Study on Preparation and Luminescence of Green Phosphate Phosphor

2013 ◽  
Vol 274 ◽  
pp. 467-470
Author(s):  
Ze Wu ◽  
Tao Jiang ◽  
Nai Xiang Liang ◽  
Ya Ling Sun ◽  
Li Min Dong
Keyword(s):  
Fluorescence Intensity ◽  
Surface Composition ◽  
Fluorescence Properties ◽  
Luminescent Materials ◽  
Green Phosphor

In this article, La0.6Ce0.27Tb0.13PO4 green phosphor has been successfully synthesized through the method of co-percipition. The surface composition, morphology, and fluorescence properties of luminescent materials were characterized by XRD, SEM, and PL. The results showed that: the added sensitizer of Ce3+ ion rapidly increased the fluorescence intensity, further proved that Ce3+ ions have sensitization on Tb3+ ions. In system of La1-x-yPO4: yCe, the fluorescence intensity of xTb, La0.8PO4:0.1Ce,0.1Tb is strongest, and it’s the best ratio of the system.

Solvatochromic Fluorescence of 8-(Phenylamino)-1-naphthalene-ammoniumsulfonate (8,1 ANS) in 1,4-Dioxane/Water Mixtures, revisited

1993 ◽  
Vol 48 (5-6) ◽  
pp. 709-712 ◽  
Author(s):  
Stefan H. Hüttenhain ◽  
Wolfgang Balzer
Keyword(s):  
Hydrogen Bonding ◽  
Key Words ◽  
Fluorescence Intensity ◽  
Stokes Shift ◽  
Solvent Mixture ◽  
Fluorescence Properties ◽  
Correlation Line ◽  
Polarity Parameters

Abstract The correlation of the solvatochromic fluorescence properties of 8-(phenylamino)-1-naphthalene-ammoniumsulfonate (8,1 ANS) in 1,4-dioxane/water mixtures with Eτ(30) and Δƒ values of the respective solvents shows that besides the polarity the nature of the solvent mixture determines the fluorescence intensity I and the Stokes shift Δv̅. Different amounts of hydrogen-bonding are suggested to be responsible for the different slopes of the correlation line plots. Key words: Solvatochromic fluorescence 8-(phenylamino)-1-naphthalene-ammoniumsulfonate (8,1 ANS); Semi-empiric polarity parameters 1,4-dioxane/water mixtures.

A fluorochrome from aniline blue: structure,synthesis and fluorescence properties

1982 ◽  
Vol 35 (12) ◽  
pp. 2571 ◽  
Author(s):  
NA Evans ◽  
PA Hoyne
Keyword(s):  
Critical Micelle Concentration ◽  
Cationic Surfactant ◽  
Fluorescence Intensity ◽  
Fluorescence Emission ◽  
Aniline Blue ◽  
Fluorescence Properties ◽  
Hexadecyltrimethylammonium Bromide ◽  
Commercial Sample ◽  
Emission Maximum ◽  
Structure Synthesis

A fluorochrome has been isolated in analytically pure form from a commercial sample of the triaryl-methane dye aniline blue. Its structure has been shown to be sodium 4,4'-[carbonylbis(benzene-4,1-diyl)bis(imino)]bisbenzenesulfonate by spectroscopic means and confirmed by synthesis. Its fluorescence emission, which is markedly solvent-dependent, is 150 times greater in butan-1-ol than in water (however, the wavelength of the emission maximum is not altered significantly). In the presence of a cationic surfactant, hexadecyltrimethylammonium bromide, the fluorescence intensity reaches a maximum at approximately the critical micelle concentration of the surfactant.

