合适的隔离基团的概念被应用到非线性光学聚磷腈的合成中,该非线性光学聚磷腈包含使用后功能策略连接到聚磷腈侧链的不同隔离基团。聚合物中NLO生色团部分的负载密度相对较高(每单位0.60),并且所有聚合物均显示出良好的可加工性和相对较好的NLO效果,如聚磷腈记录的SHG系数(d 33)为67.3 pm V -1所例证。包含最大的隔离组。
Novel benzoxazine compounds of the structure ##STR1## wherein X and Y are independently selected from the group hydrogen, alkyl, alkoxyalkyl, aminoalkyl, hydroxyalkyl and hydroxyaminoalkyl, each alkyl moiety having 1 to 6 carbons, and m=1, 2 or 3, have been found suitable as hair dyes.
Novel, side-on, PVK-based nonlinear optical polymers: Synthesis and NLO properties
作者:Zhong'an Li、Li Wang、Bi Xiong、Cheng Ye、Jingui Qin、Zhen Li
DOI:10.1016/j.dyepig.2009.07.006
日期:2010.1
A novel, poly(vinylcarbazole)-based nonlinear optical polymer (side-on type), in which the chromophore was attached to the polymer backbone at the centre of the D-π-A bridge, was synthesized conveniently via the post-Knoevenagel condensation reaction. The structure of chromophore was further modified by the introduction of an isolation spacer (carbazole group) to improve poling efficiency. The ensuing
Ink compositions for the ink jet printing process containing one or more azo dyes of the groups of yellow, magenta and cyan dyes of formulae (1) to (3) are disclosed, which are of use in the production of non-fading coloured and black-and-white images.
Synthesis and characterization of selected 4,4′-diaminoalkoxyazobenzenes
作者:Euigyung Jeong、Harold S. Freeman、Larry D. Claxton
DOI:10.1016/j.dyepig.2010.03.002
日期:2010.10
The role of the -N(CH2CH2OH)(2) group in producing a mutagenic response from 4-((3-(2-hydroxyethoxy) 4-amino)phenylazo)-N,N-bis(2-hydroxyethyl)aniline has been investigated. To accomplish this goal, a group of substituted 4,4'-diaminoazobenzene dyes was synthesized, and their structures were confirmed using 1H NMR, TOF-LC-ESI mass spectrometry, and combustion analysis. Mutagenicity was determined using the standard Ames test in Salmonella strains TA98, TA100, and TA1538 with and without S9 enzyme activation. The results of this study provide evidence that the mutagenicity of the parent dye arises from the metabolic cleavage of N-hydroxyethyl groups to give the corresponding -NHCH2CH2OH and -NH2 substituted monoazo dyes as direct-acting mutagens. All 5 of the dyes studied were mutagenic at various levels with and without S9 enzyme activation in TA1538. In addition, the results show that removing one N-hydroxyethyl group and capping both -OH groups in the parent dye did not affect mutagenicity, whereas removing both N-hydroxyethyl groups produced a strong direct-acting mutagen in all three bacterial strains. Increasing the length of the N-alkyl chain from two to three carbon atoms eliminated mutagenicity in TA98 without S9 activation. (C) 2010 Elsevier Ltd. All rights reserved.
MARKOVICH I. S.; FILYAGINA N. A.; RYABOKOBYLKO YU. S.; DZIOMKO V. M., ZH. BCEC. XIM. O-BA IM. D. I. MENDELEEVA, 1979, 24, HO 6, 644-646
作者:MARKOVICH I. S.、 FILYAGINA N. A.、 RYABOKOBYLKO YU. S.、 DZIOMKO V. M.