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      https://www.ias.ac.in/article/fulltext/jcsc/128/09/1377-1384

    • Keywords

       

      Cadmium(II); coordination polymers; benzidine; thiocyanate; X-ray structures; luminescence.

    • Abstract

       

      The syntheses, characterizations and structures of a neutral 2D coordination polymer [Cd(bnzd)(NCS)₂]n (1) and a polycationic 3D coordination polymer isolated as perchlorate salt [Cd(bnzd)₃]n(ClO₄)₂n (2) (bnzd = benzidine) are described. X-ray structural analyses reveal that each hexacoordinated cadmium(II) center in 1 adopts a distorted octahedral geometry with a CdN₄S₂ chromophore bound by two N atoms of two different bnzd units and two N and two S atoms of symmetric doubly bridged end-toend NCS− units extended in a 2D sheet. Six N atoms of six different bridged bnzd units are bonded to each cadmium(II) in 2 in a non-ended fashion affording a 3D network structure. In the crystalline state, each 2D sheet structure in 1 is further stabilized by π· · ·π interaction which in turn affords a 3D network structure through multiple intermolecular N-H· · · S hydrogen bonds. On the other hand, the 3D network structure in 2 is stabilized by weak intermolecular N-H· · ·O hydrogen bonds and C-H· · ·π interactions. Bnzd, 1 and 2 display intraligand 1(π-π*) fluorescence in DMF solution at room temperature.

    • Author Affiliations

       

      DIPU SUTRADHAR1 HABIBAR CHOWDHURY2 SUSHOVAN KONER1 SUBHASIS ROY1 BARINDRA KUMAR GHOSH1

      1. Department of Chemistry, The University of Burdwan, Burdwan, West Bengal, 713 104, India
      2. Department of Chemistry, Kabi Nazrul College, Murarai, Birbhum, West Bengal, 731 219, India
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    • Supplementary Material

       
  • Journal of Chemical Sciences | News

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