Green, A.P. and Buckley, A.R. (2014) Solid state concentration quenching of organic fluorophores in PMMA. Physical Chemistry Chemical Physics, 17 (2). 1435 - 1440. ISSN 1463-9076
Abstract
In this study the concentration quenching phenomenon is explored for seven organic singlet emitters (Rhodamine 6G, Pyridine 2, Lumogen F Red 305, Perylene, Coumarin 102, DCM and DCJTB) in an inert host of poly(methyl methacrylate) (PMMA). Combining fluorescence lifetime and quantum yield measurements on samples of different molecular separation allows a deep decay rate analysis to be performed yielding, for each fluorophore, a monomial power law that indicates the strength and type of interaction. The fluorophores studied exhibit interactions in between that of FRET-like dipole–dipole (R−6) and surface–surface (R−2) with many lying close to that expected for surface–dipole (R−3) interactions. With no observed dependence on molecular structure it is concluded that the concentration quenching rate in singlet emitters follows a power law as kCQ = aR−3.1±0.7 with aggregation expected to increase the magnitude of the observed power.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2014 The Author(s). This is an Open Access article distributed under the terms of the Creative Commons Attribution Licence (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield) |
Funding Information: | Funder Grant number EPSRC EP/I032541/1 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 02 Mar 2015 16:07 |
Last Modified: | 02 Mar 2015 16:07 |
Published Version: | http://dx.doi.org/10.1039/c4cp05244g |
Status: | Published |
Publisher: | Royal Society of Chemistry |
Refereed: | Yes |
Identification Number: | 10.1039/c4cp05244g |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:83903 |