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      https://www.ias.ac.in/article/fulltext/jcsc/127/05/0865-0872

    • Keywords

       

      Mononuclear zinc(II); Schiff base; versatile acetate; X-ray structure; luminescence.

    • Abstract

       

      Two mononuclear compounds of the types pentacoordinated [Zn(L1)(OAc)]PF6·H2O (1) and hexacoordinated [Zn(L2)(OAc)]PF6 (2) [L1 = N,N′-(bis(pyridin-2-yl)formylidene)-1,3-propanediamine; L2 = N,N′-(bis(pyridin-2-yl)benzylidene)-1,4-butanediamine] have been synthesized using one-pot reactions of a 1:1:1 molar ratio of Zn(OAc)2.2H2O, L1/L2, ammonium hexafluorophosphate in MeOH at room temperature. Compounds 1 and 2 are characterized on the basis of microanalytical, spectroscopic, thermal and other physicochemical results. Single crystal X-ray structural study reveals that the zinc(II) centre in 1 is coordinated by four N atoms of the Schiff base L1 and one O atom of terminal acetate with a ZnN4O chromophore, whereas in 2, the zinc(II) centre is bound by four N atoms of the tailored Schiff base L2 and two O atoms of the chelated acetate. In the crystalline state, mononuclear units in 1 are engaged in weak cooperative intermolecular O-H⋯O and C-H⋯F hydrogen bonds affording a 1D chain. The individual units of 2 are packed by 𝜋 ⋯ 𝜋 and anion⋯ 𝜋 interactions to form a 2D sheet structure. The complexes show reasonable thermal stabilities and display intraligand 𝜋 $\to$ 𝜋 fluorescence in solid state at room temperature.

    • Author Affiliations

       

      Ashis Kumar Maji1 Subhasis Roy1 Somnath Choubey1 Rajarshi Ghosh1 Barindra Kumar Ghosh1

      1. Department of Chemistry, The University of Burdwan, Burdwan 713 104, India
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  • Journal of Chemical Sciences | News

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