フェニルビオロゲンラジカルカチオンと中性体の吸収スペクトル解析：濃度依存性π-二量体形成の影響

Analysis of Absorption Spectra of Phenyl Viologen Radical Cation (PV•⁺) and Neutral Species (PV⁰) – Impact of Concentration-Dependent π-Dimer Formation

Abstract: Phenyl viologen (PV) is a bipyridinium dication that exhibits distinct optical properties upon stepwise reduction. The one-electron reduced radical cation PV•⁺ shows a strong visible absorption, while the two-electron reduced neutral form PV⁰ displays a different spectral profile. Notably, PV•⁺ can reversibly form a π-dimer (“pimer”) in soluti…