One- and two-photon absorption properties of quadrupolar A-π-D-π-A dyes with donors of varying strengths.
Dyes
Intermediate state
Intramolecular charge transfer
Two-photon absorption
Journal
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy
ISSN: 1873-3557
Titre abrégé: Spectrochim Acta A Mol Biomol Spectrosc
Pays: England
ID NLM: 9602533
Informations de publication
Date de publication:
05 Apr 2020
05 Apr 2020
Historique:
received:
02
11
2019
revised:
12
12
2019
accepted:
27
12
2019
pubmed:
25
1
2020
medline:
25
1
2020
entrez:
25
1
2020
Statut:
ppublish
Résumé
In this work, the one- and two-photon absorption properties of two quadrupolar A-π-D-π-A dyes, featuring carbazole and triphenylamine as donors of varying strengths, are calculated using density functional theory. The characteristics of two-photon excitation are analysed by using the three-state model closest to the real physical process. By taking the intermediate state as a bridge, the charge transfer characteristics in the two-photon excitation process are studied in detail by using various visualisation methods. Comparing the intramolecular charge transfer (ICT) characteristics shows that increasing the ability of the push-pull electrons of the central substituents, thus increasing the intramolecular charge transfer, is a more efficient method to enhance the molecular σ
Identifiants
pubmed: 31978692
pii: S1386-1425(19)31414-3
doi: 10.1016/j.saa.2019.118015
pii:
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
118015Informations de copyright
Copyright © 2019. Published by Elsevier B.V.
Déclaration de conflit d'intérêts
Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.