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Abstract
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The purpose of the present study was to synthesize types of organic–inorganic hybrid photofunctional materials and also
to control their photoluminescence properties. Furthermore, we reported synthesis of a nanohybrid with two-color blue/
violet and two-color red/yellow photoluminescence (PL) using the photofunctional anion (Allura Red AC) and Mg–Allayered
double hydroxide (LDH) nanosheets as the basic building blocks. The detailed chemical structure of the obtained
composites was characterized by X-ray diffraction and infrared spectra (FT-IR). The results confirmed that Allura Red
AC was successfully intercalated into the interlayer space of LDHs and the Allura Red AC–Mg3Al-LDH and Allura Red
AC–Zn3Al-LDH hybrids were obtained with interesting photoemission properties. The PL analysis and diffuse reflectance
spectroscopy (DRS) were used to study the photophysical properties. Allura Red AC–LDH systems exhibited a blue shift
photo emission compared with the pristine Allura Red AC sample. Furthermore, Allura Red AC–Mg3Al-LDH exhibited
superior photoluminous efficiency with a dual-color emission, while Allura Red AC and Allura Red AC–Zn3Al-LDH were
one-color systems. Decreased band gap energy of Allura Red AC–LDH which is lower than that of Allura Red AC caused
improved conductivity properties. Moreover, it was found from the DRS results that Allura Red AC–LDH could be regarded
as the adsorbent electromagnetic wave and as a cover to protect materials against the electromagnetic waves. Therefore, this
work provided a facile way for fabricating nanohybrids with two-color PL and controlling photoluminescent properties of
the nanohybrids which had potential applications in the area of photoluminescent materials.
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