Co-intercalation of Acid Red 337 and a UV Absorbent into Layered Double Hydroxides: Enhancement of Photostability

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• 作者：Dianqing Li ; Leilei Qian ; Yongjun Feng ; Junting Feng ; Pinggui Tang ; Lan Yang
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2014
• 出版时间：December 10, 2014
• 年：2014
• 卷：6
• 期：23
• 页码：20603-20611
• 全文大小：576K
• ISSN：1944-8252

文摘

Organic鈥搃norganic hybrid pigments with enhanced thermo- and photostability have been prepared by co-intercalating C.I. Acid Red 337 (AR337) and a UV absorbent (BP-4) into the interlayer of ZnAl layered double hydroxides through a coprecipitation method. The obtained compounds were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, thermogravimetric鈥揹ifferential thermogravimetric鈥揹ifferential thermal analysis, UV鈥搗isible spectroscopy, and the International Commission on Illumination (CIE) 1976 L*a*b* color scales. The results show the successful co-intercalation of AR337 and BP-4 into the interlayer region of layered double hydroxides (LDHs) and reveal the presence of host鈥揼uest interactions between LDH host layers and guest anions of AR337 and BP-4 and guest鈥揼uest interactions between AR337 and BP-4. The intercalation can improve the thermostability of AR337 due to the protection of LDH layers. Moreover, the co-intercalation of AR337 and BP-4 not only markedly enhances the photostability of AR337 but also significantly influences the color of the hybrid pigment.

Keywords:

layered double hydroxides; hybrid pigment; intercalation; thermostability; photostability