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The Structure Control and Properties of Azo Dye Intercalation Material

Author: HeShuZuo
Tutor: PuMin
School: Beijing University of Chemical Technology
Course: Physical and chemical
Keywords: Zinc aluminum hydrotalcite Mordant Yellow Acid Orange Laminates peel Quantum chemical calculations Density functional theory (DFT)
CLC: TB33
Type: Master's thesis
Year: 2010
Downloads: 53
Quote: 1
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Abstract


Azo compounds its unique optical properties and characteristics of the N = N double bond in the cis-trans isomerization has very important applications in molecular devices , optical information storage , molecular imprinting and photochromic . The azo compounds exist in poor light and heat stability , likely to cause environmental pollution and other problems , how to be more effective environmentally friendly use of azo compounds azo dye a hot research topic . The hydrotalcite-like compounds having stacked layers of the unique structural characteristics, use of such characteristics to resolve the shortcomings of the azo compound to become today an important part of the azo compounds . In this paper, experimental means preparation methods and structural characteristics of azo dyes intercalated hydrotalcite , using ion exchange prepared Mordant yellow the inserted anion layer of zinc aluminum hydrotalcite , respectively, prepared by co-precipitation method Hopewell ion exchange The Acid Orange anion inserted layer zinc aluminum hydrotalcite . Through the analysis of the experimental results , the different reaction , the reaction temperature , pH value and raw metal ion ratio of product structure , and by X-ray powder diffraction ( XRD ) , thermal analysis ( TG- DTA ) , Fu Fourier transform infrared (FT-IR) , were used to characterize the structure of the intercalated product , the preparation of hydrotalcite precursor and azo dyes intercalated zinc aluminum hydrotalcite most suitable conditions , the experimental results prove that the azo compounds significantly improved thermal stability of the intercalated into the hydrotalcite . In B3PW91/6-31G (d, p) method using quantum chemical density functional theory (DFT) Acid Orange layer zinc aluminum hydrotalcite space geometry optimized calculated results show that the prepared acidic spacing is between the orange the interpolation layer of zinc aluminum hydrotalcite Laminates 2.33nm, with the the experimental XRD test laminates spacing is very close , and thus prove of Acid Orange anion hydrotalcite between platelet arrangement of vertical laminates . More in-depth research, the structure of the azo compound Hydrotalcites formamide as solvent hydrotalcite laminate peel test , peel test results determined according to peel the XRD spectrum , and laminates peeling mechanism discussion.

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