SAXS, FESEM AND BET STUDIES OF MESOPOROUS CATALYST SBA-15CONTAINING ZINC PORPHYRIN FOR EPOXIDATION OF LIMONENE

2015 ◽  
Vol 78 (3-2) ◽  
Author(s):  
Nurafiqah Saadon ◽  
Salasiah Endud ◽  
Mohd Bakri Bakar ◽  
Hendrik O. Lintang ◽  
Nurliana Roslan
Keyword(s):  
Ethylene Glycol ◽  
Self Assembly ◽  
Ammonium Acetate ◽  
Zinc Acetate Dihydrate ◽  
Sol Gel ◽  
Hexagonal Structure ◽  
Poly Ethylene Glycol ◽  
Epoxidation Reaction ◽  
Poly Ethylene ◽  
Poly Propylene

SBA-15 nanoporous silica was prepared by cooperative self-assembly of tetraethylorthosilicate precursor in the presence of poly(ethylene glycol)–block–poly(propylene glycol)–block–poly(ethylene glycol) copolymer surfactant and functionalized with (3-aminopropyl) triethoxysilane (APTES) via sol-gel reaction to obtain NH2-SBA-15. The metalloporphyrin, [meso-tetrakis-(p-chlorophenyl)porphyrinato]Zn(II) (ZnTClPP) was synthesized from the reaction of meso-tetrakis-(p-chlorophenyl) porphyrin (H2TClPP) using zinc acetate dihydrate as a metal source and then immobilized on SBA-15 surface. The material, NH2-SBA-15-ZnP was characterized by SAXS, FESEM and BET studies and showed a similar pattern as SBA-15 indicating that the mesoporous hexagonal structure of SBA-15 was still retained. Then, the material was applied to catalyze the epoxidation of limonene, using H2O2 / ammonium acetate at various temperatures and conditions. All the products formed from the epoxidation reaction were analyzed using GC-FID and GC-MS.  

Template Assisted Ultrasonic Process Synthesis and Luminescent Properties of Eu3+ Doped LaPO4 Nanocrystals

2010 ◽  
Vol 148-149 ◽  
pp. 938-942
Author(s):  
Yan Bo Wu ◽  
Peng Sun ◽  
Hong Quan Yu ◽  
Si Si Zeng
Keyword(s):  
Ethylene Glycol ◽  
Cetyltrimethylammonium Bromide ◽  
Luminescent Properties ◽  
Hexagonal Structure ◽  
Process Synthesis ◽  
Poly Ethylene Glycol ◽  
Ultrasonic Time ◽  
Ultrasonic Process ◽  
Poly Ethylene ◽  
Poly Propylene

Polyvinglpyrrolidone (PVP), cetyltrimethylammonium bromide (CTAB), and poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol) (P123) were used as templates, respectively. The morphology, structure and luminescent properties of the products were characterized and studied. The results show that all the products are pure LaPO4 with hexagonal structure. Comparing with the morphologies of LaPO4:Eu3+ nanocrystals prepared with PVP and CTAB as templates, the LaPO4:Eu3+ nanocrystals with P123 as template present regular spherical structure. The sizes of all products are in the range of 50–120 nm. When ultrasonic time was 2 h, the tendency, intensity and stability of fluorescent irradiation is obviously difference with different templates. In addition, the luminescent intensity of the LaPO4:Eu3+ nanocrystals using PVP as template is the strongest and using P123 as template is the weakest. All above results indicate that the template kinds have played an important role in the morphology and luminescent properties of the LaPO4:Eu3+ nanocrystals.

scholarly journals Immobilization of metalloporphyrin on functionalized SBA-15 nanoporous silica

2016 ◽  
Vol 11 (4) ◽  
Author(s):  
Nurafiqah Saadon ◽  
Salasiah Endud ◽  
Mohd Bakri Bakar ◽  
Mahsa Khoshkhooy Yazdi
Keyword(s):  
Nmr Spectroscopy ◽  
Ethylene Glycol ◽  
Sol Gel ◽  
Soret Band ◽  
Nanoporous Silica ◽  
Poly Ethylene Glycol ◽  
Metal Source ◽  
Heterogenous Catalyst ◽  
Poly Ethylene ◽  
Poly Propylene

