Abstract
Optical limiting properties of 3,5-diphenyldibenzo-azaBODIPY were investigated by using the z-scan technique at 532 nm in the nanosecond pulse range and a strong reverse saturable absorption (RSA) response was observed, which can be readily attributed to a two-photon absorption (TPA) assisted excited state absorption (ESA) mechanism in the singlet manifold based on a consideration of the other photophysical properties. The effect of solvent and incorporation into polymer thin films has been investigated in depth. The results indicate that the selection of solvents that enhance the population of the S1 excited state on the nanosecond timescale or embedding the azaBODIPY dye into polymer thin films significantly improves the optical limiting properties.
| Original language | English |
|---|---|
| Pages (from-to) | 12319-12325 |
| Number of pages | 7 |
| Journal | New Journal of Chemistry |
| Volume | 41 |
| Issue number | 20 |
| DOIs | |
| Publication status | Published - 21 Sept 2017 |
| Externally published | Yes |
Bibliographical note
Funding Information:This work was supported by the Department of Science and Technology (DST) and National Research Foundation (NRF) of South Africa through DST/NRF South African Research Chairs Initiative for Professor of Medicinal Chemistry and Nanotechnology, a CSUR grant from the NRF of South Africa to JM (uid: 93627), and a DAAD-NRF in-country doctoral scholarship to GK. Photophysical measurements were made possible by the Laser Rental Pool Programme of the Council for Scientific and Industrial Research (CSIR) of South Africa.
Publisher Copyright:
© 2017 The Royal Society of Chemistry and the Centre National de la Recherche Scientifique.