Title: Improved Spectral Coverage and Fluorescence Quenching in Donor-acceptor Systems Involving Indolo[3-2-b]carbazole and Boron-dipyrromethene or Diketopyrrolopyrrole
Authors: Khetubol, Adis ×
Van Snick, Sven
Clark, Melissa L
Fron, Eduard
Coutino-Gonzalez, Eduardo
Cloet, Arvid
Kennes, Koen
Firdaus, Yuliar
Vlasselaer, Maarten
Leen, Volker
Dehaen, Wim
Van der Auweraer, Mark #
Issue Date: Jun-2015
Publisher: Pergamon Press
Series Title: Photochemistry and Photobiology vol:91 issue:3 pages:637-653
Article number: 10.1111/php.12437
Abstract: A novel π-conjugated triad and a polymer incorporating indolo[3,2-b]-carbazole (ICZ) and 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPY) were synthesized via a Sonogashira coupling. Compared to the parent BODIPY the absorption and fluorescence spectrum were for both compounds broader and red-shifted. The red-shift of the fluorescence and the decrease of the fluorescence quantum yield and decay time upon increasing solvent polarity were attributed to the formation of a partial charge transfer state. Upon excitation in the ICZ absorption band the ICZ fluorescence was quenched in both compounds mainly due to energy transfer to the BODIPY moiety. In a similar ICZ-π-DPP polymer, (where DPP is diketopyrolopyrrole), a smaller red shift of the absorption and fluorescence spectra compared to the parent DPP was observed. A less efficient quenching of the ICZ fluorescence in the ICZ-π-DPP polymer could be related to the unfavorable orientation of the transition dipoles of ICZ and DPP. The rate constant for energy transfer was for all compounds an order of magnitude smaller than predicted by Förster theory. While in a solid film of the triad a further red-shift of the absorption maximum of nearly 100 nm was observed, no such shift was observed for the ICZ-π-BODIPY polymer. This article is protected by copyright. All rights reserved.
ISSN: 0031-8655
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Molecular Imaging and Photonics
Molecular Design and Synthesis
× corresponding author
# (joint) last author

Files in This Item:
File Description Status SizeFormat
Manuscript-photochemistry_and_photobiologyliriastot2.pdf Published 1220KbAdobe PDFView/Open
Khetubol_et_al-2015-Photochemistry_and_Photobiology.pdf Accepted 1258KbAdobe PDFView/Open Request a copy

These files are only available to some KU Leuven Association staff members


All items in Lirias are protected by copyright, with all rights reserved.

© Web of science