title: Syntheses, characterisation, magnetism and photoluminescence of a homodinuclear Ln(III)-Schiff base family.
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.
authors.affiliation: Department of Chemistry, Jadavpur University, Raja S. C. Mullick Road, Kolkata, 700032, India.
authors.forename: Joy
authors.initials: J
authors.lastname: Chakraborty
authors.forename: Aurkie
authors.initials: A
authors.lastname: Ray
authors.forename: Guillaume
authors.initials: G
authors.lastname: Pilet
authors.forename: Guillaume
authors.initials: G
authors.lastname: Chastanet
authors.forename: Dominique
authors.initials: D
authors.lastname: Luneau
authors.forename: Raymond F
authors.initials: RF
authors.lastname: Ziessel
authors.forename: Loïc J
authors.initials: LJ
authors.lastname: Charbonnière
authors.forename: Luca
authors.initials: L
authors.lastname: Carrella
authors.forename: Eva
authors.initials: E
authors.lastname: Rentschler
authors.forename: M S
authors.initials: MS
authors.lastname: El Fallah
authors.forename: Samiran
authors.initials: S
authors.lastname: Mitra