Counterion-Mediated Luminophore Dimerization.

ABSTRACT: Emissive organic salts have long been integral to the discovery of fluorescence phenomena and functional luminescent dyes. Typically, one component of the salt acts as the photoactive unit (luminophore) and its nonemissive counterion is selected to independently tune bulk physical properties, such as solubility. However, the impact of counterion choice on the aggregation and resulting emissive state of organic salts in solution has not been widely investigated. Here, we report that a single cationic luminophore gives rise to either monomer, dimer, excimer, or multichromatic emission under otherwise identical conditions by varying only its counterion. We employ N-methyl quininium (MeQn⁺) as a permanently charged cationic luminophore, which we pair with a series of monovalent anio

SUBMITTER: Carter AG 

PROVIDER: S-EPMC12363632 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature