Preparation, and Luminescence Properties of SiO2@Sm(MABA-Si)phen Core-Shell Structure Nanometer Composite

A novel ternary samarium complex was prepared using HOOCC6H4N(CONH(CH2)3Si- (OCH2CH3)3)2 (MABA-Si) as first ligand, and phen as second ligand. The corresponding SiO2@Sm(MABA-Si)phen core-shell structure nanometer composite was synthesized as well, and the silica spheres was the core, and the ternary samarium complex was the shell layer. The ternary samarium complex has been characterized by element analysis, molar conductivity and IR spectra. The results show that the chemical formula of the complex is Sm(MABA-Si)(phen)2(ClO4)3·2H2O. The fluorescent spectra illustrat that the luminescence properties of the samarium complex are superior. The core-shell structure of SiO2@Sm(MABA-Si)phen nanometer composite is characterized by SEM, TEM and IR spectra. The SiO2@Sm(MABA-Si)phen core-shell structure composites exhibit stronger emission intensity than the ternary samarium complex. The fluorescence lifetime of the complex and core-shell structure composite is measured as well.

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Luminescence Properties of SiO2@Eu(phen-Si) (sulphoxide) Core-Shell Nanometer Composite

MATEC Web of Conferences ◽

10.1051/matecconf/201814204003 ◽

2018 ◽

Vol 142 ◽

pp. 04003

Author(s):

Yi-Lian Li ◽

Wen-Xian Li ◽

Yu-Shan Zheng

Keyword(s):

Ir Spectra ◽

Shell Structure ◽

Europium Complex ◽

Molar Conductivity ◽

Core Shell ◽

Silica Spheres ◽

Element Analysis ◽

The Core ◽

Core Shell Structure ◽

Different Thickness

A novel ternary europium complex Eu(Phen-Si)·(H2L)2·(ClO4)3·6H2O was prepared using (phen)-N-(CONH(CH2)3Si(OCH2CH3)3)2 (Phen-Si) as the first ligand and 2-carboxyphenyl carboxymethyl sulphoxide (H2L) as the second ligand. The corresponding different thickness core-shell structure SiO2@Eu(phen-Si)·L nano composites were synthesized, with silica spheres as core, ternary europium complex (Eu(Phen-Si)·(H2L)2·(ClO4)3) as shell. The ternary europium complex has been characterized by element analysis, molar conductivity, and IR spectra. The SiO2@Eu(phen-Si)·L core-shell structure composite was characterized by TEM and IR spectra. Core-shell structure composites exhibited stronger fluorescence properties than that of the ternary europium complex. The emission intensity of the two core-shell composites was 1.79, 3.99 times stronger than the ternary europium complex, respectively. The fluorescence lifetime of the core-shell structure composites were longer than the ternary europium complex.

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Preparation, characterization and luminescence properties of core–shell ternary terbium composites SiO 2(600) @Tb(MABA-Si)•L

Royal Society Open Science ◽

10.1098/rsos.171655 ◽

2018 ◽

Vol 5 (3) ◽

pp. 171655 ◽

Cited By ~ 3

Author(s):

Yang-Yang Ma ◽

Wen-Xian Li ◽

Yu-Shan Zheng ◽

Jin-Rong Bao ◽

Yi-Lian Li ◽

...

Keyword(s):

Shell Structure ◽

Luminescence Decay ◽

Luminescence Properties ◽

Core Shell ◽

Element Analysis ◽

Strong Emission ◽

The Core ◽

Potential Applications ◽

Core Shell Structure ◽

Terbium Complexes

Two novel core–shell structure ternary terbium composites SiO 2(600) @Tb(MABA-Si)·L(L:dipy/phen) nanometre luminescence materials were prepared by ternary terbium complexes Tb(MABA-Si)·L 2 ·(ClO 4 ) 3 ·2H 2 O shell grafted onto the surface of SiO 2 microspheres. And corresponding ternary terbium complexes were synthesized using (CONH(CH 2 ) 3 Si(OCH 2 CH 3 ) 3 ) 2 (denoted as MABA-Si) as first ligand and L as second ligand coordinated with terbium perchlorate. The as-synthesized products were characterized by means of IR spectra, 1 HNMR, element analysis, molar conductivity, SEM and TEM. It was found that the first ligand MABA-Si of terbium ternary complex hydrolysed to generate the Si–OH and the Si–OH condensate with the Si–OH on the surface of SiO 2 microspheres; then ligand MABA-Si grafted onto the surface of SiO 2 microspheres. The diameter of SiO 2 core of SiO 2(600) @Tb(MABA-Si)·L was approximately 600 nm. Interestingly, the luminescence properties demonstrate that the two core–shell structure ternary terbium composites SiO 2(600) Tb(MABA-Si)·L(dipy/phen) exhibit strong emission intensities, which are 2.49 and 3.35 times higher than that of the corresponding complexes Tb(MABA-Si)·L 2 ·(ClO 4 ) 3 ·2H 2 O, respectively. Luminescence decay curves show that core–shell structure ternary terbium composites have longer lifetime. Excellent luminescence properties enable the core–shell materials to have potential applications in medicine, industry, luminescent fibres and various biomaterials fields.

