scholarly journals Chemical Synthesis and Characterization of Poly(poly(ethylene glycol) methacrylate)-Grafted CdTe Nanocrystals via RAFT Polymerization for Covalent Immobilization of Adenosine

Polymers ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 77 ◽  
Author(s):  
Trinh Duy Nguyen ◽  
Hieu Vu-Quang ◽  
Thanh Sang Vo ◽  
Duy Chinh Nguyen ◽  
Dai-Viet N. Vo ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Photoelectron Spectroscopy ◽  
Raft Polymerization ◽  
Condensation Reaction ◽  
Covalent Bond ◽  
Poly Ethylene Glycol ◽  
X Ray ◽  
Glycol Methacrylate ◽  
Cdte Qds ◽  
Poly Ethylene

This paper describes the functionalization of poly(poly(ethylene glycol) methacrylate) (PPEGMA)-grafted CdTe (PPEGMA-g-CdTe) quantum dots (QDs) via surface-initiated reversible addition–fragmentation chain transfer (SI-RAFT) polymerization for immobilization of adenosine. Initially, the hydroxyl-coated CdTe QDs, synthesized using 2-mercaptoethanol (ME) as a capping agent, were coupled with a RAFT agent, S-benzyl S′-trimethoxysilylpropyltrithiocarbonate (BTPT), through a condensation reaction. Then, 2,2′-azobisisobutyronitrile (AIBN) was used to successfully initiate in situ RAFT polymerization to generate PPEGMA-g-CdTe nanocomposites. Adenosine-above-PPEGMA-grafted CdTe (Ado-i-PPEGMA-g-CdTe) hybrids were formed by the polymer shell, which had successfully undergone bioconjugation and postfunctionalization by adenosine (as a nucleoside). Fourier transform infrared (FT-IR) spectrophotometry, energy-dispersive X-ray (EDX) spectroscopy, thermogravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy results indicated that a robust covalent bond was created between the organic PPEGMA part, cadmium telluride (CdTe) QDs, and the adenosine conjugate. The optical properties of the PPEGMA-g-CdTe and Ado-i-PPEGMA-g-CdTe hybrids were investigated by photoluminescence (PL) spectroscopy, and the results suggest that they have a great potential for application as optimal materials in biomedicine.

Establishing Chemical Bond Layer of Poly(Ethylene Glycol) on NiTi Alloy Surface

2013 ◽  
Vol 785-786 ◽  
pp. 578-581
Author(s):  
Hong Yan Yu ◽  
Lian Cai Wang ◽  
Yan Li ◽  
Xin Miao Zeng ◽  
Xin Qing Zhao
Keyword(s):  
Ethylene Glycol ◽  
Photoelectron Spectroscopy ◽  
Niti Alloy ◽  
Covalent Bond ◽  
Niti Shape Memory Alloy ◽  
Poly Ethylene Glycol ◽  
Γ Irradiation ◽  
Piranha Solution ◽  
Bond Layer ◽  
Poly Ethylene

To get bioorganic surface with improving biological properties, NiTi shape memory alloy was bonded poly (ethylene glycol) (PEG) by sequentially piranha solution treating, silanizing, and then γ-ray irradiation induced grafting. Piranha solution treating gave hydroxylated surfaces for the benefit of next silanization. The trichlorovinylsilane (TCVS) was performed as a bridge to covalent bond treated NiTi substrates and PEG by γ-irradiation. X-ray photoelectron spectroscopy (XPS) was used to indicate that PEG was bonded on silanized NiTi surface by irradiation. Osteoblast culture of 1 day and methyl-thiazol-tetrazolium (MTT) assay showed that PEG bonded on NiTi surface enhanced cell proliferation and cell amount increased significantly with increasing the concentration of bonded PEG.

Immobilization of Poly(Ethylene Glycol) Terminated with Amine to Titanium Surface by Electrodeposition

2006 ◽  
Vol 15-17 ◽  
pp. 205-208
Author(s):  
Yuta Tanaka ◽  
Hisashi Doi ◽  
Yasuhiko Iwasaki ◽  
T. Yoneyama ◽  
Takao Hanawa
Keyword(s):  
Ethylene Glycol ◽  
Photoelectron Spectroscopy ◽  
Titanium Surface ◽  
Blood Compatibility ◽  
Poly Ethylene Glycol ◽  
X Ray ◽  
Artificial Blood Vessels ◽  
The Difference ◽  
Poly Ethylene ◽  
Convenient Technique

In many applications such as catheters, artificial blood vessels and diagnostic sensors, blood compatibility or prevention of adhesion of platelet is required. The preferred way to control these purposes is to eliminate or drastically reduce the adsorption of proteins. Surface modification with Poly(ethylene glycol), PEG has long been known to reduce undesirable protein adsorption. No technique for the immobilization of PEG to base metal has been developed. In this study, PEG terminated at both terminals or one terminal with amine bases was immobilized onto titanium surface by immersion or electrodeposition. The bonding manners of PEG onto titanium, which involve directionality of terminated amines and chemical bonding states of interface between the deposited PEG layer and TiO2, were characterized using X-ray photoelectron spectroscopy, XPS. As a result, terminated amines locate inside of the PEG layer and combine mainly with TiO2 as stable NHO by electrodeposition, while amines randomly exist and show mainly unstable bonding with TiO2 by immersion. Moreover, the difference of amine termination leads to different bonding manners, U-shape in PEG terminated both terminals and brush in PEG terminated one terminal. This immobilization process is one-stage convenient technique and useful for all electroconductive and morphological materials.

Nanocomposite polymer electrolytes based on poly(poly(ethylene glycol)methacrylate), MMT or ZSM-5 formulated with LiTFSI and PYR11TFSI for Li-ion batteries

RSC Advances ◽  
2016 ◽  
Vol 6 (9) ◽  
pp. 7249-7259 ◽  
Author(s):  
J. Cardoso ◽  
A. Mayrén ◽  
I. C. Romero-Ibarra ◽  
D. P. Nava ◽  
J. Vazquez-Arenas
Keyword(s):  
Ethylene Glycol ◽  
Polymer Electrolytes ◽  
Li Ion Batteries ◽  
Poly Ethylene Glycol ◽  
Glycol Methacrylate ◽  
Nanocomposite Polymer ◽  
Li Ion ◽  
Nanocomposite Electrolytes ◽  
Poly Ethylene ◽  
Nanocomposite Polymer Electrolytes

Novel poly(poly(ethylenglycol)methacrylate) nanocomposite electrolytes based on montmorillonite and zeolite; and functionalized with LiTFSI and PYR11TFSI are synthetized for Li-ion batteries.

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