Issue 9, 2019

One- and two-photon absorption properties of quadrupolar thiophene-based dyes with acceptors of varying strengths

Abstract

The one-photon (1P) and two-photon (2P) absorption properties of three quadrupolar dyes, featuring thiophene as a donor and acceptors of varying strengths, are determined by a combination of experimental and computational methods employing the density functional theory (DFT). The emission shifts in different solvents are well reproduced by time-dependent DFT calculations with the linear response and state specific approaches in the framework of the polarizable continuum model. The calculations show that the energies of both 1P- and 2P-active states decrease with an increase of the strength of the acceptor. The 2P absorption cross-sections predicted by the response theory are accounted for by considering just one intermediate state (S1) in the sum-over-states formulation. For the chromophore featuring the stronger acceptor, the energetic positions of the 1P- and 2P-active states prevent the exploitation of the theoretically predicted very high 2P activity due to the competing 1P absorption into the S1 state.

Graphical abstract: One- and two-photon absorption properties of quadrupolar thiophene-based dyes with acceptors of varying strengths

Supplementary files

Article information

Article type
Paper
Submitted
03 jan 2019
Accepted
21 fev 2019
First published
21 fev 2019

Photochem. Photobiol. Sci., 2019,18, 2180-2190

One- and two-photon absorption properties of quadrupolar thiophene-based dyes with acceptors of varying strengths

S. Canola, L. Mardegan, G. Bergamini, M. Villa, A. Acocella, M. Zangoli, L. Ravotto, S. A. Vinogradov, F. Di Maria, P. Ceroni and F. Negri, Photochem. Photobiol. Sci., 2019, 18, 2180 DOI: 10.1039/C9PP00006B

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Spotlight

Advertisements