Issue 24, 2013
From the journal:

Physical Chemistry Chemical Physics

Tuning the Förster overlap integral: energy transfer over 20 Ångstroms from a pyrene-based donor to borondipyrromethene (Bodipy)†

Dan Bai,a   Andrew C. Benniston,*a   Jerry Hagon,a   Helge Lemmetyinen,b   Nikolai V. Tkachenko*b  and  Ross W. Harringtonc  

* Corresponding authors

a Molecular Photonics Laboratory, School of Chemistry, Newcastle University, Newcastle upon Tyne, UK
E-mail: a.c.benniston@ncl.ac.uk
Fax: +44 (0)191 222 6929
Tel: +44 (0)191 222 5706

b Department of Chemistry and Bioengineering, Tampere University, Tampere, Finland

c Crystallography Laboratory, School of Chemistry, Newcastle University, Newcastle upon Tyne, UK

Abstract

A linear molecular dyad was synthesised comprising a pyrene–thiophene energy donor linked via a triazole unit to a borondipyrromethene (Bodipy) energy acceptor. The donor to acceptor separation distance is around 20 Å. Emission from the donor originates from a mixed π–π* and partial charge-transfer state and overlaps favourably with the absorption profile for the acceptor. The level of spectral overlap is dependent on the solvent polarity. Rates for electronic energy transfer were measured by transient absorption spectroscopy in solvents of varying polarity and refractive index. The measured rates for Förster energy transfer (kEET) correlate fairly well with the calculated overlap integrals (JF). A sigmoidal relationship is observed between kEET and the solvent polarity function ΔF.

Graphical abstract: Tuning the Förster overlap integral: energy transfer over 20 Ångstroms from a pyrene-based donor to borondipyrromethene (Bodipy)

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Article information

DOI
https://doi.org/10.1039/C3CP50173F
Article type
Paper
Submitted
14 Jan 2013
Accepted
03 May 2013
First published
07 May 2013

Phys. Chem. Chem. Phys., 2013,15, 9854-9861

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Tuning the Förster overlap integral: energy transfer over 20 Ångstroms from a pyrene-based donor to borondipyrromethene (Bodipy)

D. Bai, A. C. Benniston, J. Hagon, H. Lemmetyinen, N. V. Tkachenko and R. W. Harrington, Phys. Chem. Chem. Phys., 2013, 15, 9854 DOI: 10.1039/C3CP50173F

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