Synthesis and Luminescence Properties of Tb3+-Doped Hydroxyapatites

2011 ◽  
Vol 399-401 ◽  
pp. 1582-1587
Author(s):  
Su Ping Huang ◽  
Jun Zhu ◽  
Ke Chao Zhou
Keyword(s):  
Aspect Ratio ◽  
Fluorescence Intensity ◽  
Doping Concentration ◽  
Doping Content ◽  
Fluorescent Properties ◽  
Strong Fluorescence ◽  
Active Growth ◽  
Ph Values ◽  
Structure Morphology ◽  
Ultraviolet Ray

In this paper, the terbium -doped nano-HA powders with strong fluorescence was prepared by hydrothermal synthesis and its crystal structure，morphology and fluorescent properties are characterized by XRD, TEM, XPS, ICP and PL spectroscopy. Results showed that with the doping concentration of Tb3+increasing, the aspect ratio of Tb3+-doped HA particles decreased, while the fluorescence intensity excited by ultraviolet ray at 272 nm is significantly enhanced. With pH values increased from 6.5 to 10.0, the aspect ratio of Tb3+-doped HA decreased greatly, and the morphology of nano-Tb:HA particles changes from rod particles to equiaxed particles and the actual doping content and the fluorescence intensity tends to increase correspondingly, which can be explained that under alkaline solution, Tb3+was more easier entering the HA crystal, and the Tb3+would substitute the Ca2+ in both hydroxyapatite Ca(Ⅰ) and Ca(Ⅱ) site, which may block the active growth sites of the seed crystals and resulted in the growth rate and the ratio of length to radius decreasing.

Synthesis of a Photochromic Diarylethene Having Thiazole and a Pyridyl Group for Optical Recording

2010 ◽  
Vol 156-157 ◽  
pp. 650-654 ◽  
Author(s):  
Hui Li ◽  
Yong Liang Xia ◽  
Shou Zhi Pu ◽  
Shi Qiang Cui
Keyword(s):  
Fluorescence Intensity ◽  
Optical Storage ◽  
Optical Recording ◽  
Pmma Film ◽  
Fluorescent Properties ◽  
Strong Fluorescence ◽  
Pyridyl Group ◽  
Open Ring

A new unsymmetrical photochromic diarylethene namly 1-(2,4-dimethyl-5- thiazolyl)-2- [(2-methyl-5-(2-pyridyl)-3-thienyl)]perfluorocyclopentene was synthesized, and its photochromic and fluorescent properties were also investigated. The compound exhibited good photochromism both in solution and in PMMA film. In PMMA film, The open-ring isomer of the diarylethene 1 exhibited relatively strong fluorescence at 427 nm when excited at 320 nm. The fluorescence intensity declined along with the photochromism upon irradiation with 297 nm light. Using this dithienylethene 1b as optical storage was performed successfully.

Synthesis and Property of a New Photochromic Diarylethene Bearing Thiophene and a Six-Membered Aryl Unit

2011 ◽  
Vol 197-198 ◽  
pp. 448-451 ◽  
Author(s):  
Hong Liang Liu ◽  
Shou Zhi Pu ◽  
Hui Li ◽  
Gang Liu
Keyword(s):  
Fluorescence Intensity ◽  
Uv Light ◽  
Amorphous Film ◽  
Solution Concentration ◽  
Fluorescent Properties ◽  
Strong Fluorescence ◽  
Photochromic Behavior

A novel photochromic diarylethene based on thiophene and a six-membered aryl moieties 1-[(2-methyl-5-(p-methylphenyl)-3-thienyl)]-2-[(2-trifluoromethylphenyl)]perfluorocyclopentene(1a) has been synthesized. Its properties, including photochromic behavior and fluorescent properties, have been investigated. The results showed that this compound exhibited reversible photochromism, changing from colorless to purple after irradiation with UV light both in solution and in PMMA amorphous film. The fluorescence intensity decreased along with the increase of solution concentration. The diarylethene exhibited relatively strong fluorescence at different solvent.

Synthesis and Optical Property of an Asymmetric Photochromic Diarylethene Derivative Bearing Benzofuran

2011 ◽  
Vol 399-401 ◽  
pp. 1115-1118
Author(s):  
Hui Li ◽  
Shou Zhi Pu ◽  
Shi Qiang Cui
Keyword(s):  
Optical Property ◽  
Fluorescence Intensity ◽  
Uv Light ◽  
Amorphous Film ◽  
Pmma Film ◽  
Fluorescent Properties ◽  
Strong Fluorescence ◽  
Hexane Solution

A new asymmetric photochromic diarylethene bearing a benzofuran unit was synthesized, namely [1-(2-methyl-3-benzofuranyl)-2-(2-methoxyphenyl)]perfluorocyclopentene (1o). Its photochromic and fluorescent properties were investigated, respectively. The compound exhibited reversible photochromism, changing from colorless to red upon irradiation with UV light both in solution and in PMMA film. The diarylethene exhibited relatively strong fluorescence at 410 nm in hexane solution and 462 nm in PMMA amorphous film when excited at 300 and 385 nm, respectively. The fluorescence intensity decreased along with the photochromism both in hexane and PMMA film upon irradiation with 297 nm light.

