双偶氮染料光致增色性质及光电导性研究

自Rau1]首次报道偶氮染料具有光电导性质以来，偶氮染料一直被作为有应用价值的光电导材料而受到人们的重视2]．特别是近年来发现，偶氮染料具有优良的光存储性能，引起了人们的极大兴趣3]．但由于一般的偶氮染料吸收波长较短，难与目前普遍使用的激光器波长响应相匹配，从而限制了其使用．因此，如何从分子设计的角度使偶氮染料的吸收向长波方向移动，是目前国际上研究的热点4，5]．Law等5]合成了一些二氨基芴酮与萘酚偶合的双偶氮染料，研究了扩大萘酚萘环共轭体系时其吸收的变化情况．本文合成了几个新的双偶氮染料，研究了茶酚酸…

Synthesis, Optical Absorption and Xerographic Properties of Bisazo Pigments from 2,7-Diaminofluorenone

Several bisazo pigments were synthesized by coupling 2, 7-diaminoflurenone with avariety of 2-hydroxy-3-naphthanilides. The results of elementary analysis and iR indicatedthat the synthesis and purification were successful. The UV spectra of the pigments in DMFrevealed that the visible absorption bands of Azo-3 and Azo-4 were red-shifted obviouslywhich can be attributed to the significant conjugate effect. When the pigments in DMF wereirradiated using an infrared lamp, the properties of photochrism were observed. When theirradiation was carried out by using a high pressure mercury lamp, the absorption of thesolutions was decreased. The xerographic performence of Azo-3 in combination with two chargetransport molecules 4-(diethylamino ) benzaldehyde diphenyl-hydrozone (DEH ) and4(dimethylamino) benzaldehyde phenylnaphthylhydrozone (DENH )] was investigated. Wefound Azo-3 has a better photosensitivity by using DENH as charge transport molecule andpoly(methyl methacrylate) (PMMA) as charge blocking layer.