Abstract
An improvement in chitosan film photoluminescence was observed after adding LiClO4. FTIR spectra, XPS, DFT calculations, and XRD measurements show an alteration of the H-bonds and an increase in the amorphous character of chitosan. PL spectra display a growth in intensity in the visible region along with the incorporation of lithium, signaling a possible rise in the population density of tail states and, consequently, better photon absorption, as observed from UV-vis measurements. A mechanism through aggregation-induced emission effect is proposed to explain the different results. Although this work establishes the relation between structural changes provoked by LiClO4 incorporation and luminescence in the case of chitosan, we expect that the same approach could be generalized to similar polymeric structures.
| Original language | English |
|---|---|
| Pages (from-to) | 13763-13774 |
| Number of pages | 12 |
| Journal | ACS Omega |
| Volume | 8 |
| Issue number | 15 |
| DOIs | |
| State | Published - 18 Apr 2023 |
Bibliographical note
Publisher Copyright:© 2023 The Authors. Published by American Chemical Society.
Funding
This work employed the Imbabura cluster of Yachay Tech University, which was purchased under contract No. 2017-024 (SIE-UITEY-007-2017). The authors would like to acknowledge the internal grants CHEM19-15 and Proyecto 6: \u201CEstudio teo\u0301rico de los efectos geome\u0301tricos del a\u0301mbito cercano de los enlaces hidro\u0301genos y su efecto en la interaccio\u0301n con la luz\u201D of Yachay Tech University for supporting this work and providing the facilities required to carry out this work, as well as to Professor Ce\u0301sar Costa (Escuela Polite\u0301cnica Nacional in Ecuador), for his collaboration with the photoluminescence measurements.
| Funders | Funder number |
|---|---|
| Yachay Tech University | CHEM19-15, 2017-024, SIE-UITEY-007-2017 |