Cone motion viscosity and optical second harmonic generation of ferroelectric liquid crystalline dendrimers

Örtegren, Jonas; Busson, P.; Gedde, Ulf W.; Hult, Anders; Eriksson, Anders; Lindgren, Mikael; Andersson, Gunnar

doi:10.1080/02678290110039138

Cited by 4 publications

(1 citation statement)

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“…Barring few examples, lanthanide complexes have received scant attention for the design of second‐order NLO‐phores. Thus, while organic materials have received rather extensive attention for NLO applications, NLO‐active metallomesogens are quite rare, and the family of lanthanidomesogens remained virtually unexplored.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional Lanthanide Complexes: Mesomorphism, Photoluminescence and Second Order NLO Property

et al. 2018

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A series of new mononuclear multifunctional lanthanide(III)‐Schiff base complexes have been synthesized and characterized by elemental analyses, FTIR, 1H NMR and UV/Vis spectroscopy. Potentially tridentate, the Schiff‐base ligand is based on a ‘salicyldimine’ core with a long and flexible alkoxy group which coordinates to lanthanide ions in its zwitterionic form via the phenolic‐oxygen with the proton shifted to the imine‐nitrogen. The chelate nitrato groups complete a nine‐coordinate geometry. The ligand is non‐mesomorphic, while coordination to Ln3+ ion induces a liquid crystalline behavior. The complexes exhibited a thermally stable highly viscous partially bilayer smectic Ad phase in the 45‐135°C temperature range. The molecular organization of the complexes in the mesophase is conjectured to be based on a cylindrical‐like dimeric structure with the three alkoxy group pointing up and three pointing down assembling laterally into a lamellae. The Schiff base ligand is a blue light emitter exhibiting a broad emission maximum at 435 nm while the lanthanide complexes show an intense green emission. The Tb3+ complex, interestingly, also showed mesophase luminescence. The ligand and its complexes of La3+, Dy3+ and Yb3+ exhibited a significant second order non‐linear optical (NLO) activity representing the first example of lanthanidomesogens to exhibit such behaviour.

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Section: Introductionmentioning

confidence: 99%