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Hanifehpour, Younes,Joo, Sang Woo,Min, Bong-Ki Springer 2013 Nanoscale research letters Vol.8 No.1
<P>Lu<SUP>3+</SUP>/Yb<SUP>3+</SUP> and Lu<SUP>3+</SUP>/Er<SUP>3+</SUP> co-doped Sb<SUB>2</SUB>Se<SUB>3</SUB> nanomaterials were synthesized by co-reduction method in hydrothermal condition. Powder X-ray diffraction patterns indicate that the Ln<SUB><I>x</I></SUB>Ln<SUP>′</SUP><SUB><I>x</I></SUB>Sb<SUB>2−2<I>x</I></SUB>Se<SUB>3</SUB> Ln: Lu<SUP>3+</SUP>/Yb<SUP>3+</SUP> and Lu<SUP>3+</SUP>/Er<SUP>3+</SUP> crystals (<I>x</I> = 0.00 − 0.04) are isostructural with Sb<SUB>2</SUB>Se<SUB>3</SUB>. The cell parameters were increased for compounds upon increasing the dopant content (<I>x</I>). Scanning electron microscopy and transmission electron microscopy images show that co-doping of Lu<SUP>3+</SUP>/Yb<SUP>3+</SUP> ions in the lattice of Sb<SUB>2</SUB>Se<SUB>3</SUB> produces nanorods, while that in Lu<SUP>3+</SUP>/Er<SUP>3+</SUP> produces nanoparticles, respectively. The electrical conductivity of co-doped Sb<SUB>2</SUB>Se<SUB>3</SUB> is higher than that of the pure Sb<SUB>2</SUB>Se<SUB>3</SUB> and increases with temperature. By increasing the concentration of Ln<SUP>3+</SUP>ions, the absorption spectrum of Sb<SUB>2</SUB>Se<SUB>3</SUB> shows red shifts and some intensity changes. In addition to the characteristic red emission peaks of Sb<SUB>2</SUB>Se<SUB>3</SUB>, emission spectra of co-doped materials show other emission bands originating from <I>f</I>-<I>f</I> transitions of the Yb<SUP>3+</SUP> ions.</P>
Hanifehpour, Y.,Morsali, A.,Soltani, B.,Mirtamizdoust, B.,Joo, S.W. Elsevier Science 2017 Ultrasonics sonochemistry Vol.34 No.-
Ultrasound was used to synthesize nano-structures of [Ni(bpzB)<SUB>2</SUB>]<SUB>2</SUB>(1), a new two-nuclear discrete-coordination compound of divalent nickel with bis-pyrazolyl borate(bpzB). The nanostructure was characterized by scanning electron microscopy, X-ray powder diffraction, infrared, and elemental analysis. The single-crystal X-ray data show that the coordination number of Ni(II) ions is four (Ni1N<SUB>4</SUB> and Ni2N<SUB>4</SUB>) with square planar geometry. The supramolecular features in these complexes are guided and controlled by weak directional intermolecular interactions. The discrete molecules interact with each other through labile interactions, creating a 3D supramolecular framework.