Related Experiment Video
Updated: Aug 5, 2026

Fabrication Procedures and Birefringence Measurements for Designing Magnetically Responsive Lanthanide Ion Chelating Phospholipid Assemblies
Published on: January 3, 2018
Ce(2,2'-bipyridyl)3(SCN)3: Lanthanide Coordination- and Hydrogen-Bond-Directed Binary π-Conjugated Assemblies with
Quan-Wei Zhang1, Zi-Han Tian1, Ming-Xing Wu1
1Precise Synthesis and Function Development Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University, Nanchong637002, China.
Abstract:
Exploring high-performance birefringent crystals holds paramount significance in modern optics, yet traditional candidates generally struggle to reconcile substantial birefringence with broad spectral transparency. To circumvent this long-standing bottleneck, a synergistic multifunctional-group assembly strategy has been devised to guide the rational design of birefringent crystals. Correspondingly, driven by lanthanide coordination and hydrogen bonding, two kinds of π-conjugated units were successfully incorporated into a new birefringent crystal, Ce(2,2'-bipyridyl)3(SCN)3. Synthesized via a facile solution evaporation method, Ce(2,2'-bipyridyl)3(SCN)3 was characterized by a large birefringence of 0.18@546 nm, broad transmission windows (nearly spanning 0.445-25 μm), and moderate thermal stability (up to 270 °C), making it favorable for practical applications.
Related Concept Videos
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...
Coordination Number and Geometry
Colors 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 eye.
