B-N Fused Anthracene as Functional Linker for π-Extended Viologens: Near-IR Emission and Electrochromism.

ABSTRACT: As prototypical organic electrochromic materials viologens have been extensively studied in display technologies, smart materials, and energy storage applications. Their properties can be fine-tuned by introducing different substituents on the pyridine rings, fusion with heteroatoms, or insertion of π-conjugated linkers. In this article we study the effect of B-N fused dipyridylanthracene (BDPA) as a novel linker unit in viologens on the electronic structure, optical properties, and electrochromic characteristics. Quaternization of pyridyl-functionalized BDPA (1Py) by N-methylation or complexation with B(C₆F₅)₃ as a powerful Lewis acid gives rise to two fundamentally different π-extended viologens, dicationic [1Py-Me](PF₆)₂, and the ne

SUBMITTER: Nandi RP 

PROVIDER: S-EPMC12851006 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature