Schottky Device Fabrication of Linear Dicarboxylato-Bridged Mn(II) and Co(II) Coordination Polymers: Experimental and Theoretical Insights
Ersad Hossain, Ramjan Sk, Mainak Das, Partha Pratim Ray, Antonio Frontera, Mohammad Hedayetullah Mir, Subrata Mukhopadhyay
Abstract
In this study, we report the syntheses of two new coordination polymers (CPs) of Mn(II) and Co(II), [Mn(4-avp) 2 (adc)(H 2 O)]·(solvent) x ( 1 ) and [Co(4-avp) 2 (adc)(CH 3 OH) 2 ] ( 2 ), respectively, using relatively less explored linear linker acetylenedicarboxylic acid (H 2 adc) and polyaromatic hydrocarbon (PAH)–based monodentate N -donor ligand 4-[2-(9-anthryl)vinyl]pyridine (4-avp). CP 1 creates a two-dimensional (2D) structure in this instance, while CP 2 is made up of a 1D chain polymer. It is of interest that CP 1 and CP 2 exhibit semiconducting behavior and behave as Schottky barrier diodes. However, CP 1 exhibits higher conductivity and better Schottky diode formation when compared to CP 2, which relates to the charge transportation through space via π···π interactions present in CP 1 . The experimental results are well validated by theoretical density functional theory (DFT) prediction based on band gap and density-of-state (DOS) calculations. It is noteworthy that fabrication of Mn/Co-based Schottky devices appears to be inadequate in the literature. Thus, this work showcases a new direction for the development of electronic device fabrication.