Efficient Synthesis, Photochromism and Fluorescence Properties of a Novel Diarylethene Bearing a Naphthalene

2014 ◽  
Vol 1003 ◽  
pp. 59-62
Author(s):  
Hong Yan Xu ◽  
Le Le Ma ◽  
Shou Zhi Pu
Keyword(s):  
Fluorescence Intensity ◽  
Uv Light ◽  
Fluorescence Properties ◽  
Efficient Synthesis ◽  
Strong Fluorescence ◽  
Closed Ring ◽  
Open Ring

A new unsymmetrical photochromic diarylethene compound 1a was synthesized and its photochromism were investigated. The compound exhibited good photochromism in solution and PMMA films with alternating irradiation by UV/Vis light, and the maxima absorption of its closed-ring isomer (1b) are 536 nm in hexane and 552 nm in PMMA films. The open-ring isomer of the diarylethene 1a exhibited relatively strong fluorescence at 441 nm when excited at 290 nm. Its fluorescence intensity decreased along with the photochromism from open-ring isomers to closed-ring isomers upon irradiation with 297 nm UV light.

scholarly journals Enhanced fluorescence properties of terbium complex/poly-l-lactic acid superfine fibers sensitized by the LSPR effect of silver nanoparticles

RSC Advances ◽  
2017 ◽  
Vol 7 (32) ◽  
pp. 19808-19814 ◽  
Author(s):  
Shipeng Wen ◽  
Guiming Zhang ◽  
Rong Zhang ◽  
Liqun Zhang ◽  
Li Liu
Keyword(s):  
Silver Nanoparticles ◽  
Lactic Acid ◽  
Quantum Efficiency ◽  
Fluorescence Intensity ◽  
Fluorescence Properties ◽  
Composite Fibers ◽  
Enhanced Fluorescence ◽  
Terbium Complex ◽  
Ag Nps ◽  
Lspr Effect

Due to the LSPR effect of Ag-NPs, the fluorescence intensity, quantum efficiency of Tb-complex in the composite fibers were improved.

Proton-induced fluorescence properties of terbium gallium garnet

1995 ◽  
Vol 10 (8) ◽  
pp. 1861-1863 ◽  
Author(s):  
W.A. Hollerman ◽  
J.H. Fisher ◽  
D. Ila ◽  
G.M. Jenkins ◽  
L.R. Holland
Keyword(s):  
Ambient Temperature ◽  
Fluorescence Spectrum ◽  
Fluorescence Intensity ◽  
Proton Irradiation ◽  
Garnet Crystal ◽  
Fluorescence Properties ◽  
Crystal Sample ◽  
Irradiation Test ◽  
Proton Dose

The authors completed a 3 MeV proton irradiation test on a terbium gallium garnet crystal sample. The main goal was to determine the proton dose required to reduce the fluorescence intensity to half its original value (half-brightness dose) at ambient temperature. The 3 MeV proton half-brightness dose was found to be 1.25 × 1015 p/cm2 using the Birks and Black relation. This decay is comparable to other fluors irradiated by the authors. The sample exhibited a yellow glow when irradiated in a 3 MeV beam. The fluorescence spectrum was composed of four peaks at wavelengths of 487.2 nm, 542.4 nm, 589.92 nm, and 624.1 nm.

Synthesis and Properties of a Novel Unsymmetrical Diarylethene with a Benzothiophene and a Thiazole Group

2013 ◽  
Vol 788 ◽  
pp. 190-193
Author(s):  
Hong Jing Jia ◽  
Shou Zhi Pu ◽  
Cong Bin Fan
Keyword(s):  
Thermal Stability ◽  
Fluorescence Intensity ◽  
Potential Application ◽  
Uv Light ◽  
Optical Storage ◽  
Fluorescence Properties ◽  
Good Thermal Stability ◽  
Closed Ring ◽  
Open Ring ◽  
Hexane Solution

A new unsymmetrical photochromic diarylethene1o, which is named 1-(2-methyl-benzothiophene)-2-(2,4-dimethyl-5-thiazoly) perfluorocyclopentene, was synthesized. In the meantime, its photochromic, kinetics and fluorescence properties were investigated in detail. The result indicated that this diarylethene had good thermal stability and exhibited reversible photochromism, changing the color from colorless to orange in hexane solution upon appropriate irradiation with 297 nm UV light, respectively. What is more, the kinetic experiments illustrated that the cyclization/cycloreversion process of this compound was determined to be the zeroth/first reaction. The fluorescence intensity of diarylethene decreased dramatically along with the photochromism from open-ring isomer to closed-ring isomer upon irradiation with UV light in hexane solution. In addition, the results demonstrated that the unsymmetrical diarylethene compound1o, which we have synthesized, had attractive properties for potential application in optical storage.

