Synthesis,crystal structures and spectroscopic properties of two Zn(II) Schiff’s base complexes of pyridoxal |
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| Authors: | Subhendu Naskar Sumita Naskar Hake M. Figgie William S. Sheldrick Shyamal Kumar Chattopadhyay |
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| Affiliation: | 1. Department of Chemistry, Bengal Engineering and Science University, Shibpur, Howrah 711 103, India;2. Lehrstuhl für Analytische Chemie, Ruhr-Universität Bochum, D-44780 Bochum, Germany |
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| Abstract: | Two mononuclear zinc(II) complexes, [ZnL1H2Cl]Cl·2H2O (1·Cl·2H2O) and [ZnL2HCl]·H2O (2·H2O) (L1H2 and L2H2 are N,N′-bis(pyridoxylidene)ethylenediamine and N,N′-bis(pyridoxylidene)1,3-propanediamine, respectively) have been synthesized and characterized by elemental analysis, FT-IR, fluorescence spectroscopy, TG–DTA and single crystal X-ray diffraction studies. The Zn(II) ion in complex 1 have a square pyramidal geometry with appreciable distortion towards trigonal bipyramid, whereas in 2 it has a geometry which is near the midpoint of square pyramid and trigonal bipyramid. The zinc atom is coordinated by two imine nitrogens, two phenolic oxygens and one chloride ion. The Zn(II) complexes show emission at 462 nm when excited at their lowest energy absorption at 372 nm. |
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| Keywords: | Pyridoxal Schiff&rsquo s bases X-ray crystal structure Supramolecular structure Fluorescence |
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