and antibacterial, antioxidant activity. Unfortunately, these compounds have certain limitation such as extraction, purification, of bioactive molecule and their minimum yields. For this reason, many scientists have been orienting their research towards the synthesis of molecules as a new tool to overcome this problems he prime focus of this work is the combination of three reactant derivative of benzaldehyde derivative of aniline, and diethyl phosphonate to form α-aminophosphonates derivatives by multicomponent reaction(KFR). The novel nano-catalyst i.e. polyanilinedoped with manganese (PAni-Mn) was prepared. The catalyst shows excellent catalytic activity, high yields, short reaction times, easy synthesis. The PAni was fully characterized by X-ray diffraction, TEM, SEM, and FT-IR technique.

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Water soluble gold-polyaniline nanocomposite: A substrate for surface enhanced Raman scattering and catalyst for dye degradation

Cited by 31 publications

References 55 publications

In Situ Formation of Au-Glycopolymer Nanoparticles for Surface-Enhanced Raman Scattering-Based Biosensing and Single-Cell Immunity

In Situ Formation of Au-Glycopolymer Nanoparticles for Surface-Enhanced Raman Scattering-Based Biosensing and Single-Cell Immunity

Synthesis and Characterization of a New Gold Nanoparticles decorated functionalized Carbon Nanotubes Hybrid Nanofillers reinforced Polyaniline Ternary Nanocomposites: Thermal, Dielectric, and Sensing Properties

Synthesis of Biologically Potent α-Aminophosphonates Derivatives by Nano-Catalyst

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