Synthesis and properties of triphenylamine-based hydrazones with reactive vinyl groups

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• 作者：V. Mimaite^a ; J.V. Grazulevicius^a ; ^{juozas.grazulevicius@ktu.lt} ; J. Ostrauskaite^a ; V. Jankauskas^b
• 关键词：Hydrazone ; Triphenylamine ; Vinyl group ; Polymerization ; Charge mobility ; Methoxy group
• 刊名：Dyes and Pigments
• 出版年：2012
• 期刊代码：31_01437208
• 类别：ms
• 出版时间：October, 2012
• 卷：95
• 期：1
• 页码：47-52
• 文件大小：422 K

摘要

Two triphenylamine-based hydrazones with reactive vinyl groups were synthesized and characterized. The optical, thermal, electrochemical and photoelectrical properties of the obtained compounds were studied. All the synthesized hydrazone monomers form glasses with the glass transition temperatures ranging from 52聽掳C to 82聽掳C. The electron photoemission spectra of the synthesized hydrazones were recorded and ionization potentials of 5.22-5.29聽eV were established. Room temperature hole-drift mobilities in the amorphous film of hydrazone monomer having three vinyl groups established by xerographic time-of-flight technique was found to be 3.5聽脳聽10^鈭?聽cm²/V路s at an electric field of 6.4聽脳聽10⁵聽cm²/V路s. Self-polymerization of the hydrazones bearing vinyl groups was demonstrated by differential scanning calorimetry. Self-polymerization of monomers containing one and three vinyl groups started at 151聽掳C and 136聽掳C, while maximum polymerization rates were observed at 209聽掳C and 167聽掳C respectively.