A Study of Excimer Emission in Solutions of Poly(9,9-dioctylfluorene) Using Electrogenerated Chemiluminescence

• Published in: The journal of physical chemistry. A, Molecules, spectroscopy, kinetics, environment, & general theory Vol. 105; no. 3; pp. 520 - 523
• Main Authors: Prieto, Inmaculada, Teetsov, Julie, Fox, Marye Anne, Vanden Bout, David A, Bard, Allen J
• Format: Journal Article
• Language: English
• Published: American Chemical Society 25.01.2001
• ISSN: 1089-5639; 1520-5215
• DOI: 10.1021/jp003566i

We report electrochemical studies and the observation of excimer emission from the conjugated polymer poly(9,9-dioctylfluorene) (PDOF) in benzene−MeCN solutions during electrogenerated chemiluminescence (ECL). The ECL emission spectrum resulting from the annihilation reaction between PDOF radical ions is characterized by two bands, one at 438 nm and a broad band centered at 610 nm. The ECL emission at shorter wavelengths is assigned to intrapolymer emission of PDOF, while the emission at longer wavelengths arises from the excited-state complex of the polymer formed in the radical annihilation reaction. The relative excimer emission from PDOF (the ratio of excimer ECL emission to intrapolymer emission) depends on polymer concentration.