Liquid crystals lanthanide-containing,

Another approach to obtain luminescent lanthanide-containing liquid crystals is by dissolving a luminescent lanthanide complex in a suitable liquid crystal host matrix. The advantage of this method is that the luminescence and mesomorphic properties can independently be optimised. This allows easier access to nematic lanthanide-containing liquid... 

Figure 99 Various Schiff-base ligands used to form lanthanide-containing liquid-crystals.

Figure 102 Enaminoketone ligand used to generate lanthanide-containing liquid crystals, [Ln(LH)(L)2]pC]2.

Aqueous aliquots of the macromolecule and lanthanide salt, both in the same buffer of known pH and ionic strength are mixed. Slow evaporation of the mixture containing an excess of lanthanide salt results in crystallization of the complex. Centrifugation and decantation of the supernatant liquid gives the solid complex. Repeated extraction with alcohol will remove the excess lanthanide salt [78]. 

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