Stable room temperature ferroelectricity in hydrogen-bonded supramolecular assemblies of ambipolar π-systems.

ABSTRACT: This article reports H-bonding driven supramolecular polymerization of naphthalimide (A)-thiophene (D)-naphthalimide (A) (AD _n A, n = 1-4) conjugated ambipolar π-systems and its remarkable impact on room temperature ferroelectricity. Electrochemical studies confirm the ambipolar nature of these AD _n A molecules with the HOMO-LUMO gap varying between 2.05 and 2.29 eV. Electron density mapping from ESP calculations reveals intra-molecular charge separation as typically observed in ambipolar systems. In the aggregated state, AD₁A and AD₂A exhibit bathochromically shifted absorption bands while AD₃A and AD₄A show typical H-aggregation with a hypsochromic shift. Polarization vs. electric field (P

SUBMITTER: Mukherjee A 

PROVIDER: S-EPMC8768847 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature