Novel semiconducting metal-organic framework: Synthesis, structural characterisation and electrical conductivity studies of manganese based two dimensional coordination polymer

New Manganese(II) dichloro and pyrazine bridged coordination polymer containing rectangular framework [Mn(μ-pz)(μ-Cl)2]n was synthesised and structurally characterised. Single crystal X-ray structure of the coordination polymer [Mn(μ-pz)(μ-Cl)2]n displayed 2D rectangular framework with infinite sheet structure. Thermogravimetric analysis showed that the [Mn(μ-pz)(μ-Cl)2]n coordination polymer is stable and robust up to 310 °C. Electrical conductivity measurements of [Mn(μ-pz)(μ-Cl)2]n were carried out as a function of frequency at various temperatures and the coordination polymer exhibited semiconducting property with activation energy Ea = 0.70 (± 0.03) eV.

Graphical abstractManganese based coordination polymer [Mn(μ-pz)(μ-Cl)2]n has been synthesised and characterised. Single crystal X-ray structure reveals that the coordination polymer exhibits 2D sheet structure with rectangular framework. Electrical conductivity studies of this coordination polymer exhibited semiconducting behaviour with activation energy Ea = 0.7 eV.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Novel two dimensional coordination polymer [Mn(μ-pz)(μ-Cl)2]n was synthesised. ► Manganese based metal-organic framework was structurally characterised. ► Crystal structure exhibited rectangular framework with infinite sheet structure. ► Conductivity study of coordination polymer displayed semiconducting behaviour. ► Thermogravimetric analysis revealed the robust nature of coordination polymer.