Syntheses, characterisation, magnetism and photoluminescence of a homodinuclear Ln(III)-Schiff base family

Dalton Transactions : an International Journal of Inorganic Chemistry
Joy ChakrabortySamiran Mitra

Abstract

A novel family of homodinuclear complexes of the general formula [Ln(2)L(2)(X)(2)] (where Ln = Nd(3+), Pr(3+), Sm(3+) and Tb(3+) for 1, 2, 3 and 4, respectively and X, the coordinated NO(3)(-) or Cl(-) anion) has been synthesised from the corresponding lanthanide(III) salts with the pentadentate dianionic Schiff base ligand, H(2)L [N(1),N(3)-bis(salicylideneimino)diethylenetriamine], that exhibits a N(3)O(2) donor set. Single crystal X-ray diffraction studies evidenced the isostructurality of this family of centrosymmetric neutral dinuclear entities where the Ln(III) metal centres are coupled together by two phenolato oxygen atoms belonging to two units of ligand (H(2)L). Interestingly, the two other phenolato groups of H(2)L are mono-coordinated to the metal ions. Temperature dependence (2-300K) magnetic susceptibility studies suggest the presence of an antiferromagnetic interaction operating via double phenolato bridges. Photoluminescence activities of the complexes have been studied and compared with their precursor ligand. All the complexes have been characterised with microanalytical and several spectroscopic techniques.

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Citations

Feb 4, 2014·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Jong Cheol LeeJun-Gill Kang
Mar 18, 2017·Inorganic Chemistry·Sandeep K GuptaRamaswamy Murugavel
Apr 14, 2015·Dalton Transactions : an International Journal of Inorganic Chemistry·Masoud MirzaeiAntonio Frontera
Oct 30, 2012·Dalton Transactions : an International Journal of Inorganic Chemistry·Ivan NemecZdeněk Trávníček
Oct 30, 2014·Luminescence : the Journal of Biological and Chemical Luminescence·G R SumanN M Nanje Gowda
Feb 6, 2017·Dalton Transactions : an International Journal of Inorganic Chemistry·T LacelleM Murugesu
Mar 16, 2013·Chemistry : a European Journal·David AguilàGuillem Aromí

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