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Upstream product

• 120-21-8 4-Diethylaminobenzaldehyde 
• 530-50-7 1,1-Diphenylhydrazine 

Relevant academic research and scientific papers

Enhancement of photorefractive effect in the isotropic phase of liquid crystalline polymers

The photorefractive effect of the isotropic phase of liquid crystalline polymers was investigated. A large photorefractivity was observed in polymers which exhibit a liquid crystalline phase even though they were in the isotropic phase. The pholorefractivity was compared between the liquid crystalline polymers and amorphous polymers. The photorefractive effect was found to be significantly enhanced in the isotropic phase of the liquid crystalline polymers compared to that of the amorphous polymers with almost the same molecular structure.

PROCESS FOR PRODUCING HYDRAZONE COMPOUND

The present invention provides a process for producing a hydrazone compound represented by the general formula (5): which comprises a step of condensing a hydrazine compound represented by the general formula (3): with a carbonyl compound represented by the general formula (4): without taking the hydrazine compound out of a reactor. According to the invention, the target hydrazone compound can be obtained in high quality and in a high yield without taking the hydrazine compound out of the reactor at all, the hydrazine compound being a reaction intermediate which is structurally unstable and has a fear of influencing safety of workers owing to its toxicity (mutagenicity).

CHARGE TRANSPORT PROPERTIES OF ARYLALDEHYDE HYDRAZONES IN THEIR GLASSY STATES - SINGLE COMPONENT AND DOPED SYSTEMS

For the purpose of elucidating charge transport in disordered organic materials, hole transport in the glassy state of 4-diphenylaminobenzaldehyde diphenylhydrazone (DPH), 4-diphenylaminobenzaldehyde methylphenylhydrazone (DPMH), and DPH doped with a small amount of 4-diethylaminobenzaldehyde diphenylhydrazone (DEH) has been studied.The hole drift mobility in the DPMH glass was approximately one-fifth of that in the DPH glass; this was attributed to a higher activation energy in terms of the Arrhenius formalism or to an increased width of the Gaussian density of states based on the site energy disorder model for the DPMH glass.The introduction of less than 1 molpercent DEH into DPH resulted in a significant increase in activation energy or in the Gaussian width of the site energy distribution, which increased with increasing concentration of the dopant. - Keywords: 4-diphenylaminobenzaldehyde diphenylhydrazone, 4-diphenylaminobenzaldehyde methylphenylhydrazone, 4-diethylaminobenzaldehyde diphenylhydrazone, mobility, charge transport, Poole Frenkel, photoconductivity, trapping

Process for synthesis of N,N-disubstituted hydrazone

A process for synthesizing an N,N-disubstituted hydrazone comprises carrying out nitrozation by adding an aqueous solution of sodium nitrite to a solution having one part by weight of an N,N-disubstituted amine dissolved in 3 to 30 parts by weight of an organic acid, then reducing the nitrozated product to an N,N-disubstituted hydrazine by adding a reducing agent to the mixture containing the nitrozated product, and thereafter adding to the mixture containing the N,N-disubstituted hydrazine a carbonyl compound of the formula: STR1 wherein A represents an aromatic hydrocarbon group or an aromatic heterocyclic group which may have a substituent, B represents a hydrogen atom, an alkyl group, an aryl group or an aromatic heterocyclic group, which may have a substituent, thereby performing condensation of the N,N-disubstituted hydrazine with the carbonyl compound.