Related Experiment Video
Updated: Nov 18, 2025
Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals
Published on: April 14, 2020
Synthesis, Structure, Photoluminescence, Energy Transfer Mechanism and Band Gap of a Terbium-Mercury Complex with a
Abstract:
A novel terbium-mercury compound [Tb(IA)3(H2O)2(Hg2Cl4)]n·nHgCl2·nH2O (1, HIA = isonicotinic acid) was prepared via a hydrothermal reaction and structurally characterized through single-crystal X-ray diffraction technique. This compound is characterized by a three-dimensional (3-D) framework. Photoluminescence experiments with solid-state samples uncovered that this compound can show yellow light emission with the emission peaks at 490, 545, 586 and 621 nm, respectively. These photoluminescence emission peaks are originated from the characteristic emission of the 4f electrons intrashell transition of the 5D4 → 7FJ(J = 6, 5, 4, 3) of the Tb3+ ions. An energy transfer mechanism is expatiated by applying the energy level figure of the terbiumions and isonicotinic acid. This compound possesses a remarkable CIE chromaticity coordinates (0.3525, 0.4032). A wide optical band gap of 2.51 eV of the title compound is determined by using the solid-state UV/Vis diffuse reflectance spectroscopy.
More Related Videos
06:06A Simple Dewar/Cryostat for Thermally Equilibrating Samples at Known Temperatures for Accurate Cryogenic Luminescence Measurements
Published on: July 19, 2016
08:31Luminescence Resonance Energy Transfer to Study Conformational Changes in Membrane Proteins Expressed in Mammalian Cells
Published on: September 16, 2014
Related Concept Videos
02:42Valence Bond Theory
01:23Photoluminescence: Fluorescence and Phosphorescence
A pair of electrons in a...
01:26Variables Affecting Phosphorescence and Fluorescence
02:27Predicting Molecular Geometry
03:02Colors and Magnetism
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...