Related Experiment Video
Updated: Sep 10, 2025

Preparation, Purification, and Characterization of Lanthanide Complexes for Use as Contrast Agents for Magnetic Resonance Imaging
Published on: July 21, 2011
Preparation, structure, characterization and Properties of a novel [Y(HIA)3(H2O)2]n•nYCl3 (HIA = isonicotinic acid)
Kun-Zhong Yang1, Rong Zou2, Xiu-Guang Yi3
1. 18279104993@163.com.
Abstract:
A novel yttrium complex [Y(HIA)3(H2O)2]n·nYCl3 (HIA = isonicotinic acid). has been synthesized via a hydrothermal reaction and characterized by single crystal X-ray diffraction technique. The title complex features a one-dimensional (1-D) chain-like structure. A solid state photoluminescence measurement revealed that there is one strong emission peak at 487 nm. These peak can be assigned to the characteristic the electronic transition and stacking effect inside the ligand. The title complex shows CIE chromaticity coordinates in the blue region (0.1049, 0.1221). At the same time, the title complex has a wide band gap of 2.03 eV, which was revealed by a solid-state UV/Vis diffuse reflection experiment.
Related Concept Videos
Coordination Compounds and Nomenclature
Valence Bond Theory
Preparation of Nitriles
Formation of Complex Ions
Crystal 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,...
Diazonium Group Substitution: –OH and –H

