18708-42-4

Upstream product

• 591-51-5 phenyllithium 
• 106-38-7 para-bromotoluene 
• 80-10-4 diphenylsilyl dichloride 
• 624-31-7 4-tolyl iodide 
• 775-12-2 diphenylsilane 
• 10026-04-7 tetrachlorosilane 
• 2417-95-0 p-tolyllithium 

Downstream Products

• 18708-43-5 4,4'-(diphenylsilanediyl)dibenzoic acid 
• 1345456-85-0 diphenylbis(4-(5-phenyl-1,3,4-oxadiazol-2-yl)phenyl)silane 
• 186045-12-5 bis(p-(bromomethyl)phenyl)diphenylsilane 
• 18708-44-6 bis(p-chlorocarbonyl-phenylene)diphenylsilane 

Relevant academic research and scientific papers

Blue fluorescent polyamides containing naphthalene and oxadiazole rings

New polyamides containing 1,3,4-oxadiazole and naphthalene rings were prepared by low-temperature solution polycondensation reaction of a new diamine containing preformed oxadiazole ring with various aromatic diacid chlorides. Elemental analysis, mass, infrared, and nuclear magnetic resonance spectroscopy were used to confirm the structure of the monomers and corresponding polymers. The thermal stability and glass transition temperatures of these poly(oxadiazole-amide)s were measured and compared with those of related polymers. Their good solubility allows them to be processed in very thin films with smooth surfaces, without pinholes or cracks, when studied by atomic force microscopy. Upon irradiation with UV light the polymers showed photoluminescence maxima in the blue spectral range, both in solution and in solid state. Cyclic voltammetry (CV) was performed in order to obtain information about the electrochemical stability and reversibility of the redox processes of these polyamides. The highest occupied molecular orbital and the lowest unoccupied molecular orbital energy levels, and electrochemical and optical band gap values were calculated by using the results of CV and UV/vis, respectively, showing very good electron and hole injection and transport characteristics. These properties make the present polymers suitable for application in electroluminescent devices.

Di- and tetracarboxylic aromatic acids with silane spacers and their copper complexes: Synthesis, structural characterization and properties evaluation

Two polycarboxylic acids, bis(p-carboxyphenyl)diphenylsilane and bis(3,4-dicarboxyphenyl)dimethylsilane, were prepared according to published procedures and characterized, besides elemental and spectral analysis, for the first time by X-ray single crystal

Di- and tetracarboxylic aromatic acids with silane spacers and their copper complexes: Synthesis, structural characterization and properties evaluation

Two polycarboxylic acids, bis(p-carboxyphenyl)diphenylsilane and bis(3,4-dicarboxyphenyl)dimethylsilane, were prepared according to published procedures and characterized, besides elemental and spectral analysis, for the first time by X-ray single crystal

Radical-forming polyamides for self-decontamination coatings

Design and synthesis of thermally stable polyamides with improved solubility based on an asymmetrical aromatic diamine containing phenoxy substituted benzophenone segment was the main objective of this work. These polymers were easily soluble at room temperature in polar aprotic solvents and even in less polar solvents, such as tetrahydrofuran. The polymers showed excellent thermal stability, up to 385°C, and exhibited glass transition in the range of 225-256°C. All the polymers emitted an intense blue light upon irradiation with UV light, due to the emission from the benzophenone chromophore. The free-standing films having the thickness in the range of tens of micrometers obtained from these polymers were flexible, tough, and maintained their integrity after repeated bendings. To investigate the radical-forming ability of the polyamides for decomposing surrounding harmful materials, degradation of methylene blue by the polymer films was studied.

Difunctional silarylene-containing aliphatic compounds. Synthesis and characterization of BIS(p-(carboxymethyl) phenyl)(R) phenylsilane and BIS(p-(2-aminoethyl) phenyl)(R) phenylsilane (R = Me, Ph)

This work describes the synthesis of aliphatic diacids and diamines containing a silarylene moiety in the structure. These compounds can be employed as monomers for the synthesis of poly(amides) and poly(esters) or other condensation polymers. Thus, bis(p-methylphenylen)(R) phenylsilanes were obtained from p-bromotoluene and dicloro(R) phenylsilane (R = Me, Ph). Also, the dibenzyl nitrile compounds bis(p-(cyanomethyl) phenylen)(R) phenylsilanes were synthesized from the respective bis(p-(bromomethyl) phenylen) (R) phenylsilanes derivatives. The hydrolysis of the dibenzyl nitrile derivatives gives the respective diacids bis(p-(carboxymethyl) phenylen)(R) phenylsilanes with low yield. A direct Grignard reaction type was also studied using as precursors the dibenzyl bromide compounds. In a second stage, the synthesis of the phenethylamine bis(p-(2-aminoethyl) phenylen)(R) phenylsilane was studied by the reduction of the dibenzyl nitrile compounds. All compounds were characterized by IR-TF, 1H, 13C and 29Si NMR.

Integrated palladium-catalyzed arylation of heavier groupa 14 hydrides

A convenient procedure has been developed for the preparation of Groupa 14 compounds by integrated palladium-catalyzed cross-coupling of aromatic iodides with the corresponding Groupa 14 hydrides in the presence of a base. The reaction conditions can be applied to the cross-coupling of tertiary, secondary, and primary Groupa 14 compounds. In most cases, the desired arylated products were obtained in synthetically useful yields. Even in the case of aryl iodides containing OH, NH2, CN, or CO2R groups, the reactions proceeded with good to high yields with tolerance of these reactive functional groups. A possible application of this method is the unique synthesis of a fungicidal diarylmethyl(1H-1,2,4-triazol-1-ylmethyl)silane derivative. A convenient procedure has been developed for the preparation of Groupa 14 compounds by integrated palladium-catalyzed cross-coupling of aromatic iodides with the corresponding Groupa 14 hydrides in the presence of a base (see picture). Application of this method in the synthesis of a fungicidal diarylmethyl(1H-1,2,4-triazol-1-yl-methyl)silane derivative is demonstrated. Copyright

Efficient preparation of monohydrosilanes using palladium-catalyzed Si-C bond formation

(Chemical Equation Presented) The arylation of dihydrosilanes with aryl iodides or heteroaryl iodides in the presence of a palladium catalyst provides the corresponding monohydrosilanes in good to high yield. Moderate to good yields are obtained even in the presence of a variety of reactive functional groups, such as -NH2, -OH, or -CN, without their protection.

Di-p-tolydialkylsilane derivative and photoluminescene polymer formed therefrom and methods for preparing these compounds

A di-p-tolyldialkylsilane derivative, a photoluminescence polymer formed from the derivative, and methods for preparing the derivative and polymer are provided. The di-p-tolyldialkylsilane derivative is represented by the following formula (1): STR1 where