Synthesis of some silyl derivatives of graphene oxide

2021 ◽  
Vol 20 (2) ◽  
pp. 119-132
Author(s):  
Mohammad Ghaleh Assadi ◽  
Maryam Ziaei ◽  
Ebrahim Rezaii
Keyword(s):  
Thermal Stability ◽  
Graphene Oxide ◽  
Methacrylic Acid ◽  
Green Catalyst ◽  
Silyl Ethers ◽  
Network Polymers ◽  
Silyl Derivatives ◽  
Derivatives Of

In this work, we synthesized some organosilicon derivatives of graphene oxide (GO) containing various groups such as trimethyl, triethyl, dimethyl-tert-Bu, and dimethyl-vinyl. Also, some reactions were done in the presence of DES, as catalyst. This green catalyst improved the yields of reactions successfully. Synthesis of methoxy, and ethoxy vinyl silyl ethers of GO were done. In this work, hybrid organic-inorganic was done. In the next step, network polymers of GO with styrene, and methacrylic acid (MAA) were done. Incorporation of organosilicon groups were modified GO properties for example thermal stability or it.

scholarly journals Synthesis and characterization of new macromolecule systems for colon-specific drug delivery

e-Polymers ◽  
2007 ◽  
Vol 7 (1) ◽  
Author(s):  
M. Galehassadi ◽  
M. Mahkam ◽  
F. Hosseinzadeh
Keyword(s):  
Drug Delivery ◽  
In Vitro Release ◽  
Network Polymers ◽  
Release Studies ◽  
Silyl Groups ◽  
Silyl Derivatives ◽  
Derivatives Of ◽  
Vitro Release

AbstractNetwork polymers containing silyl groups were synthesized. Silyl derivatives of 2-hydroxyethylmethacrylate (HEMA), and methacrylic acid (MAA) were copolymerized with 1,2-bis(vinylphenyl)ethane (BVPE) and divinylbenzene (DVB) as cross-linking agents by radical polymerization using α,α′-azobis (isobutyronitrile) (AIBN) as initiator to produce network polymers. Then mesalasine (MZ) were loaded to these network polymers, and amount of drug entrapped was determined. In vitro release studies showed that drug delivery property was modified and showed considerable difference in swelling at pH 1 and 7.4. Incorporation of silyl groups in new macromolecule system modified network polymers for drug delivery. Monomers and polymers were characterized by spectroscopic methods.

scholarly journals Extraordinary thermal behavior of graphene oxide in air for electrode applications

2021 ◽  
Author(s):  
Joong Tark Han ◽  
Joon Young Cho ◽  
Jeong Hoon Kim
Keyword(s):  
Thermal Stability ◽  
Graphene Oxide ◽  
Physical Properties ◽  
Thermal Behavior ◽  
Stability Of Solution ◽  
Exfoliated Graphene ◽  
Potential Applications ◽  
Thermal Stability Of

The thermal stability of solution-exfoliated graphene oxide (GO) in air is one of the most important physical properties influencing its potential applications. To date, majority of the GO prepared by...

Preparation and Pyrolysis of Stereoisomeric Bromobicyclo[n.1.0]alkanes ( n = 6, 8 , 10)

1987 ◽  
Vol 42 (4) ◽  
pp. 489-494 ◽  
Author(s):  
Eckehard V. Dehmlow ◽  
Roland Kramer
Keyword(s):  
Thermal Stability ◽  
Gas Phase ◽  
Condensed Phase ◽  
Secondary Products ◽  
Gas Phase Reactions ◽  
Stereoselective Reduction ◽  
Derivatives Of ◽  
Thermal Stability Of

Abstract The title compounds la-3c were prepared by stereoselective reduction of the respective dibromides. Pyrolysis gave allylic bromides (8, 9, 11) as primary and dienes (10, 12) as secondary products. Product ratios were independent of the stereochemistry of the starting materials. No differences of the rearrangement rates of the stereoisomers were observed in gas phase reactions of the derivatives of bicyclo[6.1.0]- and bicyclo[8.1.0]alkanes. With the larger bicyclo[10.1.0] derivatives, however, distinct differences in the thermal stability of cis-trans-isomers4c/5c or 2c/3c were found in condensed phase.

Phase transfer catalytic synthesis of silyl derivatives of heterocyclic thiols

1999 ◽  
Vol 35 (9) ◽  
pp. 1052-1058 ◽  
Author(s):  
E. Abele ◽  
K. Rubina ◽  
R. Abele ◽  
I. Sleiksha ◽  
E. Lukevics
Keyword(s):  
Phase Transfer ◽  
Catalytic Synthesis ◽  
Silyl Derivatives ◽  
Derivatives Of
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