4-dimethylaminoazobenzene, structur

Synonyms 4-Dimethylaminoazobenzene (preferred name) DAB DMAB 4-Dimethylaminoazobenzol 4-Dimetbylaminopbenylazobenzene Dimethyl yellow Brilliant fast oil yellow Fast yellow Fat yellow Chemical Formula C14H15N3 Chemical Structure ... 

Sample Preparations. Figure 2 shows the chemical structures of NBD (norbomadiene) derivatives and other dyes used in this study. NBDA (norbomadiene dicarboxylic acid) and P(MMA-co-GMA-PNCA)(20) were supplied by Prof. Nishikubo of Kanagawa University. P(NBDA//wXDA) was synthesized as previously reported(2i). Dyes of DAAB (p-dimethylaminoazobenzene), FG540 ((E)-a-2,5-dimethyl-3-furylethylidene(isopropyl)succinic anhydride) and MAB (p-methoxyazobenzene) were of commercial purity. PMMA... 

Another electronic parameter used in the correlation o structure with biological activity is the empirical measure o electron density, pKg,. Brown and Kipp have resolved the overall basicity or series o 4 -alkyl-4-dimethylaminoazoben-zenes and prime-dimethyl-4-dimethylaminoazobenzenes (Fig. 1) into pKj jj and pKa o which represent the pK o the two basic centers, the amino and azo nitrogens, respectively. The electron densities so determined were then compared with... 

A first example is that of methyl orange (helianthin), whose bicolor indicator is the sodium salt of the 4-dimethylaminoazobenzen-4 -sulfonic acid whose color-change interval is 4.4 < pH < 6.2. The structures that participate in the equilibrium... 

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