En routetowards panchromatic light harvesting: photophysical and electrochemical properties of Bodipy-porphyrazine conjugates

The concept of panchromatic light harvesting, that is, broad absorption cross sections throughout most of the visible range and excited state funnelling, has been realized in a novel set of porphyrazines. On one hand, zinc, copper, or magnesium ions were complexed by porphyrazines to tune their grou...

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Published in:Chemical science (Cambridge) 2014-05, Vol.5 (6), p.2580-2588
Main Authors: Kuhri, S, Engelhardt, V, Faust, R, Guldi, D M
Format: Article
Language:English
Subjects:
Absorption spectroscopy
Conjugates
Covalence
Excitation
Femtosecond
Harvesting
Magnesium
Zinc
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Engelhardt, V
Faust, R
Guldi, D M
description The concept of panchromatic light harvesting, that is, broad absorption cross sections throughout most of the visible range and excited state funnelling, has been realized in a novel set of porphyrazines. On one hand, zinc, copper, or magnesium ions were complexed by porphyrazines to tune their ground and excited state features. On the other hand, up to eight Bodipys were covalently attached to the periphery of the porphyrazines to enhance the ground state absorption. The corresponding star-shaped conjugates were probed by advanced photophysical measurements, that is, time-resolved fluorescence and femtosecond transient absorption spectroscopy. From the latter we derive spectroscopic and kinetic evidence in support of a fast and unidirectional energy transfer from the photoexcited Bodipy at the periphery to the porphyrazine at the core. In addition, the impact of the different metal centers is demonstrated.
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source PubMed Central; Royal Society of Chemistry:Jisc Collections:Royal Society of Chemistry Read and Publish 2022-2024 (reading list)
subjects Absorption spectroscopy
Conjugates
Covalence
Excitation
Femtosecond
Harvesting
Magnesium
Zinc
title En routetowards panchromatic light harvesting: photophysical and electrochemical properties of Bodipy-porphyrazine conjugates
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