Study of enhanced red emission from Sm(Sal)3Phen ternary complexes in Poly Vinyl Alcohol film

Kaur, Gagandeep; Dwivedi, Y.; Rai, S.B.

doi:10.1016/j.optcom.2010.05.017

Cited by 41 publications

(9 citation statements)

References 37 publications

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“…C‐H bending and C‐C stretching absorption were ~ 1563–1375 cm −1 and C‐O stretching was observed at ~ 1166 cm −1 . A peak due to Gd‐O stretching was observed at ~ 562 cm −1 . A significant peak at 934 cm −1 was observed in Gd 2 O 3 :Er,Yb PVA colloid but not in pure PVA, which could be due to bonding of the PVA chain with the surface of Gd 2 O 3 :Er,Yb particles .…”

Section: Resultsmentioning

confidence: 91%

Synthesis and characterization of a stable dispersion of multifunctional Gd₂O₃:Er,Yb in polyvinyl alcohol

Kaur

2012

Luminescence

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A stable dispersion of multifunctional Gd2O3:Er,Yb phosphor in polyvinyl alcohol (PVA) was synthesized by varying the concentration of Yb(3+) ions. It had a strong ultraviolet-visible-near infrared (UV-vis) upconversion emission and applications in temperature and magnetic field sensors (e.g., nano-heaters), as well as potential use in bioleveling and bioimaging. Stability of the dispersion was found to strongly depend on the mixing process of the powder in the polymer solution. Spherical shaped nanoparticles in cubic phase of ~ 43 nm diameter were synthesized and characterized by X-ray diffraction; results were confirmed by scanning electron microscopy (SEM). Fourier transform infrared sspectroscopy (FT-IR) and thermal analysis supported the presence of PVA. NIR pumping produced strong UC emission bands in the red and green regions extending up to very high UV (240 nm). This method provides an alternative for synthesizing a highly UC-efficient non-agglomerated pure transparent dispersion from various efficient phosphors for biological applications.

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Section: Resultsmentioning

confidence: 91%

Synthesis and characterization of a stable dispersion of multifunctional Gd₂O₃:Er,Yb in polyvinyl alcohol

Kaur

2012

Luminescence

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“…0.015 mmol of salicylic acid and 0.005 mmol 1,10-phenanthroline were independently dissolved in 2.0 ml ethanol to get its ethanolic solution. Both were added and stirred rigorously for an hour to achieve Tb(Sal) 3 (Phen) complex as explained by Kaur et al [21].…”

Section: Preparation Of Tb(sal) 3 (Phen) Complexmentioning

confidence: 99%

Spectroscopic Investigations on Polyvinyl Alcohol Film with Complex of Terbium Ions along with Bismuth Nanoparticles for Improved Green Emission

Kaur¹,

Kumar²,

Rai³

2017

Acrylic Polymers in Healthcare

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In this chapter, bismuth nanoparticles (NPs) have been synthesized by the pulsed laser ablation technique at diferent pH in diferent aqueous solutions (namely, water (H), water + sodium hydroxide (HN), and water + hydrochloric acid (HC)). The NPs in aqueous solutions have been characterized by transmission electron microscopy (TEM) and UV-Vis-NIR absorption techniques. The NPs are spherical, core shell, and hollow spheres in H, HN, and HC, respectively. The vibrational features have been studied using Raman technique and correlated with solid NPs, hollow NPs, core shell NPs, and NPs complex, etc. The Bi NPs were subsequently scatered with Tb 3+ ions and their complex with salicylic acid (Sal) and 1,10-phenanthroline in aqueous solution of polyvinyl alcohol to get thin polymer ilms. Then photoluminescence properties of Tb 3+ ions and the (Tb(Sal) 3 (Phen)) complex were studied using 266 nm and 355 nm as excitation wavelengths to seek into the inluence of Bi NPs on their emissive properties. Terbium ions in case of (Tb(Sal) 3 (Phen)) complex together with NPs demonstrate an intense and extended emission spectrum in the 375-700 nm range for transition arising even from

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“…In order to overcome these defects, doping of RE complexes into a polymer matrix has attracted much attention. The polymer-based composites present excellent fluorescent properties, besides the enhanced mechanical and thermal properties [15][16][17][18][19].…”

Section: Coordination Polymermentioning

confidence: 99%

A novel scheme to obtain tunable fluorescent colors based on electrospun composite nanofibers

Yang

Dong

et al. 2014

J Mater Sci: Mater Electron

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Europium complexes Eu(BA) 3 phen (BA = benzoic acid, phen = 1,10-phenanthroline) and Terbium complexes Tb(BA) 3 phen are incorporated into polyvinyl pyrrolidone (PVP) and electrospun into [Eu(BA) 3 phen + Tb (BA) 3 phen]/PVP composite nanofibers. The morphologies and properties of the final products are investigated via scanning electron microscopy, energy dispersive spectrometry,X-ray powder diffractometry, fluorescence spectroscopy, Fourier-transform infrared spectroscopy and thermogravimetry. The diameter of the composite nanofibers is 431.55 ± 3.14 nm. The obtained composite nanofibers are amorphous in structure and stable below 220°C. By adjusting the ratio of Eu(BA) 3 phen to Tb (BA) 3 phen complexes, the fluorescence color of composite nanofibers can be tuned from red to yellow, yellow green, and green under the excitation of 276-nm single-wavelength ultraviolet light. Besides, the fluorescence lifetime of Eu 3+ ions in composite nanofibers is extended gradually, while that of Tb 3+ ions is decreased slowly with increase of Tb (BA) 3 phen content. The novel color-tunable composite nanofibers have potential applications in the fields of optical devices, color displays and sensor systems.

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Study of enhanced red emission from Sm(Sal)3Phen ternary complexes in Poly Vinyl Alcohol film

Cited by 41 publications

References 37 publications

Synthesis and characterization of a stable dispersion of multifunctional Gd₂O₃:Er,Yb in polyvinyl alcohol

Synthesis and characterization of a stable dispersion of multifunctional Gd₂O₃:Er,Yb in polyvinyl alcohol

Spectroscopic Investigations on Polyvinyl Alcohol Film with Complex of Terbium Ions along with Bismuth Nanoparticles for Improved Green Emission

A novel scheme to obtain tunable fluorescent colors based on electrospun composite nanofibers

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Study of enhanced red emission from Sm(Sal)3Phen ternary complexes in Poly Vinyl Alcohol film

Cited by 41 publications

References 37 publications

Synthesis and characterization of a stable dispersion of multifunctional Gd2O3:Er,Yb in polyvinyl alcohol

Synthesis and characterization of a stable dispersion of multifunctional Gd2O3:Er,Yb in polyvinyl alcohol

Spectroscopic Investigations on Polyvinyl Alcohol Film with Complex of Terbium Ions along with Bismuth Nanoparticles for Improved Green Emission

A novel scheme to obtain tunable fluorescent colors based on electrospun composite nanofibers

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Synthesis and characterization of a stable dispersion of multifunctional Gd₂O₃:Er,Yb in polyvinyl alcohol

Synthesis and characterization of a stable dispersion of multifunctional Gd₂O₃:Er,Yb in polyvinyl alcohol