Articles written in Journal of Chemical Sciences

    • Comparative Studies on Optical and Electronic Behavior of Lanthanide-based Coordination Polymers: Synthesis, Structure, Absorption-Emission and Magnetic Properties


      More Details Abstract Fulltext PDF

      A series of lanthanide(III) based coordination polymers have been synthesized using chelidamic acid (CA) as a ligand, [Ln(C7H2NO5 (H2O)3]. H2O (Ln = Eu, Gd, Tb, and Dy). All the compounds were prepared by solvothermal technique using H2O-DMF as solvents (4:1, volume ratio). Compounds were characterized through various instrumental techniques such as single-crystal X-ray diffraction, powder X-ray diffraction, thermogravimetric analysis, IR spectroscopy, etc. In all the cases lanthanide ion adopts distorted dodecahedrongeometry. And these dodecahedrons are connected through chelidamic acid ligand to form the two-dimensional structure. These layers are H-bonded to form the three-dimensional supramolecular structure. The optical bandgap energy measurements exhibit that the variation of the band gap energy is independent of the f -electrons. This is due to the weak bonding connectivity between the metal ion and ligands, which could not perturb the density ofstates significantly. The variable-temperature magnetic measurements exhibit the paramagnetic behavior of all the compounds though the effective magnetic moments rise with increasing number of f -electrons. The present study illustrates the usefulness of the lanthanides for the structure building as well as the role of f -electrons for opto-electronic behaviors.

  • Journal of Chemical Sciences | News

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

© 2017-2019 Indian Academy of Sciences, Bengaluru.