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Fluorescence resonance energy transfer and arrangements of fluorophores in integrated coumarin/cyanine systems within solid-state two-dimensional nanospace

Paper ID Volume ID Publish Year Pages File Format Full-Text
26682 43970 2011 10 PDF Available
Title
Fluorescence resonance energy transfer and arrangements of fluorophores in integrated coumarin/cyanine systems within solid-state two-dimensional nanospace
Abstract

Two functional dyes, coumarin and 3,3′-diethyloxacarbocyanine (DOC), are integrated with a wide range of DOC contents by intercalating DOC into the solid-state two-dimensional nanospace of a coumarin/phyllosilicate hybrid, wherein the coumarin moiety is anchored covalently to the phyllosilicate moiety. Ultraviolet–visible spectroscopy and X-ray diffraction analysis show that the mole ratios of DOC to coumarin moiety ([DOC]/[Coum]) range from 0.004 to 40 mol/mol, thus providing a series of systems with a variety of fluorescence properties and arrangements of fluorophores. Fluorescence spectroscopy reveals that both the coumarin moieties and DOC molecules fluoresce and that DOC even emits by excitation at 320 nm due to energy transfers within the integrated coumarin/DOC systems. The extent of the energy transfers and fluorescence intensities depend on [DOC]/[Coum]. The proposed models of the arrangements of the fluorophores for the integrated systems consist of coumarin moieties located on both close to and far from the DOC molecules in the same two-dimensional nanospace with the DOC molecules always in close proximity to a coumarin moiety. These unique arrangements of fluorophores allow two types of fluorescence behavior: (1) fluorescence resonance energy transfer (FRET) from the excited coumarin moiety located close to DOC and (2) emission by coumarin for the excited coumarin moiety located far from DOC.

Graphical abstractIntegrated coumarin/cyanine energy transfer systems are constructed with a wide extended range of cyanine content in a solid-state, two-dimensional nanoscale gallery. Relevance of unique nano-level structures to extents of FRET is discussed.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Coumarin/cyanine energy transfer systems are constructed in solid-state nanospace. ► Construction is achieved by using a coumarin/phyllosilicate hybrid. ► This construction provides a wide extent of FRET and various nano-level structures. ► Extents of FRET depend on wide ranging cyanine/coumarin ratios. ► The relevance of the unique nano-level structure to ET reaction is discussed.

Keywords
Integrated dyes system; Layered inorganic/organic hybrid; Fluorescence resonance energy transfer; Two-dimensional nanospace; Nano-level structure
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Fluorescence resonance energy transfer and arrangements of fluorophores in integrated coumarin/cyanine systems within solid-state two-dimensional nanospace
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 225, Issue 1, 1 December 2011, Pages 125–134
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
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