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Rare-earth-containing magnetic liquid crystals

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Abstract
Rare-earth-containing metallomesogens with 4-alkoxy-N-alkyl-2-hydroxybenzaldimine ligands are reported. The stoichiometry of the complexes is [Ln(LH)(3)(NO3)(3)], where Ln is the trivalent rare-earth ion;(Y, La, and Pr to Lu, except Pm) and LH is the Schiff base. The Schiff base ligands are in the zwitterionic form and coordinate through the phenolic oxygen only. The three nitrate groups coordinate in a bidentate fashion. The X-ray single-crystal structures of the nonmesogenic homologous complexes [Ln(LH)(3)(NO3)(3)]where Ln = Nd(III), Tb(III), and Dy(III) and LH = CH3OC6H3(2-OH)CH=NC4H9, are described. Although the Schiff base Ligands do not exhibit a mesophase, the metal complexes do (SmA phase). The mesogenic rare-earth complexes were studied by NMR, IR, EPR, magnetic susceptibility measurements, X-ray diffraction,and molecular modeling. The metal complexes in the mesophase have a very large magnetic anisotropy, so that these magnetic liquid crystals can easily be aligned by an external magnetic field.
Keywords
LANTHANIDE COMPLEXES, TRANSITION-TEMPERATURES, COPPER(II) COMPLEXES, X-RAY, METALLOMESOGENS, ANISOTROPY, LIGANDS, BIREFRINGENCE, EXCHANGE, SCHIFF-BASE

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Chicago
Binnemans, K, YG Galyametdinov, Rik Van Deun, DW Bruce, SR Collinson, AP Polishchuk, I Bikchantaev, et al. 2000. “Rare-earth-containing Magnetic Liquid Crystals.” Journal of the American Chemical Society 122 (18): 4335–4344.
APA
Binnemans, K, Galyametdinov, Y., Van Deun, R., Bruce, D., Collinson, S., Polishchuk, A., Bikchantaev, I., et al. (2000). Rare-earth-containing magnetic liquid crystals. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 122(18), 4335–4344.
Vancouver
1.
Binnemans K, Galyametdinov Y, Van Deun R, Bruce D, Collinson S, Polishchuk A, et al. Rare-earth-containing magnetic liquid crystals. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY. 2000;122(18):4335–44.
MLA
Binnemans, K, YG Galyametdinov, Rik Van Deun, et al. “Rare-earth-containing Magnetic Liquid Crystals.” JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 122.18 (2000): 4335–4344. Print.
@article{1190420,
  abstract     = {Rare-earth-containing metallomesogens with 4-alkoxy-N-alkyl-2-hydroxybenzaldimine ligands are reported. The stoichiometry of the complexes is [Ln(LH)(3)(NO3)(3)], where Ln is the trivalent rare-earth ion;(Y, La, and Pr to Lu, except Pm) and LH is the Schiff base. The Schiff base ligands are in the zwitterionic form and coordinate through the phenolic oxygen only. The three nitrate groups coordinate in a bidentate fashion. The X-ray single-crystal structures of the nonmesogenic homologous complexes [Ln(LH)(3)(NO3)(3)]where Ln = Nd(III), Tb(III), and Dy(III) and LH = CH3OC6H3(2-OH)CH=NC4H9, are described. Although the Schiff base Ligands do not exhibit a mesophase, the metal complexes do (SmA phase). The mesogenic rare-earth complexes were studied by NMR, IR, EPR, magnetic susceptibility measurements, X-ray diffraction,and molecular modeling. The metal complexes in the mesophase have a very large magnetic anisotropy, so that these magnetic liquid crystals can easily be aligned by an external magnetic field.},
  author       = {Binnemans, K and Galyametdinov, YG and Van Deun, Rik and Bruce, DW and Collinson, SR and Polishchuk, AP and Bikchantaev, I and Haase, W and Prosvirin, AV and Tinchurina, L and Litvinov, I and Gubajdullin, A and Rakhmatullin, A and Uytterhoeven, K and Van Meervelt, L},
  issn         = {0002-7863},
  journal      = {JOURNAL OF THE AMERICAN CHEMICAL SOCIETY},
  keyword      = {LANTHANIDE COMPLEXES,TRANSITION-TEMPERATURES,COPPER(II) COMPLEXES,X-RAY,METALLOMESOGENS,ANISOTROPY,LIGANDS,BIREFRINGENCE,EXCHANGE,SCHIFF-BASE},
  language     = {eng},
  number       = {18},
  pages        = {4335--4344},
  title        = {Rare-earth-containing magnetic liquid crystals},
  volume       = {122},
  year         = {2000},
}

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