Among polyaromatic hydrocarbons, fluorene- and spirobifluorene-based molecules have been recently studied as suitable candidates for electrogenerated chemiluminescence (ECL). We report the photophysical, electrochemical and ECL properties of a series of 2,7-disubstituted fluorene and spirobifluorene derivatives bearing triphenylamine groups. By introducing suitable donor or electron withdrawing substituents in the para position of triphenylamine, it was possible to tune the photoluminescence (PL) and ECL emission from blue to green. ECL properties were investigated by direct annihilation of radicals anion and cation, as well as by employing benzoyl peroxide as coreactant. The results were compared with our previous data on similar compounds, bearing unmodified triphenylamine substituents.
From blue to green: fine tuning in ECL emission of organic dyes
Rizzo Fabio;Bottaro Gregorio;Armelao Lidia;Quici Silvio
2014
Abstract
Among polyaromatic hydrocarbons, fluorene- and spirobifluorene-based molecules have been recently studied as suitable candidates for electrogenerated chemiluminescence (ECL). We report the photophysical, electrochemical and ECL properties of a series of 2,7-disubstituted fluorene and spirobifluorene derivatives bearing triphenylamine groups. By introducing suitable donor or electron withdrawing substituents in the para position of triphenylamine, it was possible to tune the photoluminescence (PL) and ECL emission from blue to green. ECL properties were investigated by direct annihilation of radicals anion and cation, as well as by employing benzoyl peroxide as coreactant. The results were compared with our previous data on similar compounds, bearing unmodified triphenylamine substituents.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
