Syntheses, Crystal Structures, and Properties of Two Quaternary Selenite/Tellurite‐Nitrates with Formula of Bi(SeO3)(NO3) and Bi3(μ3‐OH)(TeO3)3(NO3)2

Abstract

AbstractHere, we report the preparation and characterization of two quaternary selenite/tellurite‐nitrates, namely, Bi(SeO3)(NO3) and Bi3(μ3‐OH)(TeO3)3(NO3)2 through a facile hydrothermal reaction. Bi(SeO3)(NO3) crystallizes in the centrosymmetric space group C2/c (No.15), which features a 2D [Bi(SeO3)]∞ layer in the ab plane and NO3− anions are located between the neighboring [Bi(SeO3)]∞ layers. Bi3(μ3‐OH)(TeO3)3(NO3)2 crystallizes in the noncentrosymmetric space group P‐62 m (No.189), which exhibits a rare bismuth‐oxo‐tellurite 1D tube that are separated by nitrate groups. This rare bismuth‐oxo‐tellurite 1D tube is formed by the interconnection of hexanuclear [Bi6(μ3‐OH)2O24] cage clusters and 1D chain of [Te3O10]∞. The nonlinear optical property of Bi3(μ3‐OH)(TeO3)3(NO3)2 has been studied and it produces a weak second harmonic generation (SHG) response that of 0.5×KDP (KH2PO4) due to the effect of the stereo‐active lone‐pairs on Bi3+ and Te4+ cations and π‐conjugated NO3 units in Bi3(μ3‐OH)(TeO3)3(NO3)2. IR, UV‐vis spectra and thermogravimetric analysis (TGA) for the two compounds were also measured.