Synthesis and Properties of a Novel Photochromic Diarylethene Material Bearing Two Five-Membered Aryl Unit

2012 ◽  
Vol 164 ◽  
pp. 247-250 ◽  
Author(s):  
Xiao Ting Li ◽  
Hui Li ◽  
Shou Zhi Pu
Keyword(s):  
Fluorescence Intensity ◽  
Amorphous Film ◽  
Fluorescence Properties ◽  
Strong Fluorescence ◽  
Closed Ring ◽  
Open Ring ◽  
Hexane Solution

A new unsymmetrical photochromic diarylethene, 1-(2,5-dimethyl-3-thienyl)-2-(2 -methyl-5-p-tolyl-3-thienyl)perfluorocyclopentene (1) was synthesized, and its photochromic and fluorescence properties were investigated. The results showed the compound exhibited good photochromism in hexane solution and in PMMA amorphous film with alternating irradiation by UV/Vis light, the maxima absorption of its closed-ring isomer 1c are 541 nm and 551 nm respectively. The open-ring isomer of the diarylethene 1 exhibited relatively strong fluorescence at 360 nm in hexane solution (5 × 10-5 mol/L) when excited at 305 nm. The fluorescence intensity decreased along with the photochromism upon irradiation with 297 nm light. The fluorescence intensity of diarylethene 1o also depended on the concentration. When the concentration of diarylethene 1 in hexane increase from 1 × 10-6 mol/L to 1 × 10-3 mol/L, the fluorescence intensity of the open-ring isomer become strong first, then become weak

Development of N and S heteroatom co-doped stable dual emitting carbon ink in aqueous media for sensing applications

2017 ◽  
Vol 41 (19) ◽  
pp. 10851-10859 ◽  
Author(s):  
Srikrishna Pramanik ◽  
Parukuttyamma Sujatha Devi
Keyword(s):  
Fluorescence Intensity ◽  
Carbon Nanomaterials ◽  
Aqueous Media ◽  
Fluorescence Properties ◽  
Dual Emission ◽  
Chemical Route ◽  
Sensing Applications ◽  
Simple Chemical ◽  
Co Doped ◽  
Fluorescent Carbon

This manuscript describes a simple chemical route to synthesize nitrogen and sulfur co-doped highly fluorescent carbon nanomaterials with dual emission fluorescence properties. The fluorescence intensity of the (N,S)-CNPs has been found to be highly responsive towards Hg2+ ions and the pH of the solution.

scholarly journals Fluorescence properties of free and protein bound fluorescein dyes. I. Macrospectrofluorometric measurements.

1978 ◽  
Vol 26 (4) ◽  
pp. 277-283 ◽  
Author(s):  
K Schauenstein ◽  
E Schauenstein ◽  
G Wick
Keyword(s):  
Blue Light ◽  
Fluorescence Intensity ◽  
Gamma Globulin ◽  
Fluorescence Emission ◽  
Emission Spectra ◽  
Sharp Decrease ◽  
Fluorescein Isothiocyanate ◽  
Fluorescence Properties ◽  
Sodium Fluorescein ◽  
Uv Excitation

Excitation and emission properties of fluorescein derivatives were studied macrofluorometrically. Measurements were performed with solutions of various concentrations (0.07-100 microgram/ml) of free sodium fluorescein prepared from fluorescein diacetate (FDA), fluorescein isothiocyanate (FITC) and FITC bound to rabbit gamma-globulin. Both excitation and emission spectra as well as fluorescence intensities at constant excitation/emission wavelengths (496/515 nm) were recorded. The findings indicate that (1) FDA gives about twice the fluorescence intensity compared to equal concentrations of FITC. (2) The fluorescence properties of FITC upon excitation with blue light (lambda = 496 nm) are only slightly altered by the conjugation to rabbit gamma-globulin. (3) Considerable quenching due to conjugation could, however, be shown to occur upon UV excitation (lambda = 340 nm). (4) Fluorescence emission excited by visible blue light (496 nm) increases linearly to dye concentration in a range of 0.07-2.5 microgram/ml. Beginning at 5 microgram/ml (10-(5) M/1) all three compounds show a sharp decrease of fluorescence intensity with further increasing concentration. Practical aspects of these data for the immunofluorescence method are discussed.

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