First-order hyperpolarizability of triphenylamine derivatives containing cyanopyridine: molecular branching effect - Fonseca, Ruben D.; Vivas, Marcelo G.; Silva, Daniel Luiz; Eucat, Gwennaelle; Bretonnière, Yann; Andraud, Chantal; De Boni, Leonardo; Mendonça, Cleber Renato (Journal of Physical Chemistry C, 2018)