Related Experiment Video
Updated: Jun 24, 2026

Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals
Published on: April 14, 2020
Optical investigation of Sm(III)-beta-diketonate complexes with different neutral ligands
1Department of Chemical Engineering, Huizhou University, Huizhou 516007, China. lianghao@ustc.edu
Abstract:
The optical properties of three Sm(III)-beta-diketonate complexes with different neutral ligands in methyl methacrylate have been investigated and the influence of the neutral ligand on fluorescence emission, Judd-Ofelt intensity parameters and metastable state lifetime was analyzed. The eta intensity parameters and Judd-Ofelt intensity parameters were obtained from fluorescence emission spectra and absorption spectra, respectively. The metastable state lifetime measurements correspond with the results obtained from fluorescence emission spectra and absorption spectra.
Related Concept Videos
Valence Bond Theory
EDTA: Chemistry and Properties
Complexometric Titration: Ligands
Stereoisomerism
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...
Metal-Ligand Bonds
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
Crystal Field Theory - Octahedral Complexes
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...

