Abstract
Bitumen (BIT) is an oil sub-product with many applications. A variety of literature reports the analysis of its optical properties, as the fluorescence and the Fourier transform infrared (FT-IR) optical transmittance (OT). We have performed photoluminescence (PL) on the visible region of the spectrum and OT on the visible-NIR in solutions of BIT in toluene at different concentrations. The results revealed a nonlinear, concentration-dependent effect attributed to intermolecular solvent–solute interactions. PL analysis of pure BIT as a function of the temperature and the laser pumping power pointed to the existence of nanosized crystalline inclusions on the amorphous BIT matrix with noticeable optical properties. The inference was confronted with the results of X-ray diffraction studies and literature reports. The possibility of the occurrence of a quantum size effect governing the luminescence is considered.
© 2022 The Author(s)
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription