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Search: authors:"Reda M. El-Shishtawy"

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Experimental and theoretical study of donor-π-acceptor compounds based on malononitrile

A set of different donor-π-acceptor compounds having dicyanovinyl as the acceptor and aryl moieties as donors were synthesized by Knoevenagel condensation. The UV–visible absorption and fluorescence spectra were investigated in different solvents. The optical band gab energy (Eg) was linearly correlated with the Hammett resonance effect of the donor to reveal that the higher the...

Synthesis and structural properties of 2-((10-alkyl-10H-phenothiazin-3-yl)methylene)malononitrile derivatives; a combined experimental and theoretical insight

Background Donor acceptor moieties connected through π-conjugated bridges i.e. D-π-A, in order to facilitate the electron/charge transfer phenomenon, have wide range of applications. Many classes of organic compounds, such as cyanine, coumarin carbazole, indoline, perylene, phenothiazine, triphenylamine, tetrahydroquinoline and pyrrole can act as charge transfer materials...

Pyran-Squaraine as Photosensitizers for Dye-Sensitized Solar Cells: DFT/TDDFT Study of the Electronic Structures and Absorption Properties

June 2014; Published 1 September 2014 Academic Editor: Juliusz Sworakowski Copyright © 2014 Reda M. El-Shishtawy et al. This is an open access article distributed under the Creative Commons

Nucleophilic Addition of Reactive Dyes on Amidoximated Acrylic Fabrics

, Egypt Received 10 June 2014; Revised 20 July 2014; Accepted 22 July 2014; Published 28 August 2014 Academic Editor: Run-Cang Sun Copyright © 2014 Reda M. El-Shishtawy et al. This is an open access

Functional Dyes, and Some Hi-Tech Applications

Research Division, National Research Centre, El-Behouth Street, Dokki, Cairo 12622, Egypt Received 14 May 2009; Accepted 2 September 2009 Academic Editor: Ugo Mazzucato Copyright © 2009 Reda M. El ... -Shishtawy. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work

Solid fermentation of wheat bran for hydrolytic enzymes production and saccharification content by a local isolate Bacillus megatherium

Back ground For enzyme production, the costs of solid state fermentation (SSF) techniques were lower and the production higher than submerged cultures. A large number of fungal species was known to grow well on moist substrates, whereas many bacteria were unable to grow under this condition. Therefore, the aim of this study was to isolate a highly efficient strain of Bacillus sp...