Electron Energy Loss Under Scattering by Naphthalimide Derivatives Vapours

Abstract

ELdCTRON ENERGY LOSS UNDER SCATTERING BY MAPHTHALIMIDE DERIVATIVES VAPOURS KEY '/iORDS: e l e c t r o n energy l o s s spectroscopy, naphthalimide d e r i v a t i v e s , t r i p l e t s t a t e ABSTRACT E l e c t r o n energy l o s s s p e c t r a under s c a t t e r i n g o f e l e c t r o n s on 4-amino-N-(n-butylphenylene)-l,8-naphthal i m i d e and 4-methyla,1nino-N-(o-tolyl)-1,8-naphthalimide i n a vapour phase i s s t u d i e d . The primary e l e c t r o n energy w a s v a r i e d from 6 t o 60 eV and t h e s c a t t e r i n g angle w a s goo. It i s found t h a t t h e d i f f e r e n t i a l c r o s s s e c t i o n o f e x c i t a t i o n o f complex organic molecules i n t o some t r i p l e t s t a t e s can reach t h e same value as s i n g l e t ones.65

Spectroscopy of the interaction of a low-energy electron beam with organic luminescent molecules

“…On the whole, we have measured the EELSs and radiative properties for many molecules in the gas phase: polyphenyls and polyacenes [20], oxazoles and oxadiazoles [21], perylene [22], naphthalimide [23], fluorene-like molecules [17, 24±26], organic complexes of europium [27], dibenzoxazolylbiphenyl [28], DPEA [15], Alq 3 and triphenyldiamine [18], Irppy 3 [16], cyanines [29], etc.…”

“…As the electron energy increases, the fluorescence spectrum usually loses its vibrational structure, broadens, and shifts to the long wavelength side due to an increase in E vib (Fig. 7a) [23]. Such fluorescence spectra have a vibrational structure, in contrast to the structureless spectra obtained upon optical excitation up to the second S Ã 2 band [35].…”