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A SERS Study of Charge Transfer Process in Au Nanorod–MBA@Cu2O Assemblies: Effect of Length to Diameter Ratio of Au Nanorods

Nanomaterials ◽

10.3390/nano11040867 ◽

2021 ◽

Vol 11 (4) ◽

pp. 867

Author(s):

Lin Guo ◽

Zhu Mao ◽

Sila Jin ◽

Lin Zhu ◽

Junqi Zhao ◽

...

Keyword(s):

Charge Transfer ◽

Shell Structure ◽

Shell Structures ◽

Core Shell ◽

Absorption Bands ◽

Au Nanorods ◽

The Core ◽

Band Position ◽

Surface Enhanced Raman ◽

Core Shell Structure

Surface-enhanced Raman scattering (SERS) is a powerful tool in charge transfer (CT) process research. By analyzing the relative intensity of the characteristic bands in the bridging molecules, one can obtain detailed information about the CT between two materials. Herein, we synthesized a series of Au nanorods (NRs) with different length-to-diameter ratios (L/Ds) and used these Au NRs to prepare a series of core–shell structures with the same Cu2O thicknesses to form Au NR–4-mercaptobenzoic acid (MBA)@Cu2O core–shell structures. Surface plasmon resonance (SPR) absorption bands were adjusted by tuning the L/Ds of Au NR cores in these assemblies. SERS spectra of the core-shell structure were obtained under 633 and 785 nm laser excitations, and on the basis of the differences in the relative band strengths of these SERS spectra detected with the as-synthesized assemblies, we calculated the CT degree of the core–shell structure. We explored whether the Cu2O conduction band and valence band position and the SPR absorption band position together affect the CT process in the core–shell structure. In this work, we found that the specific surface area of the Au NRs could influence the CT process in Au NR–MBA@Cu2O core–shell structures, which has rarely been discussed before.

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Construction of MOFs-Shell Porous Materials and Performance Study in Selective Adsorption and Separation of Benzene Pollutants

Dalton Transactions ◽

10.1039/d1dt01205c ◽

2021 ◽

Author(s):

Yu Qiao ◽

Na Lv ◽

Dong Li ◽

Hongji Li ◽

Xiangxin Xue ◽

...

Keyword(s):

Porous Materials ◽

Shell Structure ◽

Selective Adsorption ◽

Core Shell ◽

Architecture Design ◽

Performance Study ◽

The Core ◽

Core Shell Structure ◽

And Performance ◽

Sacrificial Agent

Metastable Cu2O is an attractive material for the architecture design of integrated nanomaterials. In this context, Cu2O was used as the sacrificial agent to form the core-shell structure of Cu2O@HKUST-1...

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Preparation of polyacrylamide microspheres with core–shell structure via surface-initiated atom transfer radical polymerization

RSC Advances ◽

10.1039/c6ra22615a ◽

2016 ◽

Vol 6 (94) ◽

pp. 91463-91467 ◽

Cited By ~ 4

Author(s):

Peng Zhang ◽

Shixun Bai ◽

Shilan Chen ◽

Dandan Li ◽

Zhenfu Jia ◽

...

Keyword(s):

Atom Transfer Radical Polymerization ◽

Radical Polymerization ◽

Shell Structure ◽

Core Shell ◽

Atom Transfer ◽

The Core ◽

Core Shell Structure

Well defined core–shell microspheres were prepared by surface-initiated atom transfer radical polymerization with pre-crosslinked polyacrylamide as the core and non-crosslinked polyacrylamide as the shell.

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Core–shell stability of nanoparticles plays an important role for overcoming the intestinal mucus and epithelium barrier

Journal of Materials Chemistry B ◽

10.1039/c6tb01199c ◽

2016 ◽

Vol 4 (35) ◽

pp. 5831-5841 ◽

Cited By ~ 11

Author(s):

Min Liu ◽

Lei Wu ◽

Xi Zhu ◽

Wei Shan ◽

Lian Li ◽

...

