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A robust Ti(iv)-based mesogen constructed around a TiO4N2 core.

L Barloy1, B Heinrich, L Douce

  • 1Laboratoire de Chimie Moléculaire de l'Etat Solide, UMR 7140 UDS-CNRS, Université de Strasbourg, 4 rue Blaise Pascal, F-67000 Strasbourg, France. mobian@unistra.fr.

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Summary
This summary is machine-generated.

New titanium complexes with unique bipyrimidine ligands were synthesized. One complex displays liquid crystal properties and self-assembly due to its specific molecular structure.

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Area of Science:

  • Organometallic Chemistry
  • Materials Science
  • Crystallography

Background:

  • Titanium complexes are versatile in catalysis and materials science.
  • Ligand design is crucial for tuning complex properties, including self-assembly and phase behavior.
  • Biphenolato and bipyrimidine ligands offer distinct coordination environments.

Purpose of the Study:

  • To synthesize novel titanium complexes incorporating 2,2'-bipyrimidine derivatives.
  • To investigate the self-assembly and liquid crystalline properties of these titanium complexes.
  • To correlate molecular conformation with observed material behaviors.

Main Methods:

  • Synthesis of titanium complexes using 6,6'-diphenyl-2,2'-biphenolato and 2,2'-bipyrimidine ligands.
  • Characterization of the synthesized complexes using spectroscopic and analytical techniques.
  • Analysis of liquid crystalline behavior and crystalline state self-assembly.

Main Results:

  • Stable titanium complexes, [Ti(1a)(2)2] and [Ti(1b)(2)2], were successfully synthesized.
  • The complex [Ti(1b)(2)2], featuring long alkyl chains (C16) on the diimine ligand, exhibited liquid crystal behavior.
  • The molecular conformation of the complexes was identified as key to their self-assembling and liquid crystalline properties.

Conclusions:

  • Novel titanium complexes with tailored bipyrimidine ligands can be synthesized.
  • The incorporation of specific substituents, like long alkyl chains, can induce liquid crystallinity in titanium complexes.
  • Molecular conformation plays a critical role in dictating the supramolecular organization and material properties of these complexes.