Preparation and Physicochemical Properties of Organic Semiconducting Materials from the Reaction of Imidazo[1,2‐ a ]pyridines with Tetracyanoethylene
Year: 2023
Type: article
Abstract: Organic donor‐acceptor (DA) complexes have emerged in recent years as materials of choice for organic binary electronics. The reactivity descriptors derived from the conceptual DFT reveal imidazo[1,2‐ a ]pyridines as potential donors. Thus, four imidazo[1,2‐ a ]pyridines were reacted with tetracyanoethylene (TCNE) in 1 : 2 molar ratio to afford four new DA complexes. The spectral studies, namely IR, 1 H, 13 C, DEPT 135, 2D HMQC NMR, and HRMS were used to establish structures of the products. The UV‐vis. spectroscopy reveals intramolecular charge transfer. All the four compounds fluoresce giving excitation emission fluorescence spectra with a red shift ranging from 64 to 151 nm and quantum yields from 0.004 to 16.35. Unexpectedly, nitro group in one of the products does not act as quencher; instead, it enhances the quantum yield to make it highest in this series. The products exhibit electrical conductivity which increases with temperature. The FESEM and HRTEM images reveal distinct and homogenous surface morphology with holes which facilitate flow of electrons as manifested by electrical conductivity. The powder XRD and SAED results establish the polycrystalline nature of the products. The theoretical studies indicate an alternate donor acceptor stacking pattern.
Source: ChemistrySelect
Authors: Chandani Mathur, Raakhi Gupta, Raj K. Bansal, Sonia Swami, Ankita Sheoran, Deepak B. Salunke
Institutions: Inspiration Innovation Synergy University, Panjab University
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4388300302