Related Products of 3141-27-3In 2022 ,《Stable room temperature ferroelectricity in hydrogen-bonded supramolecular assemblies of ambipolar π-systems》 was published in Chemical Science. The article was written by Mukherjee, Anurag; Barman, Shubhankar; Ghosh, Anupam; Chakraborty, Saptarshi; Datta, Ayan; Datta, Anuja; Ghosh, Suhrit. The article contains the following contents:
This article reports H-bonding driven supramol. polymerization of naphthalimide (A)-thiophene (D)-naphthalimide (A) (ADnA, n = 1-4) conjugated ambipolar π-systems and its remarkable impact on room temperature ferroelectricity. Electrochem. studies confirm the ambipolar nature of these ADnA mols. with the HOMO-LUMO gap varying between 2.05 and 2.29 eV. Electron d. mapping from ESP calculations reveals intra-mol. 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. elec. field (P-E) measurements reveal stable room temperature ferroelectricity for these supramol. assemblies, most prominent for the AD2A system, with a Curie temperature (Tc) ∼ 361 K and saturation polarization (Ps) of ∼2μC cm-2 at a rather low coercive field of ∼2 kV cm-1. Control mols., lacking either the ambipolar chromophore or the amide functionality, do not show any ferroelectricity, vindicating the present mol. and supramol. design. Computational studies enable structural optimization of the stacked oligomer(s) of AD2A mols. and reveal a significant increase in the macro-dipole moment (in the range of 10-12 Debye) going from the monomer to the oligomer(s), which provides the rationale for the origin of ferroelectricity in these supramol. polymers. In the experimental materials used by the author, we found 2,5-Dibromothiophene(cas: 3141-27-3Related Products of 3141-27-3)
2,5-Dibromothiophene(cas: 3141-27-3) , is mainly used as pharmaceutical intermediate and synthesis intermediate. 2,5-Dibromothiophene polymerizes by debromination with magnesium catalyzed by nickel compounds to form poly(2,5- thienylene) .Related Products of 3141-27-3
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary