scholarly journals Synthesis and Characterization of New Thioxanthone Derivatives

2013 ◽  
Vol 10 (3) ◽  
pp. 724-735
Author(s):  
Baghdad Science Journal
Keyword(s):  
Sulfuric Acid ◽  
Benzoic Acid ◽  
Sodium Azide ◽  
Aromatic Amines ◽  
Chlorosulfonic Acid ◽  
Starting Material ◽  
Phosphorus Compounds ◽  
Synthesis And Characterization

This work comprises the synthesis of new thioxanthone derivatives containing C-substituted thioxanthone. To obtain these derivatives, the o-mercapto benzoic acid was chosen as the starting material, which was reacted with dry benzene in sulfuric acid (98 %) to produce the thioxanthone (1). The 2,7-(disulfonyl phosphine imine) thioxanthone (4-8) were prepared from reaction of compound (1) with chlorosulfonic acid gave 2,7-(disulfonyl chloride) thioxanthone (2). Treatment of (2) with sodium azide to produce 2,7-(disulfonyl azide) thioxanthone (3). Condensation of (3) with phosphorus compounds afforded compounds (4-8). The 2,7-(disulfonamide) thioxanthone (9-21) was obtained when compound (2) condensed with different aromatic amines, it gave the expected amides (9-21).

Synthesis and characterization of novel functionalized perarylated polysiloxane for proton exchange membrane fuel cells

MRS Advances ◽  
2019 ◽  
Vol 4 (64) ◽  
pp. 3579-3585
Author(s):  
Guillermo M. González Guerra ◽  
Alejandro Alatorre-Ordaz ◽  
Gerardo González Garcia ◽  
Jesus S. Jaime-Ferrer
Keyword(s):  
Cyclic Voltammetry ◽  
Fuel Cells ◽  
Proton Exchange Membrane ◽  
Area Under The Curve ◽  
Chlorosulfonic Acid ◽  
Proton Exchange ◽  
Synthesis And Characterization ◽  
A Value ◽  
Exchange Membrane

ABSTRACTThis work presents the synthesis and characterization of a pearylated polysiloxane material (PAP) from a polycondensation reaction, followed by functionalization with HClSO3 by an electrophilic substitution reaction. According to the characterization techniques applied, a sulfonated pearylated polysiloxane was also obtained, (SPAP). The purpose of this sulfonated material is to obtain an ionomer able to be applied in hydrogen fuel cells of the proton exchange membrane kind (PEMFC). The reaction to produce the polysiloxane precursor was carried out with the commercial reagents: PhSiCl3, Ph2SiCl2 and Ph3SiCl in anhydrous THF at 75 °C and the SPAP material was obtained by sulfonation of the precursor with chlorosulfonic acid. PAP and SPAP were characterized by 1H, NMR for liquids, 29Si NMR for solids, IR-ATR, SEM, and cyclic voltammetry. The NMR 29Si spectra show that PAP and PAPS contain crosslinking regions due to PhSiCl3, growing chain zones due to Ph2SiCl2 and polymer termination zones due to Ph3SiCl, obtaining a mixture of siloxanes. The analysis by cyclic voltammetry indicates that by integrating the area under the curve of the adsorption peaks of H2, a value of 0.062 mC/cm2 is obtained, a value close to the commercial ionomer of Nafion®.

Synthesis and characterization of nano-scale terbium-benzoic acid luminescent complex

2007 ◽  
Author(s):  
Zhenfeng Cui ◽  
Huijuan Ren ◽  
Fenghua Chen ◽  
Guixia Liu ◽  
Guangyan Hong
Keyword(s):  
Benzoic Acid ◽  
Synthesis And Characterization ◽  
Nano Scale

scholarly journals Synthesis and Characterization of some New 1,3,4-Oxadiazole derivatives based on 4-amino benzoic acid

2016 ◽  
Vol 13 (4) ◽  
pp. 762-769
Author(s):  
Baghdad Science Journal
Keyword(s):  
Schiff Base ◽  
Benzoic Acid ◽  
Spectral Data ◽  
1H Nmr ◽  
Synthesis And Characterization ◽  
Oxadiazole Derivatives ◽  
Ft Ir ◽  
Amino Benzoic Acid

Various of 2,5- disubstituted 1,3,4-oxadiazole (Schiff base, ?- lactam and azo) were synthesized from 2,5-di (4,4?-amino-1,3,4-oxadiazole which usequently synth-esized from mixture of 4- amino benzoic acid and hydrazine arch of polyphosphorus acid. The synthesized compounds were cherecterized by using some spectral data (UV, FT-IR , and 1H-NMR)

Synthesis and Characterization of Ga2O3 Nanowires

2007 ◽  
Vol 121-123 ◽  
pp. 299-302
Author(s):  
Ke Feng Cai ◽  
C. Yan ◽  
X.R. He ◽  
A.X. Zhang
Keyword(s):  
Formation Mechanism ◽  
Starting Material ◽  
Synthesis And Characterization ◽  
Al2o3 Powder ◽  
Preparation Conditions

Ga2O3 nanowires were prepared by vapor-solid process in atmosphere, using commercial Ga ingot and Ga2O3 powder or Al2O3 powder as the starting materials. The influence of preparation conditions such as temperature and starting material on the products was studied. The composition and morphology of the products were characterized by XRD, SEM/EDX, TEM, and HRTEM. The formation mechanism of the products was proposed.

The Schmidt reaction of anthraquinones

1982 ◽  
Vol 60 (5) ◽  
pp. 624-628 ◽  
Author(s):  
Cecily A. Flemming ◽  
Sham S. Gandhi ◽  
Martin S. Gibson ◽  
Edward H. Ruediger
Keyword(s):  
Sulfuric Acid ◽  
Amino Acid ◽  
Methyl Ester ◽  
Benzoic Acid ◽  
Sodium Azide ◽  
Schmidt Reaction ◽  
Direct Treatment ◽  
Hydrolysis Of

Schmidt reaction (sodium azide/sulfuric acid) of 1,5- and of 1,8-dichloroanthraquinones gives, in each case, both of the theoretically possible lactams (2,3,5,6-dibenzoazepin-4,7-diones). Two of the four theoretically possible lactams have been identified from Schmidt reaction of 1- and 2-chloroanthraquinones respectively. Methods used include: (a) preferential hydrolysis of one lactam and identification of the isomeric aminoanthraquinone formed on cyclodehydration of the resulting amino acid; (b) identification of the isomeric aminoanthraquinone(s) formed on direct treatment of a lactam (or mixture of lactams) by sulfuric acid; (c) cleavage by potassium tert-butoxide of the amino acid formed by preferential hydrolysis of one lactam and identification of the resulting benzoic acid as its methyl ester.

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