[EN] HAIR COLOR COMPOSITIONS COMPRISING STABLE VIOLET-BLUE TO BLUE IMIDAZOLIUM DYES<br/>[FR] COMPOSITIONS DE COLORATION DES CHEVEUX COMPRENANT DES COLORANTS D'IMIDAZOLIUM STABLES VIOLET-BLEU AU BLEU
申请人:NOXELL CORP
公开号:WO2018053034A1
公开(公告)日:2018-03-22
Disclosed are hair color compositions comprising novel stable violet-blue to blue imidazolium azo compounds that have a simplified chromophore and high relative solubility in aqueous systems, and that are surprisingly stable under the conditions of use and storage. These compositions are useful for dyeing fibers such as hair and other keratinaceous materials. The compositions can optionally include an oxidant. Also disclosed are methods for dying keratin fibers including human hair using the disclosed hair color compositions. The methods optionally include an ability to alter the electronic charge in situ of the hair color compositions
Photochemistry of Far Red Responsive Tetrahydroquinoxaline-Based Squaraine Dyes
作者:Aleksandra Wojcik、Roxana Nicolaescu、Prashant V. Kamat、Yogesh Chandrasekaran、Satish Patil
DOI:10.1021/jp9118887
日期:2010.3.4
tetrahydroquinoxaline-based squaraine dyes (SQ) are investigated using femto- and nanosecondlaserflashphotolysis, pulseradiolysis, and cyclic voltammetry. In acetonitrile and dichloromethane, these squaraines exist as monomers in the zwitterionic form (λmax ≈ 715 nm, εmax ≈ 1.66 × 105 M−1 cm−1 in acetonitrile). Their excited singlet states (1SQ*) exhibit a broad absorption band at 480 nm, with singlet lifetimes
使用飞秒和纳秒激光闪光光解,脉冲辐射分解和循环伏安法研究了两种新合成的基于四氢喹喔啉的方酸染料(SQ)的光化学和氧化还原特性。在乙腈和二氯甲烷中,这些方酸如两性离子形式的单体(λ存在最大≈715纳米,ε最大≈1.66×10 5中号-1厘米-1的乙腈溶液)。它们的激发单重态(1 SQ *)在480 nm处显示出较宽的吸收带,两种染料的单重态寿命分别为44和123 ps。两种方型均表现出差的系统间交叉效率(ΦISC <0.001)。他们激动的三重态(3然而,SQ *)是通过使用三重态激发的9,10-二溴蒽通过三重态-三重态能量传递而有效生成的。方酸菁染料的激发三重态在约200nm处显示出较宽的吸收带。560 nm(ε三重态≈4.2×10 4 M -1 cm -1),并通过三重态三重态an灭和基态猝灭过程进行失活。被研究的方脑(SQ •+)的氧化形式在510和610 nm处表现出最大吸收。
Rhodium(CAAC)‐Catalyzed Arene Hydrogenation of Benzo‐Fused
<i>N</i>
‐Heterocycles to Saturated Building Blocks with an all‐
<i>cis</i>
Configuration
作者:Christian H. Schiwek、Simone Stegbauer、Thomas Pickl、Thorsten Bach
DOI:10.1002/adsc.202200582
日期:2022.10.4
and heterocyclic building blocks can be readily obtained by the hydrogenation of aromatic carbo- and heterocycles. Although a variety of methods have been established to accomplish this transformation for simple arenes, the hydrogenation of aromatic N-heterocycles is less explored. We herein report a diastereoselective arenehydrogenation which was applied to an array of benzo-fused N-heterocycles. A
Method of coloring hair with washfast blue imidazolium direct dye compounds
申请人:Noxell Corporation
公开号:US10034823B2
公开(公告)日:2018-07-31
Described herein is a method of dyeing the hair. The method includes applying to the hair a hair color composition including one or more direct dye compounds and rinsing the hair with water. The one or more direct dye compounds each include a blue-violet or blue chromophore, one or two permanent cations, one to four incipient cations, and one or more hydrophobic moieties. The incipient cations are pendant to the core structure and are neutral. The direct dye compounds enter the hair shaft after the hair color composition is applied to the hair. The hair color composition has a pH of from about 6 to about 11. The pH of the hair after rinsing is from about 3.5 to about 6. The rinsing of the hair causes one or more of the one to four incipient cations to change from neutral to positively charged inside of the hair shaft.