Keyword(s):

Shell Structure ◽

Core Shell ◽

The Core ◽

Shell Stability ◽

Intestinal Mucus ◽

Core Shell Structure ◽

The Stability

The stability of the core–shell structure plays an important role in the nanoparticles ability to overcome both the mucus and epithelium absorption barrier.

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Characterization of Fe3O4@CS@NMDP magnetic nanoparticles with core–shell structure prepared by chemical cross-linking method

Functional Materials Letters ◽

10.1142/s1793604717500564 ◽

2017 ◽

Vol 10 (05) ◽

pp. 1750056 ◽

Cited By ~ 3

Author(s):

Huiping Shao ◽

Jiangcong Qi ◽

Tao Lin ◽

Yuling Zhou ◽

Fucheng Yu

Keyword(s):

Magnetic Nanoparticles ◽

Shell Structure ◽

High Performance ◽

Cross Linking ◽

Composite Particles ◽

Core Shell ◽

The Core ◽

Targeting Delivery ◽

Core Shell Structure ◽

Chemical Cross Linking

The core–shell structure composite magnetic nanoparticles (NPs), Fe3O4@chitosan@nimodipine (Fe3O4@CS@NMDP), were successfully synthesized by a chemical cross-linking method in this paper. NMDP is widely used for cardiovascular and cerebrovascular disease prevention and treatment, while CS is of biocompatibility. The composite particles were characterized by an X-ray diffractometer (XRD), a Fourier transform infrared spectroscopy (FT-IR), a transmission electron microscopy (TEM), a vibrating sample magnetometers (VSM) and a high performance liquid chromatography (HPLC). The results show that the size of the core–shell structure composite particles is ranging from 12[Formula: see text]nm to 20[Formula: see text]nm and the coating thickness of NMDP is about 2[Formula: see text]nm. The saturation magnetization of core–shell composite NPs is 46.7[Formula: see text]emu/g, which indicates a good potential application for treating cancer by magnetic target delivery. The release percentage of the NMDP can reach 57.6% in a short time of 20[Formula: see text]min in the PBS, and to 100% in a time of 60[Formula: see text]min, which indicates the availability of Fe3O4@CS@NMDP composite NPs for targeting delivery treatment.

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The use of galvanic displacement in synthesizing Pt(Cu) catalysts with the core-shell structure

Russian Journal of Electrochemistry ◽

10.1134/s1023193510100150 ◽

2010 ◽

Vol 46 (10) ◽

pp. 1189-1197 ◽

Cited By ~ 31

Author(s):

B. I. Podlovchenko ◽

T. D. Gladysheva ◽

A. Yu. Filatov ◽

L. V. Yashina

Keyword(s):

Shell Structure ◽

Core Shell ◽

Galvanic Displacement ◽

The Core ◽

Cu Catalysts ◽

Core Shell Structure

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Seed-mediated synthesis of bimetallic ruthenium–platinum nanoparticles efficient in cinnamaldehyde selective hydrogenation

Dalton Transactions ◽

10.1039/c3dt53539h ◽

2014 ◽

Vol 43 (24) ◽

pp. 9283-9295 ◽

Cited By ~ 15

Author(s):

Xueqiang Qi ◽

M. Rosa Axet ◽

Karine Philippot ◽

Pierre Lecante ◽

Philippe Serp

Keyword(s):

Selective Hydrogenation ◽

Platinum Nanoparticles ◽

Shell Structure ◽

Core Shell ◽

The Core ◽

Core Shell Structure ◽

Seed Mediated

The two-step synthesis of small ruthenium–platinum nanoparticles leads to the formation of a core–shell structure. The catalytic results provide supplementary evidence of the core–shell structure.

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A cosolvency effect on tunable thermosensitive core–shell nanoparticle gels

Soft Matter ◽

10.1039/c5sm00448a ◽

2015 ◽

Vol 11 (19) ◽

pp. 3936-3945 ◽

Cited By ~ 5

Author(s):

Sang Min Lee ◽

Young Chan Bae

Keyword(s):

Transition Temperature ◽

Shell Structure ◽

Core Shell ◽

The Core ◽

Volume Transition ◽

Core Shell Structure ◽

Propanol Solution

Schematic depiction of a core–shell structure composed of the PMMA core and the PHEMA shell, and the influence of three co-solvents on the volume transition temperature of the core–shell gels in 1-propanol solution.

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