The Effects of Halogen Exchange on the Structural Features, Thermal Behavior and Photoluminescence of Y/Eu Layered Rare-Earth Hydroxide (LRH) Nanosheets

Abstract:

Solid-solution nanosheets (down to ~5 nm thick, in the form of flower like assemblies) of the (Y_0.95Eu_0.05)₂NO₃∙nH₂O were directly synthesized via chemical precipitation at the freezing temperature of ~4°C. In situ exchange of the interlayer NO₃^- with halogen anions produced a series of halogen derivatives (Y_0.95Eu_0.05)₂X∙nH₂O (X= F^-, Cl^-, Br^- and I^-) of the same layered structure and two-dimensional crystallite morphology. The basal spacing of the derivatives was discussed from the geometric size/spatial orientation of the anions and also from anion-host interaction via electrostatic attraction and hydrogen bonding. The thermal behavior and photoluminescence spectroscopies were found to be strongly related to the anion-host interactions.

• Periodical: Solid State Phenomena (Volume 281)
• Pages: 667-672
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.281.667
• Online since: August 2018
• Authors: Jun Jie Huang, Qiu Rong Liu, Rui Zhang, Xiao Li Wu
• Keywords: Anion Exchange, Nanosheets, Photoluminescence, Structure Features

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