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Abstract
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Azo dyes have attracted significant attention due to their multi-purpose applications in various areas [1]. Recently some researches have reported that the organic dye anions/ LDH systems exhibit blue-shift photoemission and enhanced fluorescence efficiency compared with those of the pristine azo dye sample, and the Azo dye/ Layered double hydroxides (LDHs) thin films exhibit precise polarized luminescence with the fluorescence anisotropy characterization [2-4]. The results indicated that the photoactive dyes intercalated into the LDH structures can possibly be applied in the field of optoelectronic and photonic materials, and the results obtained from the hybrid-LDH materials could be used to enhance understanding the structure of the other hybrid-LDHs intercalated with more complex anion structures [5]. In the present research, we report Scarlet GN anions assembled into a Zn2Al -LDH inorganic host using the co-precipitation method, in which solutions of Zn(II) and Al(III) nitrate salts react with an alkaline solution of Scarlet GN. Powder X-ray diffraction, FTIR spectroscopy, elemental analyses, and thermal gravimetric analysis (TGA) were used to characterize the successful incorporation of the Scarlet GN anions into the interlayer space of LDH. Optical results show that when Scarlet GN anions intercalate in Zn–Al-LDH, they cause a blue shift and subsequently decrease the band gap energy in comparison with LDHs.
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