scholarly journals Synthesis and Properties of Nitrogen-Doped Carbon Quantum Dots Using Lactic Acid as Carbon Source

Materials ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 466
Author(s):  
Kaixin Chang ◽  
Qianjin Zhu ◽  
Liyan Qi ◽  
Mingwei Guo ◽  
Woming Gao ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Lactic Acid ◽  
Fluorescence Quenching ◽  
Functional Groups ◽  
Fluorescence Intensity ◽  
Carbon Quantum Dots ◽  
Nitrogen Doped ◽  
Ph Values ◽  
Wide Range ◽  
Nitrogen Doped Carbon

Nitrogen-doped carbon quantum dots (N-CQDs) were synthesized in a one-step hydrothermal technique utilizing L-lactic acid as that of the source of carbon and ethylenediamine as that of the source of nitrogen, and were characterized using dynamic light scattering, X-ray photoelectron spectroscopy ultraviolet-visible spectrum, Fourier-transformed infrared spectrum, high-resolution transmission electron microscopy, and fluorescence spectrum. The generated N-CQDs have a spherical structure and overall diameters ranging from 1–4 nm, and their surface comprises specific functional groups such as amino, carboxyl, and hydroxyl, resulting in greater water solubility and fluorescence. The quantum yield of N-CQDs (being 46%) is significantly higher than that of the CQDs synthesized from other biomass in literatures. Its fluorescence intensity is dependent on the excitation wavelength, and N-CQDs release blue light at 365 nm under ultraviolet light. The pH values may impact the protonation of N-CQDs surface functional groups and lead to significant fluorescence quenching of N-CQDs. Therefore, the fluorescence intensity of N-CQDs is the highest at pH 7.0, but it decreases with pH as pH values being either more than or less than pH 7.0. The N-CQDs exhibit high sensitivity to Fe3+ ions, for Fe3+ ions would decrease the fluorescence intensity of N-CQDs by 99.6%, and the influence of Fe3+ ions on N-CQDs fluorescence quenching is slightly affected by other metal ions. Moreover, the fluorescence quenching efficiency of Fe3+ ions displays an obvious linear relationship to Fe3+ concentrations in a wide range of concentrations (up to 200 µM) and with a detection limit of 1.89 µM. Therefore, the generated N-CQDs may be utilized as a robust fluorescence sensor for detecting pH and Fe3+ ions.

Properties and Synthesis of a Novel Unsymmetrical Photochromic Diarylethene Functional Material

2012 ◽  
Vol 164 ◽  
pp. 259-262
Author(s):  
Hai Chang Ding ◽  
Chun Hong Zheng ◽  
Shou Zhi Pu
Keyword(s):  
Fluorescence Intensity ◽  
Uv Light ◽  
Optoelectronic Properties ◽  
Pmma Film ◽  
Functional Material ◽  
Strong Fluorescence ◽  
Closed Ring ◽  
Hexane Solution

A new unsymmetrical photochromic diarylethene, 1-(3-thienyl)-2-(2- n-butyl-5-hydroxymethyl-3-thienyl) perfluoroncyclopentene (1a), was synthesized and its optoelectronic properties, such as photochromism and fluorescence in solution and in PMMA film were investigated. This compound exhibited remarkable photochromism, changing from colorless to pink after irradiation with UV light in hexane solution. The new diarylethene also exhibited relatively strong fluorescence by photoirradiation in solution and in PMMA film, and the fluorescence intensity decreased along with the photochromism upon irradiation 297 nm light and its closed-ring isomer showed almost no fluorescence

Utilising an anilido-imino ligand to stabilise zinc-phosphanide complexes: reactivity and fluorescent properties

2019 ◽  
Vol 48 (23) ◽  
pp. 8094-8105
Author(s):  
Dylan Webb ◽  
J. Robin Fulton
Keyword(s):  
Fluorescence Intensity ◽  
Zinc Complexes ◽  
Ancillary Ligand ◽  
Fluorescent Properties

Anilido-imino-based ligands have been used to generate new zinc complexes, including rare zinc phosphanide and phosphinodichalcogenoate complexes. The fluorescence intensity of these compounds is highly dependent upon the non-ancillary ligand.

