Intense quenching of fluorescence intensity of poly(vinyl pyrrolidone) molecules in presence of gold nanoparticles

Behera, M.; Ram, S.

doi:10.1007/s13204-012-0159-8

Cited by 28 publications

(17 citation statements)

References 23 publications

(39 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Further we studied PL quenching of MB molecules in presence of an oxide quencher using the well-known SternVolmer equation [25,34] which can be written as:…”

Section: Zeta Potential and Xps Studymentioning

confidence: 99%

Section: Zeta Potential and Xps Studymentioning

confidence: 99%

“…Figure 10b demonstrates [32,34]. Further, such a large K SV value suggests existence of strong surface interaction between MB molecules and Cu 2 O NP via S-atom of MBH molecule [32,34,35]. Tong et al [35] have studied the interaction between MB dye and calf thymus deoxyribonucleic acid (ct-dRNA) by PL spectroscopic technique.…”

Section: Zeta Potential and Xps Studymentioning

confidence: 99%

See 2 more Smart Citations

Inquiring the photocatalytic activity of cuprous oxide nanoparticles synthesized by a green route on methylene blue dye

Behera¹,

Giri²

2016

Int J Ind Chem

View full text Add to dashboard Cite

We synthesized cuprous oxide (Cu 2 O) nanoparticles (NPs) with an average crystallite size of 8.8 nm in presence of Arka (Calotropis gigantea) leaves extract. The photo-bleaching activity of Cu 2 O NPs on the aqueous methylene blue (MB) dye was studied by illumination of visible light. In the absorption spectra, a decrease in the absorption peak intensity at 665 nm of MB was observed in presence of Cu 2 O NPs. A red shift in its peak position as a function of irradiation time is suggesting that oxide particles are degrading the organic dye in an aqueous medium. In the vibration spectra, red shift in the C-H stretching band (2954, 2926, and 2855 cm -1 ) of methylene group and C-N stretching band (1343 and 1226 cm -1 ) of MB in presence of Cu 2 O NPs proposes a surface adsorption of MB over NP's surfaces. Quenching in the emission band intensity and red shifts in the peak maxima of MB in presence of Cu 2 O NPs is ascribed to the charge transfer interaction between MB and oxide NPs. A linear SternVolmer plot reveals that decrease in the emission intensity of MB dye occurs via the dynamic quenching mechanism. Synthesis of Cu 2 O NPs of various architectures using a green route could be use as an approach towards the costeffective treatment of water pollutants.

show abstract

“…Further we studied PL quenching of MB molecules in presence of an oxide quencher using the well-known SternVolmer equation [25,34] which can be written as:…”

Section: Zeta Potential and Xps Studymentioning

confidence: 99%

Section: Zeta Potential and Xps Studymentioning

confidence: 99%

Section: Zeta Potential and Xps Studymentioning

confidence: 99%

See 1 more Smart Citation

Inquiring the photocatalytic activity of cuprous oxide nanoparticles synthesized by a green route on methylene blue dye

Behera¹,

Giri²

2016

Int J Ind Chem

View full text Add to dashboard Cite

show abstract

“…Red-shift of nearly 3 cm −1 in the typical Cu-O stretching band in presence of bio-surfactant reveals surface encapsulation of oxide NPs via O-atom of hydroxyl group of one of the major constituent (i.e. saponin) present in the leaf extract of arka (Calotropis gigantea) plant [17][18][19]. Such interfacial interaction between oxide particles and saponin is vital in enhancing the colloidal stability of aqueous Cu 2 O dispersions.…”

Section: Ft-ir Spectramentioning

confidence: 99%

Green synthesis and characterization of cuprous oxide nanoparticles in presence of a bio-surfactant

Behera¹,

Giri²

2014

Materials Science-Poland

Self Cite

View full text Add to dashboard Cite

Herein, we report a facile green synthesis of Cu 2 O nanoparticles (NPs) using copper sulfate as precursor salt and hydrazine hydrate as reducing agent in presence of bio-surfactant (i.e. leaves extract of arka -a perennial shrub) at 60 to 70°C in an aqueous medium. A broad band centered at 460 nm in absorption spectrum reveals the formation of surfactant stabilized Cu 2 O NPs. X-ray diffraction pattern of the surfactant stabilized NPs suggests the formation of only Cu 2 O phase in assistance of a bio-surfactant with the crystallite size of ∼8 nm. A negative zeta potential of −12 mV at 8.0 pH in surfactant stabilized Cu 2 O NPs hints non-bonding electron transfer from O-atom of saponin to the surface of NP. Red-shift in the vibrational band (Cu-O stretching) of Cu 2 O from 637 cm −1 to 640 cm −1 in presence of bio-surfactant suggests an interfacial interaction between NPs and O-atoms of -OH groups of saponin present in the plant (i.e. Calotropis gigantea) extract. From X-ray photoelectron spectroscopy spectra, a decrease in binding energy of both 2p 3/2 and 2p 1/2 bands in Cu 2 O with saponin molecules as compared to bulk Cu atom reveals a charge transfer interaction between NP and saponin surfactant molecules. Transmission electron microscopy images show crystalline nature of Cu 2 O NPs with an fcc lattice.

show abstract

“…When the intensity of the fluorescence emission is observed as a function of concentration of quencher a plot of (Io/I) vs. [Q] is a linear relationship according to Stern-Volmer relation. The slopeshows the efficiency of the quenching of the fluorophore excited state[16]. The general kinetic scheme for photophysical and quenching processes in the polymer are[17,18]:…”

mentioning

confidence: 99%

Influence of Diethyl Phthalate (DEP) on Fluorescence Emission Quenching of Poly Vinyl Chloride (PVC) in Solid Films

Tawfiq¹,

Kamil²,

Mansour³

2020

DJPS

View full text Add to dashboard Cite

In this study, the effects of temperature on the absorption and emission spectra of polyvinyl chloride films were investigated in the presence of diethyl phthalate as a quencher. In this paper, diethyl phthalate (DEP) was used as a quencher at different concentrations to study its effect on the behavior of absorption and emission spectra in the wavelength range from 200 to 350 nm. The films have been treated thermally at 25, 40, 50 and 60 o C. The results showed that the absorption spectrum contains two absorption bands for all samples. The first absorption band appeared in the range of 200 to 220 nm. The maximum absorption band was shifted towards red wavelengths depending on the concentration and temperature. The second absorption band appeared from 260 to 300 nm was weak, broad and unaffected by a concentration while showing a simple response to temperature without displacement in the maximum absorption (λmax.). The changes in absorbance as a function of quencher concentration at room temperature (25 o C) are illustrated.

show abstract

Intense quenching of fluorescence intensity of poly(vinyl pyrrolidone) molecules in presence of gold nanoparticles

Cited by 28 publications

References 23 publications

Inquiring the photocatalytic activity of cuprous oxide nanoparticles synthesized by a green route on methylene blue dye

Inquiring the photocatalytic activity of cuprous oxide nanoparticles synthesized by a green route on methylene blue dye

Green synthesis and characterization of cuprous oxide nanoparticles in presence of a bio-surfactant

Influence of Diethyl Phthalate (DEP) on Fluorescence Emission Quenching of Poly Vinyl Chloride (PVC) in Solid Films

Contact Info

Product

Resources

About