A structural study of seven salt forms of sulfonated azo dyes containing nitrile functional groups

被引：14

作者：

Astbury, Catherine ^{[1
]}

Conway, Linda K. ^{[1
]}

Gillespie, Cheska ^{[1
]}

Hodge, Kirsty ^{[1
]}

Innes, Elaine ^{[1
]}

Kennedy, Alan R. ^{[1
]}

机构：

[1] Univ Strathclyde, Dept Pure & Appl Chem, Glasgow G1 1XL, Lanark, Scotland

来源：

DYES AND PIGMENTS | 2013年 / 97卷 / 01期

关键词：

Single crystal diffraction; Sulfonated azo dye; Salt forms; Nitrile coordination; Supramolecular structure; s-block metals; X-RAY-POWDER; CRYSTAL-STRUCTURES; MONOAZO DYES; SUPRAMOLECULAR MOTIFS; RED; PIGMENT; DIFFRACTION; COMPLEXES; CHEMISTRY; MAGNESIUM;

D O I：

10.1016/j.dyepig.2012.11.025

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The crystal structures of seven salt forms of nitrile functionalised monosulfonated azo dyes, as isolated from aqueous solution, are described. The presence of nitrile gives unique structures for the Na salts examined. The normally observed Na-O3S bonding is absent and has been replaced by Na-NC interactions, giving supramolecular structures not previously seen for similar azo colourants. A highly unusual side-on nitrile coordination mode is observed and this bonding is observed both crystallographically and by IR spectroscopy. However, the alkaline earth element salts are all of structural types seen before for other non-nitrile bearing sulfonated azo dyes. Thus the Mg salts are solvent-separated ion-pair species based on the [Mg(OH2)(6)] ion and the Ca and Sr species are simple complexes of the type [M(L)(2)(OH2)(6)], where L is the azo dye anion bonded to the metal centre through a single O atom of the sulfonate group. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：100 / 104

页数：5

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