Effective π-electron number and symmetry perturbation effect on the two-photon absorption of oligofluorenes - Abegão, Luis Miguel Gomes; Cocca, Leandro Henrique Zucolotto; Mulatier, Jean-Christophe; Pitrat, Delphine; Andraud, Chantal; Misoguti, Lino; Mendonça, Cleber Renato; Vivas, Marcelo Gonçalves; De Boni, Leonardo (Physical Chemistry Chemical Physics, 2021)