Luminescence Properties of Eu:KCaPO4 Ceramics That Generate New Luminescent Centers upon X-ray Irradiation

Eu2+ Doped Ca-α-SiAlON phosphor have been synthesized from SiO2, Al2O3, CaCO3, Eu(NO3)3,carbon powders by carbothermal reduction–nitridation (CRN). Using X-ray Diffractometer (XRD) and fluorescent spectrophotometer, the influences of the phase content of the sintered samples after different soaking time at 1390°C and their luminescence properties were studied. The pure Ca-α-SiAlON:Eu2+ were prepared at processing temperatures of 1390°C in a holding time of 8 h. Ca-α-SiAlON:Eu2+ had high adsorption in the UV–visible spectral region. Two bands were observed in the emission spectrum centered at about 459 and 545 nm exited at 290nm. And two excitation bands located at about 297nm, 300-400nm were observed in the excitation spectrum with monitored at emission wavelength of 469nm or 550nm respectively. The morphology of the samples was examined via SEM, TEM. Ca/Eu co-doped α-SiAlON powders had hollow sphere morphology and it is composed of large numbers of very fine particles of around 30 to 70 nm in diameter. Elemental distribution was investigated using an EDS attached to a scanning electron microscopy (SEM). The sintered sample has a composition commonly seen for α-SiAlON.

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Optical and X-ray-induced Luminescence Properties of Calcium Phosphate of Transparent Ceramic Form

Sensors and Materials ◽

10.18494/sam.2020.2742 ◽

2020 ◽

Vol 32 (4) ◽

pp. 1411

Author(s):

Takumi Kato ◽

Daisuke Nakauchi ◽

Noriaki Kawaguchi ◽

Takayuki Yanagida

Keyword(s):

Calcium Phosphate ◽

Transparent Ceramic ◽

Luminescence Properties ◽

X Ray

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The first actinide polyiodate: a complex multifunctional compound with promising X-ray luminescence properties and proton conductivity

Chemical Communications ◽

10.1039/d0cc06835g ◽

2021 ◽

Author(s):

Gabriel L. Murphy ◽

Yaxing Wang ◽

Philip Kegler ◽

Yumin Wang ◽

Shuao Wang ◽

...

Keyword(s):

Proton Conductivity ◽

Luminescence Properties ◽

X Ray

The synthesis of the first actinide polyiodate, K4[(UO2)2(IO3)6(I4O11)]·(HIO3)4(H2O)6 (UP-1), is described and its X-ray luminescent and proton conductivity properties are examined.

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Synthesis, Crystal Structures and Luminescence Properties of Three New Cadmium 3D Coordination Polymers

Molecules ◽

10.3390/molecules25112465 ◽

2020 ◽

Vol 25 (11) ◽

pp. 2465

Author(s):

Hai-Yan Ju ◽

Gang Zhang ◽

Ming Yang ◽

De-Zheng Liu ◽

Yong-Sheng Yang ◽

...

Keyword(s):

Room Temperature ◽

Coordination Complexes ◽

Luminescence Properties ◽

Solvothermal Reaction ◽

X Ray Diffraction ◽

Reaction Conditions ◽

X Ray ◽

Π Stacking Interaction ◽

2D Network ◽

3D Framework

The new rigid planar ligand 2,5-bis(3-(pyridine-4-yl)phenyl)thiazolo[5,4-d]thiazole (BPPT) has been synthesized, which is an excellent building block for assembling coordination polymer. Under solvothermal reaction conditions, cadmium ion with BPPT in the presence of various carboxylic acids including (1,1′-biphenyl)-4,4′-dicarboxylic acid (BPDC), isophthalic acid (IP), and benzene-1,3,5-tricarboxylic acid (BTC) gave rise to three coordination complexes, viz, [Cd(BPPT)(BPDA)](BPPT)n (1), [Cd(BPPT) (IP)] (CH3OH) (2), and [Cd3(BPPT)3(BTC)2(H2O)2] (3). The structures of 1, 2, and 3 were characterized by single crystal X-ray diffraction. The IR spectra as well as thermogravimetric and luminescence properties were also investigated. Complex 1 is a two-dimensional (2D) network and further stretched to a 3D supramolecular structure through π–π stacking interaction. The complexes 2 and 3 show 3D framework. The complexes 1, 2, and 3 exhibited luminescence property at room temperature.

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