Design strategies for ratiometric chemosensors: modulation of excitation energy transfer at the energy donor site
Author
Guliyev, R.
Coskun, A.
Akkaya, E. U.
Date
2009Source Title
Journal of the American Chemical Society
Print ISSN
0002-7863
Volume
131
Issue
25
Pages
9007 - 9013
Language
English
Type
ArticleItem Usage Stats
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Abstract
Excitation energy transfer, when coupled to an ion-modulated ICT chromophore, creates novel opportunities in sensing. The direction of energy transfer and the point of ICT modulation can be varied as desired. In our previous work, we have shown that energy transfer efficiency between two energetically coupled fluorophores will be altered by the metal ion binding to the ICT chromophore carrying a ligand. There are two beneficial results: increased pseudo-Stokes shift and expanded dynamic range. Here, we explored the consequences of the modulation of energy transfer efficiency at the energy donor site, in a molecular design which has an ICT type metal ion-sensitive chromophore placed as the energy donor in the dyad. Clear advantages emerge compared to the acceptor site modulation: unaltered emission wavelength in the red end of the visible spectrum, while keeping a large Stokes shift and the ratiometric character. © 2009 American Chemical Society.
Keywords
Acceptor sitesChemo-sensors
Design strategies
Emission wavelength
Energy donors
Energy transfer efficiency
Expanded dynamic range
Metal ion binding
Molecular design
Ratiometric
Stokes shift
Visible spectra
Emission spectroscopy
Energy transfer
Excitation energy
Metal ions
Modulation
Chromophores
Chemical binding
Chemical structure
Chromatophore
Modulation transfer function
Sensor
Synthesis
Binding sites
Fluorescent dyes
Ions
Ligands
Metals
Spectrometry, fluorescence
Spectrophotometry
Permalink
http://hdl.handle.net/11693/22705Published Version (Please cite this version)
http://dx.doi.org/10.1021/ja902584aCollections
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