SBA-15 nanoporous silica was prepared by cooperation assembly of tetraethylorthosilicate  precursor in the presence of poly (ethylene glycol)–block- poly (propylene glycol)–block- poly (ethylene glycol) copolymer surfactant and functionalized with (3-aminopropyl) triethoxysilane (APTES) via sol-gel reaction to obtain APTES-SBA-15. Tetra-(p-chlorophenyl) porphyrin (TClPP) was synthesized using modified Alder- Longo method. Zinc was inserted into the TClPP using zinc acetate as a metal source The existance of zinc in porphyrin was confirmed by the appearance of Soret band and Q band in UV- vis spectra. ZnTClPP was also characterized using FTIR and NMR spectroscopy SBA-15 was modified with APTES to immobilize the metalloporphyrin on SBA-15 surface. The product (NH-SBA-15 ZnP) can be used as a heterogenous catalyst in various reactions. The formation of this material was confirmed by FTIR spectroscopy, XRD and BET adsorption. 

Synthesis and self-assembly behaviour of poly(Nα-Boc-l-tryptophan)-block-poly(ethylene glycol)-block-poly(Nα-Boc-l-tryptophan)

RSC Advances ◽  
2016 ◽  
Vol 6 (29) ◽  
pp. 24142-24153
Author(s):  
Andreea S. Voda ◽  
Kevin Magniez ◽  
Nisa V. Salim ◽  
Cynthia Wong ◽  
Qipeng Guo
Keyword(s):  
Drug Delivery ◽  
Ethylene Glycol ◽  
Self Assembly ◽  
Triblock Copolymers ◽  
Potential Drug ◽  
Poly Ethylene Glycol ◽  
Drug Delivery Applications ◽  
Poly Ethylene ◽  
First Time

We report for the first time the use of Nα-Boc-l-tryptophan for the synthesis of amphiphilic BAB triblock copolymers for potential drug delivery applications.

scholarly journals Bioactive organic/inorganic hybrids with improved mechanical performance

2015 ◽  
Vol 3 (7) ◽  
pp. 1379-1390 ◽  
Author(s):  
Ailing Li ◽  
Hong Shen ◽  
Huihui Ren ◽  
Chen Wang ◽  
Decheng Wu ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Mechanical Performance ◽  
Sol Gel ◽  
Poly Ethylene Glycol ◽  
Interpenetrating Networks ◽  
Poly Ethylene

New sol–gel functionalized poly-ethylene glycol (PEGM)/SiO2–CaO hybrids were prepared with interpenetrating networks of silica and PEGM through the formation of Si–O–Si bonds.

A chitosan/poly(ethylene glycol)-ran-poly(propylene glycol) blend as an eco-benign separator and binder for quasi-solid-state supercapacitor applications

2019 ◽  
Vol 3 (3) ◽  
pp. 760-773 ◽  
Author(s):  
M. Raja ◽  
Balaji Sadhasivam ◽  
Janraj Naik R ◽  
Dhamodharan R ◽  
Kothandaraman Ramanujam
Keyword(s):  
Activated Carbon ◽  
Solid State ◽  
Ethylene Glycol ◽  
Propylene Glycol ◽  
Tamarindus Indica ◽  
Poly Ethylene Glycol ◽  
Active Electrode ◽  
Poly Ethylene ◽  
Poly Propylene ◽  
Supercapacitor Applications

In this study chitosan/poly(ethylene glycol)-ran-poly(propylene glycol) blend was developed as separator and binder for supercapacitor (SC) applications. The activated carbon (ACTS-900) derived fromTamarindus indicaseeds is used as active electrode material.

Synthesis of Fluorescent Magnetic and Plasmonic-Hybrid Multifunctional Nanopaticles

2014 ◽  
Vol 1081 ◽  
pp. 161-164
Author(s):  
Xue Mei Li ◽  
Zheng Guan ◽  
Hong Ling Liu ◽  
Jun Hua Wu ◽  
Xian Hong Wang ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Zno Nanoparticles ◽  
Poly Ethylene Glycol ◽  
Visible Absorption ◽  
Transmission Electron ◽  
Good Magnetic Property ◽  
Uv Visible ◽  
Poly Ethylene ◽  
Poly Propylene

FeAu/ZnO nanoparticles were successfully synthesized by nanoemulsion process with the use of poly (ethylene glycol)-block-poly (propylene glycol)-block-poly (ethylene glycol) as the surfactant. The characterization of the FeAu/ZnO nanoparticles was performed using X-ray powder diffraction (XRD), transmission electron microscopy (TEM) and UV-visible absorption spectroscopy, showing that the polymer-laced nanoparticles reveal high crystallinity, excellent dispersibility and well defined optical performance. The process of solvent dispersion-collection of FeAu/ZnO nanoparticles indicates that the nanoparticles possess good magnetic property for applications.

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