Preparation of an anionic azo pigment-pillared layered double hydroxide and the thermo- and photostability of the resulting intercalated material

被引：74

作者：

Guo, SC ^{[1
]}

Li, DQ ^{[1
]}

Zhang, WF ^{[1
]}

Pu, M ^{[1
]}

Evans, DG ^{[1
]}

Duan, X ^{[1
]}

机构：

[1] Beijing Univ Chem Technol, Minist Educ, Key Lab Sci & Technol Controllable Chem React, Beijing 100029, Peoples R China

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2004年 / 177卷 / 12期

基金：

中国国家自然科学基金;

关键词：

hydrotalcite; azo pigment; intercalation; thermostability; photostability;

D O I：

10.1016/j.jssc.2004.09.028

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A large anionic pigment has been intercalated into a layered double hydroxide (LDH) host by ion-exchange of an Mg/Al LDH-nitrate precursor with a solution of C.I. Pigment Red 48:2 (the calcium salt of 4-((5-chloro-4-methyl-2-sulfophenyl)azo)-3-hydroxy-2-naphthalene-carboxylic acid), in ethane- 1,2-diol. After intercalation of the pigment, the interlayer distance in the LDH increases from 0.86 to 1.72 nm. Infrared spectra and TG-DTA curves reveal the presence of a complex system of supramolecular host-guest interactions. The UV-visible diffuse reflectance spectra of C.I. Pigment Red 48:2 show marked changes after heating at 200 degreesC and above, whereas there are no significant changes in the spectra of the intercalated pigment after heating at temperatures up to 300 degreesC, showing that the thermostability is markedly enhanced by intercalation in the LDH host. The pigment-intercalated LDHs exhibits much higher photostability to UV light than the pristine pigment, in the case of both the pure solids and their composites with polypropylene, as shown by measurement of CIE 1976 L*a*h* color difference (DeltaE) values. (C) 2004 Elsevier Inc. All rights reserved.

引用

页码：4597 / 4604

页数：8

共 30 条

[1]

[Anonymous], COLOUR PERCEPTION MI

[2] The light stability of azo dyes and azo dyeings. III. The effect of artificial perspiration on the light stability of reactive and non-reactive derivatives of two selected azo chromophores in aqueous solution [J].