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Microwave Synthesis (microwave + synthesis)

Distribution by Scientific Domains
Chemistry60%
Polymers and Materials Science30%

Selected Abstracts

Ultrarapid Microwave Synthesis of Superconducting Refractory Carbides

ADVANCED MATERIALS, Issue 44 2009
Simon R. Vallance
Nb1,xTaxC Carbides can be synthesized by high power MW methods in less than 30,s. In situ and ex situ techniques probing changes in temperature and dielectric properties with time demonstrate that the reactions self-terminate as the loss tangent of the materials decreases. The resulting carbides are carbon deficient and superconducting; Tc correlates linearly to unit cell volume, reaching a maximum at NbC. [source]

5rd DPI Workshop on Combinatorial and High-Throughput Experimentation in Polymer Science , Special Focus on Microwave Synthesis,

MACROMOLECULAR RAPID COMMUNICATIONS, Issue 4 2007
Richard Hoogenboom
First page of article [source]

ChemInform Abstract: Parallel Microwave Synthesis of 2-Styrylquinazolin-4(3H)-ones in a High-Throughput Platform Using HPLC/GC Vials as Reaction Vessels.

CHEMINFORM, Issue 50 2009
Mostafa Baghbanzadeh
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

ChemInform Abstract: Microwave Synthesis of Hydrotalcite by Urea Hydrolysis.

CHEMINFORM, Issue 9 2008
Zhiqiang Yang
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

ChemInform Abstract: Solvent-Free Microwave Synthesis of Novel 6-Hydroxypyrimidin-4(1H)-one Derivatives Using Arylmalonates.

CHEMINFORM, Issue 9 2008
Stephanie M. Chichetti
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

Solvent-Free Microwave Synthesis of 4-Hydroxy-3-phenylquinolin-2(1H)-ones and Variants Using Activated Arylmalonates.

CHEMINFORM, Issue 29 2006
Alexey Rivkin
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source]

Microwave Synthesis of Trichlorfon (IIIa) and Its Analogues.

CHEMINFORM, Issue 13 2005
Abdollah Javidan
Abstract For Abstract see ChemInform Abstract in Full Text. [source]

Biodegradable poly(vinyl alcohol)- graft - poly(,-caprolactone) comb-like polyester: Microwave synthesis and its characterization

JOURNAL OF APPLIED POLYMER SCIENCE, Issue 6 2007
Zhaoju Yu
Abstract Poly(vinyl alcohol)-initiated microwave-assisted ring opening polymerization of ,-caprolactone in bulk was investigated, and a series of poly(vinyl alcohol)- graft -poly(,-caprolactone) (PVA- g -PCL) copolymers were prepared, with the degree of polymerization (DP) of PCL side chains and the degree of substitution (DS) of PVA by PCL being in the range of 3,24 and 0.35,0.89, respectively. The resultant comb-like PVA- g -PCL copolymers were confirmed by means of FTIR, 1H NMR, and viscometry measurement. The introduction of hydrophilic backbone resulted in the decrease in both melting point and crystallization property of the PVA- g -PCL copolymers comparing with linear PCL. With higher microwave power, the DP of PCL side chains and DS of PVA backbone were higher, and the polymerization reaction proceeded more rapidly. Both the DP and monomer conversion increased with irradiation time, while the DS increased first and then remained constant. With initiator in low concentration, the DP and DS were higher, while the monomer was converted more slowly. Microwaves dramatically improved the polymerization reaction in comparison of conventional heating method. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 104, 3973,3979, 2007 [source]

Microwave-assisted nucleophilic cleavage of 5,7-dimethyl-2-phenyl-1-oxo-lH -pyrazolo[ 1,2- a]pyrazol-4-ylium-3-olate to ,-phenylmalonamides

JOURNAL OF HETEROCYCLIC CHEMISTRY, Issue 7 2005
Daniel E. Lynch
Three ,-phenylmalonamides have been prepared by the selective nucleophilic cleavage of 5,7-dimethyl-2-phenyl-1-oxo-1H -pyrazolo[1,2- a]pyrazol-4-ylium-3-olate in solventless microwave syntheses. The three weak nucleophiles employed were aniline, p -chloroaniline and m -toluidine. The ,-phenylmalonamides of these three aniline derivatives could not be prepared using the previously reported solvent syntheses via 3-oxopyrazolo[1,2- a]pyrazol-8-ylium-1-olates. All products were characterised using, infrared spectroscopy, 1H nmr and electrospray mass spectrometry. The single crystal X-ray structures of the starting pyrazolo-[1,2- a]pyrazole and ,-phenylmalon- m -toluidide are also reported. [source]

Synthesis and characterization of imidazolinium surfactants derived from tallow fatty acids and diethylenetriamine

EUROPEAN JOURNAL OF LIPID SCIENCE AND TECHNOLOGY, Issue 10 2008
Divya Bajpai
Abstract This paper describes the synthesis of long-chain dialkylamido imidazolines based on tallow fatty acids and diethylenetriamine, followed by their quaternization. Imidazolines were obtained by non-solvent microwave synthesis using calcium oxide as support, which were then quaternized by using dimethyl sulfate as a quaternizing agent and iso -propanol as a solvent, to produce cationic imidazolinium salts. The synthesized cationic imidazoline surfactants were evaluated for yield and cationic content. The instrumental techniques, viz. FT-IR and 1H-NMR, verified the formation of imidazolines and their subsequent quaternization. The surface-active and performance properties of the cationic imidazolines in terms of critical micelle concentration, surface tension, dispersibility, emulsion stability, softening, rewettability and antistatic properties were also reported. [source]