A method for increasing the solubility of industrial azo pigments for 13C and 1H NMR spectra and the assignments of their 13C and 1H NMR peaks

被引：1

作者：

Zhu, Meiling ^{[1
]}

Feng, Guangyuan ^{[1
]}

Lv, Dongjun ^{[2
]}

Qin, Nan ^{[3
]}

Li, Chunbao ^{[1
]}

机构：

[1] Tianjin Univ, Sch Sci, Dept Chem, 135 Yaguan Rd, Tianjin 300354, Peoples R China

[2] Dezhou Univ, Coll Chem & Chem Engn, Dezhou, Peoples R China

[3] Tianjin Med Univ, Sch Pharm, Tianjin 300070, Peoples R China

来源：

MAGNETIC RESONANCE IN CHEMISTRY | 2021年 / 59卷 / 08期

关键词：

azo pigment; DBU; dimensional NMR; peak assignment; solubility; solution C-13 NMR; COPPER; NMR;

D O I：

10.1002/mrc.5138

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A method for increasing the solubilities of industrial azo pigments in DMSO by adding DBU (1,8-diaza-7-bicyclo[5.4.0]undecene) has been developed. This facilitated the acquisition of solution C-13 NMR spectra of the pigments. This method was applied to four types of azo pigments: naphthol AS (3-hydroxy-2-naphthoic acid anilide) pigments, naphthol pigments, pyrazolone pigments and acetoacetanilide pigments. This represents the first solution C-13 NMR spectra for naphthol AS pigments. Altogether 18 industrial azo pigments were analysed using 1D and 2D NMR techniques. The proton and corresponding carbon NMR resonances of these pigments have all been assigned.

引用

页码：804 / 814

页数：11

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