Preparation of Scarlet GN –Zn–Al layered double hydroxide nanohybrid and study its optical properties

Azo dyes have attracted significant attention due to their multi-purpose applications invarious areas [1]. Recently some researches have reported that the organic dye anions/ LDHsystems exhibit blue-shift photoemission and enhanced fluorescence efficiency compared withthose of the pristine azo dye sample, and the Azo dye/ Layered double hydroxides (LDHs) thinfilms exhibit precise polarized luminescence with the fluorescence anisotropy characterization [2-4]. The results indicated that the photoactive dyes intercalated into the LDH structures canpossibly be applied in the field of optoelectronic and photonic materials, and the results obtainedfrom the hybrid-LDH materials could be used to enhance understanding the structure of the otherhybrid-LDHs intercalated with more complex anion structures [5].In the present research, we report Scarlet GN anions assembled into a Zn2Al -LDH inorganichost using the co-precipitation method, in which solutions of Zn(II) and Al(III) nitrate salts reactwith an alkaline solution of Scarlet GN. Powder X-ray diffraction, FTIR spectroscopy, elementalanalyses, and thermal gravimetric analysis (TGA) were used to characterize the successfulincorporation of the Scarlet GN anions into the interlayer space of LDH. Optical results showthat when Scarlet GN anions intercalate in Zn–Al-LDH, they cause a blue shift and subsequentlydecrease the band gap energy in comparison with LDHs.

Keywords:

Azo Dyes , Layered Double Hydroxides , Photonic Materials , Intercalate