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基于铝镁水羟碳酸盐和偶氮生色团的有机-无机杂化复合材料的特性及结构-性能关系。

Characterization and Structure⁻Property Relationships of Organic⁻Inorganic Hybrid Composites Based on Aluminum⁻Magnesium Hydroxycarbonate and Azo Chromophore.

机构信息

Institute of Polymer and Dye Technology, Faculty of Chemistry, Lodz University of Technology, Stefanowskiego 12/16, 90-924 Lodz, Poland.

Institute of General and Ecological Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland.

出版信息

Molecules. 2019 Mar 1;24(5):880. doi: 10.3390/molecules24050880.

DOI:10.3390/molecules24050880
PMID:30832297
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6429098/
Abstract

In this study, novel organic⁻inorganic composites were prepared by the complexation of dicarboxylic azo dye (AD) with aluminum⁻magnesium hydroxycarbonate (AlMg⁻LH). This procedure provides an effective method for the stabilization of dicarboxylic organic chromophores on an AlMg-LH host. The structures of the hybrid composites were examined by X-ray diffraction (XRD), secondary ion mass spectrometry (TOF-SIMS), 27-Al solid-state nuclear magnetic resonance (NMR) spectroscopy, thermogravimetric analysis (TGA) and scanning transmission electron microscopy (STEM). The TOF-SIMS method was applied to investigate the metal⁻dye interactions and to monitor the thermal stability of the organic⁻inorganic complexes. Secondary ion mass spectrometry confirmed the presence of a characteristic peak for CHO₅N₂Mg₂, indicating that both carboxylic groups interacted with AlMg-LH by forming complexes with two Mg ions. Modification with hybrid pigments affected the crystal structure of the AlMg-LH mineral, as shown by the appearance of new peaks on the X-ray diffraction patterns. Adsorption of the dicarboxylic chromophore not only led to significantly enhanced solvent resistance but also improved the thermal and photostability of the hybrid pigments. We propose a possible arrangement of the azo dye in the inorganic matrix, as well as the presumed mechanism of stabilization.

摘要

在这项研究中，通过偶氮染料（AD）与铝镁水合羟碳酸盐（AlMg⁻LH）的络合作用制备了新型有机-无机复合材料。该方法为二羧酸有机生色团在 AlMg-LH 主链上的稳定化提供了一种有效方法。通过 X 射线衍射（XRD）、二次离子质谱（TOF-SIMS）、27Al 固态核磁共振（NMR）光谱、热重分析（TGA）和扫描透射电子显微镜（STEM）对混合复合材料的结构进行了检查。TOF-SIMS 方法用于研究金属-染料相互作用并监测有机-无机配合物的热稳定性。二次离子质谱证实了 CHO₅N₂Mg₂的特征峰的存在，表明两个羧酸基团通过与 AlMg-LH 形成两个 Mg 离子的配合物相互作用。杂化颜料的修饰影响了 AlMg-LH 矿物的晶体结构，这可以从 X 射线衍射图谱上出现新的峰看出。二羧酸生色团的吸附不仅显著提高了溶剂的抗性，而且提高了杂化颜料的热稳定性和光稳定性。我们提出了偶氮染料在无机基质中的可能排列方式，以及假定的稳定机制。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ade5/6429098/94624666a71b/molecules-24-00880-g015.jpg
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