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ABSTRACT
A heterocyclic liquid crystalline Schiff's base, N-(4′-(4″-hexyl-1H-1″,2″,3″-triazol))-4-dodecyloxysalicylaldimine (HL), and a series of lanthanide(III) complexes of the type [Ln(LH)3(NO3)3] (LnIII = La, Pr, Nd, Sm, Eu, Tb, and Dy) have been synthesized and characterized by elemental analyses, mass spectrometry, FTIR, NMR, and UV-Vis spectral techniques. All the complexes involve binding of HL (through phenolate oxygen in zwitter-ionic form) and bidentate chelation of nitrato groups. The ligand exhibits smectic-A (SmA) mesophase over a wide temperature range as evidenced by DSC and polarizing optical microscopic studies. Fluorescence studies show emissions of HL and TbIII complex.
Funding
T. R. Rao, gratefully acknowledges the financial grant received from the Council of Scientific & Industrial Research, New Delhi [vide grant No. 01/2321/09/EMR/II] and M. Karunakar is grateful to the University Grants Commission (UGC), New Delhi, India, for providing financial assistance under research fellowship scheme for meritorious students.