Synthesis and optical properties of single-crystalline SnS1−xSex nanobelts

2020 ◽  
Vol 35 (4) ◽  
pp. 276-281
Author(s):  
Shengru Wang ◽  
Xiaofang Lai ◽  
Bingsheng Du ◽  
Junhao Ma ◽  
Peihua Wang ◽  
...  
Keyword(s):  
Optical Properties ◽  
Optical Property ◽  
Doping Concentration ◽  
Band Gaps ◽  
Phonon Modes ◽  
Facile Hydrothermal Method ◽  
One Dimensional ◽  
Optical Band Gaps ◽  
Structure Morphology ◽  
Se Doping

In this work, SnS1−xSex ternary nanobelts were synthesized by a facile hydrothermal method without the assistance of surfactants. The structure, morphology, microstructure, compositions, chemical valences, phonon modes, and optical band gaps of the SnS1−xSex nanobelts were characterized in detail. The results indicate that the SnS1−xSex nanobelts have uniform one-dimensional morphology and are single crystals with high crystallinity. Se is incorporated into the SnS lattice to substitute for S-forming ternary SnS1−xSex alloy. With the increase of Se doping concentration, the optical band gaps of the nanobelts gradually decrease from 1.15 to 1.01 eV, confirming the tunable optical property achieved here.

Synthesis and Properties of 1-[2-trifluoromethylpheny-2-[2-methyl-5-(3,5-difluorophenyl)-3-thienyl] perfluorocyclopentene

2013 ◽  
Vol 468 ◽  
pp. 75-78
Author(s):  
Guang Ming Liao ◽  
Shou Zhi Pu ◽  
Zhi Yuan Sun
Keyword(s):  
Absorption Band ◽  
Fluorescence Intensity ◽  
Emission Intensity ◽  
Uv Light ◽  
Fluorescent Properties ◽  
Visible Absorption ◽  
Photostationary State ◽  
Closed Ring ◽  
Open Ring

An asymmetrical photochromic diarylethene 1-[2-trifluoromethylpheny-2-[2-methyl-5-(3,5-difluorophenyl)-3-thienyperfluorocyclopentene (1o) was synthesized and its phtochromic, fluorescent properties in both solution and PMMA films were investigated in detail. This compound exhibited remarkable photochromism, upon irradiation with 297 nm UV light, the colorless solution of 1o turned to plum with a new visible absorption band centered at 544 nm (ε =3.75 × 103 L mol-1 cm-1) attributable to the closed-ring isomer 1c.The fluorescence intensity of diarylethene decreased dramatically along with the photochromism from open-ring isomer to closed-ring isomer in PMMA films and in hexane. The emission intensity of diarylethene 1o in a photostationary state was quenched to ca. 64% in hexane and 27% in PMMA films.

Synthesis and Characterization of Asparagine-Modified and Terbium-Doped Spherical Hydroxyapatite Nanoparticle

2016 ◽  
Vol 697 ◽  
pp. 62-66
Author(s):  
Xiao Feng Xing ◽  
Liang Liang Luo ◽  
Yu Ping Guo ◽  
Wei Min Gao ◽  
Liang Hu
Keyword(s):  
Uv Light ◽  
Raw Materials ◽  
Calcium Nitrate ◽  
Thermal Method ◽  
Fluorescent Properties ◽  
Transmission Electron ◽  
Light Region ◽  
Structure Morphology ◽  
Fluorescence Spectrometer

The spherical hydroxyapatite nanoparticles (HAP) were synthesized by hydro-thermal method, and calcium nitrate, terbium oxide, diammonium hydrogen phosphate were used as raw materials with the help of surfactant L-Asparagine. Meanwhile, different amount of Tb was added to investigate the effect of different terbium dropping amount on the properties of HAP. The structure, morphology and luminescent of the obtained HAP that was characterized via X-ray powder diffraction (XRD), fluorescence spectrometer (PL) and transmission electron microscope (TEM). Results showed that spherical HAP which in average of 30 nm with good dispersion showed remarkable fluorescent properties and their maximum emission were observed at 543 nm, which could be also excited at uv light region of 377 nm.The optimum mole fraction of Tb was 3%. Therefore terbium-doped spherical HAP of prepared sample would be tracked by flourescence.

Efficient Synthesis and Properties of a Photochromic Diarylethene Bearing Thiophene and Isoxazole Moieties

2011 ◽  
Vol 295-297 ◽  
pp. 1070-1073
Author(s):  
Hong Liang Liu ◽  
Gang Liu ◽  
Shi Qiang Cui ◽  
Wei Jun Liu
Keyword(s):  
Uv Light ◽  
Amorphous Film ◽  
Optical Storage ◽  
Efficient Synthesis ◽  
Fluorescent Properties ◽  
Strong Fluorescence ◽  
Closed Ring ◽  
Fluorescence Switch ◽  
Open Ring ◽  
Fluorescence Switching

A novel photochromic diarylethene based on isoxazole moiety was synthesized and its photochromic and fluorescent properties were also investigated. This compound exhibited reversible photochromism, changing from colorless to red after irradiation with UV light both in solution and in poly-methyl methacrylate (PMMA) amorphous film. Also, it exhibited remarkable fluorescence switching in the solid state. The results showed that the diarylethene exhibited a relatively strong fluorescence switch along with the photochromism from open-ring isomer to closed-ring isomer. Using this dithienylethene 1c as optical storage was performed successfully.

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