TY - DATA T1 - External Electric Field Effect on Fluorescence Spectra of Pyrene in Solution PY - 2016/02/19 AU - Hung-Chu Chiang AU - Nobuhiro Ohta UR - https://acs.figshare.com/articles/journal_contribution/External_Electric_Field_Effect_on_Fluorescence_Spectra_of_Pyrene_in_Solution/2424577 DO - 10.1021/jp312740b.s001 L4 - https://ndownloader.figshare.com/files/4066369 KW - External Electric Field Effect KW - excimer fluorescence KW - application KW - nonradiative decay process KW - monomer fluorescence KW - pyrene N2 - Electrophotoluminescence (E-PL) spectra, i.e., plots of the electric-field-induced change in photoluminescence intensity as a function of wavenumber, have been measured for pyrene solution. At high concentrations of pyrene where excimer fluorescence is observed along with the monomer fluorescence emitted from the locally excited state, both excimer fluorescence and monomer fluorescence are enhanced by application of electric fields. The results show that the nonradiative decay process at the excimer emitting state is decelerated by application of electric fields. It is also found that molecular polarizability of pyrene excimer is larger than that of pyrene monomer in the ground state by ∼270 ± 90 Å3, based on the analysis of the Stark shift of the excimer fluorescence. ER -