Abstract

A new compound [Gd(H₂O)₄(HIA)₂(NO₃)](2NO₃) (1; HIA is isonicotinic acid) is reported. The Gd³⁺ cation is coordinated by eight oxygen atoms and exhibit a square antiprismatic GdO₈ geometry. A three-dimensional (3-D) supramolecular framework is formed by hydrogen bond interactions. The photoluminescence absorption peak is ascribed to the ⁸S_7/2→⁶I _J , while the photoluminescence emission peaks are originated from the characteristic emission of the ⁶P_5/2→⁸S_7/2 and ⁶P_7/2→⁸S_7/2 transitions of Gd³⁺ ions. A solid-state UV/Vis diffuse reflectance spectrum reveals that it shows a wide optical band gap of 3.17 eV.

A new gadolinium compound is reported. It features a 3-D supramolecular framework formed by hydrogen bond interactions. The photoluminescence absorption peak is ascribed to the ⁸S_7/2→⁶I _J , while the emission is originated from the characteristic emission of the ⁶P_5/2→⁸S_7/2 and ⁶P_7/2→⁸S_7/2 transitions of the Gd³⁺ ion. It possesses a wide optical band gap of 3.17 eV.

摘要

报道了一种新化合物[Gd（H ₂ O）₄（HIA）₂（NO ₃）]（2NO ₃）（1； HIA为异烟酸）。Gd ³⁺阳离子由八个氧原子配位，并呈现方形反棱形GdO ₈几何形状。通过氢键相互作用形成三维（3- D）超分子框架。光致发光吸收峰归因于⁸ S _7/2 → ⁶ I _J，而光致发光发射峰源自⁶ P _5/2 →的特征发射 Gd ³⁺离子的⁸ S _7/2和⁶ P _7/2 → ⁸ S _7/2跃迁。固态UV / Vis漫反射光谱表明，它显示出3.17 eV的宽光学带隙。

报道了一种新的compound化合物。它具有通过氢键相互作用形成的3- D超分子框架。光致发光吸收峰归因于⁸ S _7/2 → ⁶ I _J，而发射源自⁶ P _5/2 → ⁸ S _7/2和⁶ P _7/2 → ⁸ S ₇的特征发射。Gd ³⁺离子的_{/ 2}跃迁。它具有3.17 eV的宽光学带隙。